Page-2 news - Shandong Rizhaoxin Metal Products Co., Ltd.

2023-07-20 The production process and characteristics of galvanized sheet Galvanized sheet is a common metal sheet with many advantages, such as corrosion resistance, durability, and aesthetics. In terms of production process, fluorocarbon color coated plate is a commonly used coating material with weather resistance and corrosion resistance. This article will introduce the production process and characteristics of galvanized sheet, with a focus on the application of fluorocarbon color coated sheet. Firstly, let's learn about the production process of galvanized sheet. Galvanized sheet is a process of preventing corrosion of steel plates by coating them with a layer of zinc. Firstly, the steel plate will be cleaned and treated to remove surface impurities and oxides. Then, apply a layer of zinc on the surface of the steel plate, which can be Hot-dip galvanization or electro galvanized. The galvanized layer can provide additional protection to prevent corrosion of the steel plate in contact with the external environment. One of the characteristics of galvanized sheet is its corrosion resistance. Due to the coating of zinc on the surface of the steel plate, galvanized sheet has excellent corrosion resistance. This makes galvanized sheet more reliable for outdoor use and can maintain its beautiful appearance for a long time. In addition, galvanized sheet also has durability and can withstand various environmental and climatic conditions. Another focus is the application of fluorocarbon color coated panels. Fluorocarbon color coated sheet is a kind of galvanized sheet coated with Fluoropolymer. This coating has weather resistance, corrosion resistance, and high temperature resistance, allowing galvanized sheets to maintain a long-lasting aesthetic appearance in outdoor environments. Fluorocarbon color coated panels are widely used in the construction industry,

2023-07-07 API 5L GR.X60 ERW Steel Pipe Professional Manufacturer Shandong Rizhao Xin Metal Products Co., Ltd. API 5L X60 ERW steel pipe is a common high-grade pipe in the API5L specification for oil and gas transmission. Also known as L415 pipe, because of its minimum yield strength of 415 Mpa (60,200 psi) to get the name. Welded with ERW, EFW, HFW. API 5L X60 ERW Steel Pipe range suitable for PSL1, PSL2, Onshore/Offshore and Sour Service. The delivery condition of PSL1 is dry and often-handed materials are car-made. PSL2 is stricter and higher than PSL1 in terms of chemical composition, mechanical properties and test requirements 1. API 5L PSL1/PSL2 X60 ERW steel pipe inspection and inspection report: EN 10204 3.1PMI test report, visual inspection report, third-party inspection report, destructive test Test report, non-destructive test report, TC EN1020431NABL approved laboratory, chemical and mechanical report, Indian Boiler Regulations (IBR) test certificate 2. Packing: APL5L X60FRW steel pipes are packed in wooden boxes, plastic bags, and steel straps, or according to customer requirements 3. Surface treatment: bare, oiled, painted, galvanized, FBE, FBE double, 3LPE, 3LPP, coal tar, concrete coated and tape wrapped. End Finishes: Beveled, Square Shape cutting, threading and joining. 4. Application and use: suitable for transporting liquefied media such as gas, water and oil. 5. Delivery terms: PSL1: rolling, normalizing rolling, thermomechanical rolling, thermomechanical forming, normalizing forming, normalizin

2023-06-28 Shandong Richaoxin Metal Products Co., Ltd. NM360 wear-resistant plate NM360 wear-resistant plate is a steel plate with high strength, hardness, and wear resistance, widely used in fields such as mining, construction, metallurgy, and machinery. Its main characteristics are high hardness, good wear resistance, high strength, strong corrosion resistance, and good weldability. The use of NM360 wear-resistant plates can effectively improve the service life and production efficiency of the equipment. In the mining industry, NM360 wear-resistant plate can be used for the manufacturing of mining vehicles, mining machinery, mining equipment, etc. It can effectively reduce the frequency of equipment maintenance and parts replacement, reduce production costs, and improve production efficiency. In the construction industry, NM360 wear plate can be used in the manufacturing of construction machinery, Concrete mixer, excavators, etc., which can effectively improve the service life and durability of equipment, reduce the frequency of equipment maintenance and parts replacement, reduce production costs, and improve production efficiency. In the metallurgical industry, NM360 wear-resistant plates can be used for the manufacturing of metallurgical equipment, metallurgical machinery, etc., effectively improving the service life and durability of equipment, reducing the frequency of equipment maintenance and parts replacement, reducing production costs, and improving production efficiency. In the mechanical industry, NM360 wear-resistant plates can be used for the manufacturing of various mechanical equipment, effectively improving the service life and durability of the equipment, reducing the frequency of equipment maintenance and parts replacement, reducing production costs, and improving production efficiency.

