Iron & Steel

High-speed steel has good process performance, good strength and toughness, so it is mainly used to manufacture complex thin-edged and impact-resistant metal cutting tools, as well as high-temperature bearings and cold extrusion dies. In addition to the high-speed steel produced by the smelting method, powder metallurgy high-speed steel appeared after the 1960s, which has the advantage of avoiding the reduction of mechanical properties and heat treatment deformation caused by the segregation of carbides produced by the smelting method. The heat treatment process of high-speed steel is more complicated, and it must go through a series of processes such as quenching and tempering. Quenching is generally carried out in two stages due to its poor thermal conductivity. First preheat at 800 ~ 850 ℃ (to avoid causing large thermal stress), then quickly heat to the quenching temperature of 1190 ~ 1290 ℃ (the actual temperature of different brands is different), and then oil cooling or air cooling or gas cooling. The factories are all heated by salt furnaces, and vacuum furnaces are also widely used. After quenching, a part (about 30%) of retained austenite remains in the internal structure and is not transformed into martensite, which affects the performance of high-speed steel. In order to transform the retained austenite and further improve the hardness and wear resistance, it is generally necessary to carry out 2 to 3 tempering times, the tempering temperature is 560 ° C, and the temperature is kept for 1 hour each time. Production method: Usually electric furnace is used for production, and powder metallurgy method was used to produce high-speed steel, so that the carbides are evenly distributed on the substrate in the form of extremely fine particles, which improves the service life. Uses: used in the manufacture of various cutting tools. Such as turning tools, drills, hob, machine saw blades and molds with high requirements. We provide high-quality steel, ex-factory price, support customization, strong company and factory strength; welcome your inquiry and order；please contact us for quotes. MiKi Zhuo E-mail:jacklu@songshunsteel.com Skype/W , hatsapp/Wechat:+86-18269260283 ADD:No.4 Dongda Street, Shatou, Changan Town, Dongguan City, Guangdong Province, P.R.C China Company website: https://steelpurchase.com/ http://w , ww.songshunsteel.com/ songshunmoldsteel41404340 ,

Minimum Order: 1 bags

Dongguan Songshun Mould Steel Co., Ltd. is an Indusrtial and trading company with 2 warehouses that manufactures good & high quality kinds of steels starting from 2012. The company provides the customized products and OEM service. What´s more, we keep the mass stock of over 20000 tons. In those years, we offer a wide range of steels to our customers from all over the world. And we enjoy high praise among them. Quick Details Steel Grade:high speed tool steel Standard:AiSi, ASTM, bs, DIN, GB, JIS, AISI,ASTM,BS,DIN,JIS Place of Origin:Guangdong, China Brand Name:SONGSHUN Model Number:T1/1.3355/SKH2/W18Cr4V Technique:forged or hot rolled, Hold rolled,Cold Drawn Application:Tool Steel Bar, Die Steel Bar Alloy Or Not:Is Alloy Special Use:Mold Steel Type:Alloy Steel Bar, Alloy Steel Bar,Mold Steel Surface:black/oiled/bright Shape:round , /flat/plate Hardness of annealed:HBS≤240-300 Dimensions:10mm~800mm Certificate:SGS BV ISO Charateristics After electroslag remelting (ESR), H11 steel will have a fine uniform texture, good hardenability, excellent machining & polishing performance, high toughness & plasticity, good wear/heat/fatigue resistance in high and low temperature. Applications Typical H11 applications include die casting dies for aluminium, magnesium and zinc, extrusion dies for aluminium and brass, liners, mandrels, pressure pads, followers, bolsters, die cases, die holders and adaptor rings for copper and brass extrusion. Other applications include plastic moulds, shear blades for hot work and hot swaging dies. Also used to produce hot stamping and press forge dies, split hot heading dies, gripper dies, hot punching, piercing and trimming tools. WELCOME TO GET A QUOTE MiKi Zhuo E-mail:jacklu@songshunsteel.com Skype/W , hatsapp/Wechat:+86-18269260283 ADD:No.4 Dongda Street, Shatou, Changan Town, Dongguan City, Guangdong Province, P.R.C China Company website: https://steelpurchase.com/ http://w , ww.songshunsteel.com/ songshunmoldsteel41404340 ,