2023-06-09 American Standard SA612/SA612M High Strength Carbon Steel Plate for Medium and Low Temperature Pressure Vessels Shandong Richaoxin Metal Products Co., Ltd. American Standard SA612/SA612M High Strength Carbon Steel Plate for Low and Medium Temperature Pressure Vessels Introduction to SA612/SA612M steel plate: SA612/SA612M steel plate is an American standard steel plate for spherical tanks, storage tanks, and pressure vessels. The product is mainly used for storing gases and liquefied gases, and is widely used in fields such as petroleum, chemical, urban gas, metallurgy, etc. SA612/SA612M steel plate execution standards: ASME SA612/SA612M, ASTM A612/A612M. SA612/SA612M steel plate delivery status: hot rolled or normalized delivery status. Chemical composition analysis of SA612/SA612M steel plate: Carbon C: ≤ 0.25 Manganese Mn: 1.00-1.50 Phosphorus P: ≤ 0.025 Sulfur S: ≤ 0.025 Silicon Si: 0.15-0.50 Copper Cu: ≤ 0.35 Chromium Cr: ≤ 0.25 Nickel Ni: ≤ 0.25 Molybdenum Mo: ≤ 0.08

2023-05-18 Introduction to ASTM-A36 Steel Plate Products of Shandong Richaoxin Metal Products Co., Ltd A36 is a fine-grained killed steel produced according to the American standard ASME standard for carbon structural steel. A36 steel plate has high strength and toughness, and is commonly used in mechanical equipment and precision machinery manufacturing, as well as precision component processing. A36 steel plate also has high toughness and can be used for manufacturing pipelines or drums. A36 steel plate production thickness is between 8mm and 500mm, and the delivery status of the steel plate is hot rolled, Under different usage conditions, delivery conditions such as normalized rolling, controlled rolling, controlled rolling, and TMCP (Thermomechanical Rolling) can be determined. The inspection level of the steel plate is customized according to the usage requirements to ensure ultrasonic inspection of A36 steel plate. A36 steel plate is often used for mechanical components, large factory construction, cutting of irregular parts, machining, or bending. Steel plate production must strictly follow ASME standards. A36 steel plate mechanical properties: A36 steel plate inspection yield strength - greater than or equal to 360MPa A36 steel plate inspection tensile strength -400MPa-550MPa A36 steel plate elongation after fracture inspection - greater than or equal to 20% A36 steel plate chemical composition: C carbon content: ≤ 0.25% Si silicon con

2023-05-06 Introduction of SA516Gr70 steel plate 1. SA516Gr70 belongs to the American standard boiler pressure vessel steel plate, and the index standard of SA516Gr70 is the special technical condition of ASTM ASME EN10028-2. SA516Gr70 itself not only has very high strength but also has very good toughness, wear resistance, fatigue resistance, impact resistance, welding ease of processing and cold forming properties, and is often used in petrochemical container manufacturing such as; pressure vessel manufacturing, expansion Sections, reactors, heat exchangers, petrochemical equipment, petroleum machinery, heads, boilers, power plant equipment, reactors, spherical tanks, nitrogen tanks, gas cylinders, liquefied gas tanks, etc. are widely used. SA516Gr70 belongs to the steel plate for medium and low temperature pressure vessels of American Standard, which is widely used in petroleum, chemical industry, power station, boiler and other industries. The steel is required to have the characteristics of low hardness, large thickness and high uniformity. Previously, the thickness of this product used in China was mainly below 150mm, and the quality inspection performance requirements were national standard first-level flaw detection. In terms of application range, the product was not only used in key domestic engineering projects, but also successfully exported to the United States, Canada, South Korea, Turkey, etc. country. The materials of SA516Gr70 steel plate under the same standard are SA516Gr55, SA516Gr60, SA516Gr60N, SA516Gr65, SA516Gr70N. 2. Chemical composition analysis of SA516Gr60 and SA516Gr70 steel plates Chemical composition of SA516Gr60 steel plate

2023-04-28 Long timber prices continue to decline, and China's export competitive advantage is evident Shandong Richaoxin Metal Products Co., Ltd. reported that the import demand for long products in Asia has remained sluggish recently. Coupled with the background of falling domestic steel prices, China's export quotation for long products has continued to decline, gradually enhancing its competitiveness in overseas markets. At the beginning of this week, a large steel mill in East China quoted a price of $605/ton FOB for the export of deformed steel products. The market has heard of a recent order for deformed steel products exported from China to Singapore, with a price of around 610CFR. According to market news, Hong Kong buyers are pessimistic about price expectations, with a significant gap between the expected level and the quoted price. Import transactions remain light, while Singaporean buyers have also stated that the current market is mainly wait-and-see and continue to be bearish on steel prices. Wire prices also continued to decline, with export quotes for East China and Northeast China ranging from $580 to $590 per ton FOB, a decrease of $10 per ton compared to the previous week. Recently, Chinese wire rods have mainly been exported to Southeast Asia, South Korea, and South America. The market has heard that the Philippines has recently completed a Chinese export resource order at a price of 560 US dollars per ton of CFR.

2023-04-21 EU imposes 17.3% Anti-Dumping Duty duty on Türkiye's hot-rolled stainless steel plate On July 26, 2022, the European Commission launched an anti circumvention investigation on hot-rolled stainless steel plates and coils imported from Türkiye and originating in or imported from Indonesia. On April 17, 2023, the European Commission disclosed its investigation results. The results showed that Indonesia consigned the local hot rolled stainless steel plates to Türkiye, and then exported them to the EU to avoid Anti-Dumping Duty. Therefore, the Commission decided to extend the anti-dumping measures against Indonesia to Türkiye, that is, impose a 17.3% Anti-Dumping Duty on Türkiye's hot rolled stainless steel plates.

2023-04-14 China's steel export prices continue to decrease According to Mysteel's understanding, the prices of long timber in Asia have continued to decline recently. The market has heard that a Vietnamese factory has recently reached an export transaction for rebar to Hong Kong and Singapore, with prices of $645 per ton of CFR real weight and $630 per ton of CFR weight, respectively. The completion of this transaction has prompted the import level of rebar in Southeast Asia to continue to decline. In terms of Chinese exports, due to the decline in domestic prices and poor overseas demand, the export prices of long products have generally been lowered. This week, the export price of deformed steel bars from a large steel factory in East China was reduced by $10/ton to $620/ton FOB weight, with a shipping schedule from May to June. In terms of wire rods, the export quotation for SAE1008 wire rods from North China Resources is around 620-640 US dollars per ton FOB, a decrease of 10-20 US dollars per ton compared to last week; Indonesian blast furnace wire is quoted at $630 per ton CFR Southeast Asia, but according to market feedback, there is currently insufficient purchasing interest from Southeast Asian buyers. The Philippines has just returned from the Easter holiday, and overall import trading activity remains weak.

2023-04-06 Turkish HRC exports weaken, Russian slab prices fall It is understood that the Turkish steel export market is weak at present, and the price of hot coil is about 815-830 US dollars/ton FOB, which is 10-20 US dollars/ton lower than last week, and the transaction situation is not good. The sluggish steel export from Turkey has led to a slowdown in the demand for imported slabs from Russia, and the price of Russian slabs has also fallen accordingly, and is currently about US$600-620/ton FOB. Except for Turkey, Italy has not purchased imported resources from Russia recently, and it is expected that the price of Russian slabs will continue to weaken in the later period.

2023-03-31 Multiple factors interfere with Turkish rebar prices continue to fall Recently, Turkish rebar prices have continued to decline. The mainstream quotation of steel mills is 720-740 US dollars / ton FOB, which is 10 US dollars / ton lower than last week. According to market feedback, the current price is still higher than the psychological expectation of buyers. European traders said that they may consider 710 US dollars / ton FOB and below resources, and they continue to be bearish on recent export prices, Turkish steel mills said that if rebar prices maintain this trend in April, exports may improve. Domestic prices have also dropped. Currently, Turkey is in the Ramadan period, and the market demand is slowing down. In addition, the price of imported steel scrap continues to fall. Recently, the import price of mixed heavy scrap HMS 1/2 (80:20) is 440-450 US dollars / ton CFR, The price support of rebar is insufficient, and the ex-factory price has dropped to around US$720-730/ton. In addition, Turkey will hold presidential and parliamentary elections on May 14, which will bring some uncertainty to the market, and some buyers choose to wait and see.

2023-03-16 In the first quarter, China's steel market is expected to improve and the trend of stabilization and recovery will continue In the first two months of this year, China's steel market performed well. Experts from the Lange Steel Economic Research Center analyzed on the 15th that, looking forward to the first quarter and the year, the Chinese steel market is still expected to be positive, and the trend of stabilization and recovery will continue. According to data from the National Bureau of Statistics, from January to February, the added value of industrial enterprises above designated size increased by 2.4% year-on-year, 1.1 percentage points faster than that in December 2022. National fixed asset investment (excluding rural households) increased by 5.5% year-on-year, 0.4 percentage points faster than that in 2022. In the fixed asset investment structure, industrial investment increased by 10.0% year-on-year, and infrastructure investment increased by 9.0% year-on-year, showing a strong rebound. Chen Kexin, chief analyst of the Lange Steel Economic Research Center, believes that in the first two months of this year, the national steel market related indicators showed a steady recovery and accelerated growth momentum. Although the national real estate development investment fell by 5.7% year-on-year, the decline has narrowed significantly and is developing in a good direction. The macro economy has picked up significantly, and the related indicators of the steel market are generally improving, which shows that the domestic demand for steel has also improved accordingly. According to statistics from the General Administration of Customs, in the first two months of this year, the national steel export volume was 12.19 million tons, an

2023-03-09 The overseas steel price continues to be strong, and China's resource price advantage is obvious The overseas steel price of Shandong Richaoxin Metal Products Co., Ltd. has continued to rise recently. In the United States, the relevant departments previously said that the infrastructure construction projects such as roads and bridges subsidized by the government should use the construction materials produced in the United States. In recent weeks, the purchase orders of downstream steel enterprises have surged, and the delivery prices of hot coils have been increased by large leading steel mills such as Newco Steel and Cleveland - Cleves. At present, the delivery orders in April are basically sold out, and the price of mainstream hot coils in the United States has risen to 1200 dollars/ton EXW, with a rise of about 200 dollars/ton on a month-on-week basis. From the perspective of the Black Sea, Türkiye's demand for steel in the short and medium term has increased significantly. The price of local hot coils has risen to 820 dollars/ton, and Russia's offer of hot coils to Türkiye has also risen to 780 dollars/ton CFR. In addition, because some local steel mills in Türkiye cancelled their orders due to force majeure, downstream steel companies in Türkiye also increased their purchases of Chinese resources, and cold and hot coils and galvanized coils had a certain volume of orders (April May shipping date). At present, the basic export price of mainstream hot coils in North China's steel mills is 660-670 US dollars/ton FOB, the delivery price of domestic SAE1006 hot coils in Vietnam's large steel mills is 680-690 US dollars/ton CIF in April and May, and the quotation of Japanese resources has risen to 710-720 US dollars/ton FOB. Recently, Indian hot coils are mainly exported to Europe, and the mainstream price is 780-800 US dollars/ton CFR South Europe. On the whole, China's resource price advantage is obvious in the near futu

2023-02-22 Turkey starts post-disaster reconstruction, imported steel billet prices rise Recently, the Turkish government clearly proposed to officially start the post-disaster reconstruction work. It is estimated that the demand for rebar will be about 4 million tons in the next four months, so the demand for billet will be supported. It is understood that domestic billet prices in Turkey have begun to rise, but due to the low inventory level in the early stage and only about three steel mills have resumed production, the demand for imported billets has risen significantly in the short term, and Russia`s quotations for Turkish billets have also reached USD 620/ton CFR, an increase of about USD 10/ton compared with last week. Turkish buyers are well accepted. Currently, the domestic billet price in Turkey is about USD 660/ton EXW. In contrast, the price of imported resources has obvious advantages. In addition, last week, China's billet also quoted prices to Turkey, the price is about 620-630 US dollars / ton CFR, China Resources has not yet updated the quotation.

2023-02-01 The global carbon steel market will have a compound annual growth rate of 3.2% in 2022-2028 Under the background of the booming automobile manufacturing industry, the increase in the use of medium carbon steel in pipeline infrastructure projects, and the continuous growth of carbon steel consumption in various end departments, it is expected that the global carbon steel market value will reach 1092.3 billion US dollars in 2028, and the compound annual growth rate will reach 3.2% in 2022-2028. By 2028, the sales of low-carbon steel will account for more than 27% of the total sales of carbon steel, mainly used in food cans, pipes, auto body parts and building parts.

2023-01-16 Export prices rose in an all-round way, and many steel mills closed after completing the order receiving plan This week, leading steel mills in Europe, India, Vietnam, North America, Brazil and other countries raised their prices on a large scale, and the trading activity in Asia was moderate. Due to the tightening of supply, several European steel mills in Vietnam and Europe, which had earlier reduced production, began to plan to resume production from the end of January to February. In addition, the auto industry data showed that the global auto industry demand recovered in December, giving some support to the price. Hot-rolled plate and coil: the price of hot-rolled plate and coil in China rose slightly this week, with the increase of 50-100 yuan/ton in major cities. Due to the accelerated appreciation of the RMB, the offshore dollar price rose further this week. On Friday, the central parity rate between the People's Bank of China and the US dollar reached 6.7292, up from 3.8912 on Friday. At the beginning of this week, the quoted price of the leading steel mill was raised to 730-740 US dollars/ton FOB, and the price of traders was basically 625 US dollars/ton FOB. However, Chinese exporters generally reported that the export demand this week was significantly weaker than last week, and buyers were hesitant to raise the price this week after completing a certain replenishment in the early stage. For Chinese steel mills, the order receiving situation was relatively good in the early stage, especially for exports to Türkiye, Southeast Asia and other places. At present, the enthusiasm for order receiving has also decreased slightly. Medium plate export: the export price of China's medium plate rose slightly this week. With the overall good order reception, the steel mill's offer rose. The actual transaction level of the resources of the leading steel mills in Northeast Chin

2023-01-05 The price of steel exports rose again, and the buyers stayed on the sidelines Although the domestic trade prices of various varieties of steel in China were weak this week, most steel mills continued to raise their export prices this week. In terms of long materials, the British standard deformed steel bars of leading steel mills in East and South China rose by 5-10 dollars to 580-605 dollars/ton FOB weight management this week. The overall trend of Southeast Asian resources has stabilized. A buyer in Hong Kong reported that the current market trading activity is relatively light. In terms of hot coils, on Tuesday, a leading steel mill in Northeast China raised the price of SS400 hot rolled coils by 15 dollars/ton FOB to 615 dollars/ton FOB, while another private steel mill in North China slightly increased by 5 dollars/ton to 605 dollars/ton FOB. According to the assessment of traders, the current FOB of 600-605 US dollars/ton is a possible transaction level. An exporter from Zhejiang told Mysteel that the pace of order taking for hot coil exports in the past two weeks was fairly good. Although domestic trade prices were weak, the recent appreciation of the RMB was one of the direct reasons for the rise in offshore US dollar prices. On January 4, the central parity rate of the RMB exchange rate in the inter-bank foreign exchange market was 6.9131 yuan, and on December 30 before New Year's Day, the exchange rate was 6.9646 yuan. After the offer price rose, the overseas buyers have not yet given a clear follow-up response. The two exporters in Shanghai reported that there was a big gap with the expectations of Southeast Asian buyers, and the follow-up was temporarily slow.

2022-12-23 China's steel price continues to rise. Overseas prices rise along with Due to the recent rapid rise in China's steel prices, overseas steel prices are rising. At present, the price of mainstream hot rolls in the United States is 750 dollars/ton, up 30 dollars/ton on a weekly basis. From the perspective of Europe, the demand for steel is still light. The delivery orders of mainstream steel mills in December have just been sold out. The price of mainstream hot coils in Northern Europe is 710-720 US dollars/ton, up slightly from last week. From the perspective of Russia, the export price of mainstream Russian plates has also been greatly adjusted due to the substantial increase in the export price of Chinese resources to Southeast Asia and the Middle East. At present, the price of S235JR hot coil is 570 dollars/ton FOB black sea, and the price of DC01 cold coil is 710-720 dollars/ton FOB black sea, which has increased significantly compared with last week. With the sharp rise of domestic steel prices, the quoted prices of large steel mills in the north are generally above 600 US dollars/ton FOB this week, and there are no large orders for the time being. With the relaxation of epidemic prevention and control, China's steel mills have generally opened up domestic demand in the future market, and are not willing to cut prices for export. In addition, Vietnam Formosa Plastics Hejing raised the price of local hot coil delivery in February by 50 dollars/ton to 592 dollars/ton CIF, which has a certain price advantage over Chinese resources. Vietnam Hefa Steel is also expected to raise the delivery price of hot coil in February to 580-590 dollars/ton. In the short term, China's resources do not have a price advantage, and exports to Southeast Asia will continue to be blocked.

2022-12-16 The difference between galvanized sheet and aluminized zinc coil The surface of the aluminum zinc plated steel coil presents a unique smooth, flat and gorgeous star, and the basic color is silver white. The special coating structure makes it have excellent corrosion resistance. The normal service life of the aluminized zinc plate can reach 25a, and the heat resistance is very good, which can be used in the high temperature environment of 315 ℃; The coating has good adhesion with the paint film, has good processing performance, and can be punched, sheared, welded, etc; The surface conductivity is very good. The coating is composed of 55% aluminum, 43.4% zinc and 1.6% silicon according to weight ratio. The production process of aluminum zinc plated steel sheet is similar to that of zinc plated steel sheet and aluminum plated steel sheet. It is a continuous molten coating process. When both sides are exposed to the same environment, the aluminum zinc plated steel sheet with 55% aluminum zinc alloy coating has better corrosion resistance than the galvanized steel sheet with the same thickness. The aluminum zinc plated steel plate with 55% aluminum zinc alloy coating not only has good corrosion resistance, but also has excellent adhesion and flexibility. characteristic: 1. Thermal reflectance: The thermal reflectivity of the aluminum zinc plated steel plate is very high, twice that of the zinc plated steel plate. People often use it as a thermal insulation material. 2. Heat resistance: Aluminum zinc alloy steel plate has good heat resistance and can wi

2022-12-06 The production process of galvanized steel wire Galvanized steel wire is led out from 45 #, 65 #, 70 # and other high-quality carbon structural steel, and then galvanized (electro galvanized or hot galvanized). Galvanized steel wire is a kind of carbon steel wire galvanized on the surface by hot plating or electroplating. Its properties are the same as those of straightened tempered steel wire. It can be used as unbonded prestressed reinforcement, but it shall be galvanized at least 200~300g per square meter. It is often used as a parallel wire rope for cable-stayed bridges (in addition, flexible cable sleeves are also used as an outer layer of protection). physical property The surface of galvanized steel wire is smooth and clean without cracks, knots, thorns, scars and rust. The zinc coating is uniform, with strong adhesion, durable corrosion resistance, excellent toughness and elasticity. The tensile strength shall be between 900 Mpa and 2200 Mpa (wire diameter Φ 0.2mm- Φ 4.4 mm) Number of twists( Φ 0.5mm) for more than 20 times and repeated bending for more than 13 times. The thickness of hot-dip galvanized coating is 250g/m. The corrosion resistance of steel wire is greatly improved. intention Galvanized steel wire is mainly used in planting greenhouses, breeding farms, cotton packaging, spring and wire rope manufacturing. It is applicable to engineering structures with poor environmental conditions such as cable-stayed bridges and sewage tanks. Drawing

2022-12-02 Production process of spiral steel tube Spiral steel tube is a spiral seam steel pipes made of strip steel coil as raw material, extruded at room temperature, and welded by automatic double wire double-sided submerged arc welding process. The spiral steel pipe sends the strip steel to the welding pipe unit. After multi roll rolling, the strip steel gradually rolls up to form a round billet with an opening gap. Adjust the reduction of the extrusion roll to control the weld gap at 1~3mm, and make both ends of the weld crater flush. Production process (1) The raw materials are strip steel coil, welding wire and welding flux. They must pass strict physical and chemical tests before being put into use. (2) Single wire or double wire submerged arc welding shall be adopted for butt joint of strip steel head and tail, and automatic submerged arc welding shall be adopted for repair welding after being drawn into steel pipe. (3) Before forming, the strip steel shall be leveled, trimmed, planed, cleaned, transported and pre bent. (4) The electric contact pressure gauge is used to control the pressure of air cylinders on both sides of the conveyor to ensure smooth belt steel transmission. (5) External control or internal control roll forming is adopted. (6) Weld gap control device shall be used to ensure that the weld gap meets the welding requirements, and pipe diameter, dislocation and weld gap shall be strictly controlled.

2022-11-14 Features of Cold Rolled Coils Cold rolled steel is steel produced by cold rolling. Cold rolling is a steel sheet obtained by further thinning the No. 1 steel sheet to a target thickness under room temperature conditions. Compared with hot-rolled steel, cold-rolled steel has a more precise thickness, smooth and beautiful surface, and also has various superior mechanical properties, especially in terms of processability. Because cold-rolled raw coils are relatively brittle and hard, and are not suitable for processing, cold-rolled steel sheets are usually required to be annealed, pickled and surface smoothed before being delivered to customers. The maximum thickness of cold rolling is below 0.1--8.0MM. For example, the thickness of cold-rolled steel plate in most factories is below 4.5MM; the minimum thickness and width are determined according to the equipment capacity and market demand of each factory. The difference between cold-rolled steel and hot-rolled steel is not in the smelting process, but in the rolling temperature, or the end temperature of rolling. Cold-rolled steel is when the final rolling temperature is lower than the recrystallization temperature of the steel. Hot-rolled steel is easy to roll and has high rolling efficiency, but under hot-rolled conditions, the steel is oxidized, and the surface of the product is dark gray. Cold-rolled steel requires high rolling mill power and low rolling efficiency, and intermediate annealing is required to eliminate work hardening during the rolling process, so the cost is also high, but cold-rolled steel has a bright surface and good quality, and can be directly used for processing. The finished product, so cold-rolled steel sheet is widely used. Using hot-rolled steel coil as raw material, after pickling to remove oxide scale, cold continuous

2022-11-07 Classification and use of corrugated steel plate Corrugated steel sheets are divided into galvalume corrugated steel sheets (aluminum zinc plated corrugated steel plate), galvanized corrugated steel sheets and aluminum corrugated steel sheets according to different coatings and materials. Galvanized corrugated steel sheets are cold-rolled continuous hot-dip galvanized steel sheets and strips with a thickness of 0.25 to 2.5 mm. It is widely used in construction, packaging, railway vehicles, agricultural machinery manufacturing and daily necessities. Galvanized corrugated steel sheet is also called galvanized sheet or white iron sheet: it is a cold-rolled continuous hot-dip galvanized sheet and strip with a thickness of 0.25 to 2.5 mm. The surface of the steel plate is beautiful, with block-like or leaf-like zinc crystal patterns, and the galvanized layer is firm and has excellent atmospheric corrosion resistance. At the same time, the steel plate has good welding performance and cold forming performance. Compared with electro-galvanized steel sheet, hot-dip galvanized steel sheet has a thicker galvanized layer and is mainly used for parts requiring strong corrosion resistance. Galvanized sheet is widely used in construction, packaging, railway vehicles, agricultural machinery manufacturing and daily necessities. The minimum width of the corrugated plate on the steel structure is 600~1800mm, and the basic thickness: 2.5, 3.0, 3.5, 4.0, 4.5, 5.0, 5.5, 6.0, 7.0, 8.0mm. Width: 600~1800mm, graded by 50mm. Length: 2000~12000mm, graded by 100mm.

2022-10-31 Characteristics of Special Purpose Steels Special steel, that is, special steel, is the most important type of steel used in most industries of the national economy, such as machinery, automobiles, military industry, chemical industry, household appliances, ships, transportation, railways and emerging industries. Special steel is an important symbol to measure whether a country can become a steel powerhouse. Special-purpose steel refers to other components made to work under special conditions and have special requirements for steel, such as physical, chemical, mechanical and other properties. Special performance steel is also special quality alloy steel. These steels refer to steels with electromagnetic, optical, acoustic, thermal and electrochemical effects and functions. Commonly used are stainless steel, heat-resistant steel, electrical silicon steel, electronic pure iron and various precision alloys (soft magnetic alloys, like magnetic alloys, elastic alloys, expansion alloys, thermal double alloys, resistance alloys, galvanic materials, etc.). Stainless steel is named for its good corrosion resistance, and its main alloy components are chromium and nickel. Chromium has high chemical stability and can form a dense and tough purification film in an oxidizing medium; in addition, when the chromium content exceeds 11.7%, the electrode potential of the alloy can be significantly increased, thereby effectively preventing further oxidation of the alloy. Nickel is also a facilitator. Adding nickel to chromium steel can improve the corrosion resistance of the alloy in non-oxidizing media. When the content of chromium and nickel is constant, the lower the carbon content in the steel, the better the corrosion resistance.