Minimum Order: 5 dozens

1. 4140 steel is an alloy structural steel with high strength, hardenability, good toughness and small deformation during quenching.It is used to manufacture forgings that require higher strength and larger quenched and tempered section than 35CrMo steel, such as large gears for locomotive traction, supercharger transmission gears, rear axles, connecting rods and spring clips that are heavily loaded, and can also be used for Drill pipe joints and fishing tools for oil wells below 2000m. 2. 4140 Product Process Treatment Heat treatment process: Annealing annealing No.1 "760±10℃ annealing, furnace cooling to 400℃ air cooling. HB220-230 Normalize normalize No.4 860±10℃ normalizing, air-cooled. Quenching+tempering No.5 840±10℃ quenching water or oil (depending on the complexity of the product shape), tempering at 680-700 degrees. HB<217 Quenching+tempering No.6 quenching oil at 840±10℃, and then tempering at 470℃. HRC41-45 Quenching+tempering No.7 quenching oil at 840±10℃, and then tempering at 480℃. HRC35-45 Quenching+tempering No.8 Quenching oil at 850°C, and then tempering at 510°C. HRC38-42 Quenching+tempering No.9 quenching oil at 850℃, and then tempering at 500℃. HRC40-43 Quenching+tempering No.10 Quenching oil at 850℃, and then tempering at 510℃. HRC36-42 Quenching+tempering No.11 Quenching oil at 850℃, and then tempering at 560℃. HRC32-36 Quenching+tempering No.12 Oil quenching at 860°C, and then tempering at 390°C. HRC48-52 3. 4140 Product Information 1.Surface Treatment Plate: Origin Black, Orign cold rolled bright, Machined, Grinded Bar:  Origin Black, Orign cold rolled(drawn) bright, Turned, Peeled, Grinded 2.Heat treatment specification Heat treatment standard: quenching at 850℃, oil cooling; tempering at 560℃, water cooling, oil cooling; 3.Available Size: Round bar: Diameter(mm) Max 800mm; Length(mm) Max 12000mm. Plate: Thickness(mm) Max 800mm; Width(mm) Max 2300mm; Length(mm) Max 12000mm. Condition: Cold rolled(drawn)≤50mm, Hot rolled≤12-250mm, Hot forged≥50mm. 4.AISI 4140/DIN 1.7225 Introduction: AISI 4140 alloy steel is chromium, molybdenum, manganese containing low alloy steel. It has high fatigue strength, abrasion and impact resistance, toughness, and torsional strength. 5.Video Description https://steelpurchase.com/steel-video/ 4. We provide high-quality steel, ex-factory price, support customization, strong company and factory strength; welcome your inquiry and order；please contact us for quotes. MiKi Zhuo E-mail:jacklu@songshunsteel.com Skype/W , hatsapp/Wechat:+86-18269260283 ADD:No.4 Dongda Street, Shatou, Changan Town, Dongguan City, Guangdong Province, P.R.C China For more 4140 steel product information, please click this link: https://steelpurchase.com/4140-scm440-172 , 25-steel/ Company website: https://steelpurchase.com/ http://w , ww.songshunsteel.com/ songshunmoldsteel41404340 ,

Minimum Order: 3 bushels

What is high hardenability? It indicates that the ability of steel to obtain the depth of the hardened layer when quenched under certain conditions is mainly affected by the carbon content and alloying elements in the austenite. It indicates that the ability of steel to obtain the depth of the hardened layer when quenched under certain conditions is mainly affected by the carbon content and alloying elements in the austenite. Hardenability: refers to the characteristics that determine the hardening depth and hardness distribution of steel under specified conditions. The hardenability of steel is good or bad, which is usually expressed by the depth of the hardened layer. The greater the depth of the hardened layer, the better the hardenability of the steel. Namely high hardenability!! The hardenability of steel mainly depends on its chemical composition, especially the alloying elements and grain size that increase the hardenability, heating temperature and holding time and other factors. The steel with good hardenability can obtain uniform mechanical properties of the entire section of the steel, and a quenching agent with a small quenching stress of the steel can be selected to reduce deformation and cracking. songshunmoldsteel41404340

Minimum Order: 1 bags

A106 seamless steel pipe is a kind of seamless steel pipe used for conveying water, oil, gas and other high temperature fluid. ASTM A106 seamless steel pipe belongs to the United States standard steel pipe, A106 includes A106-A, A106-B.The former is equivalent to the domestic 10# material, the latter is equivalent to the domestic 20# material.It belongs to ordinary carbon steel series and is one of the commonly used materials.ASTM A106 seamless steel tube includes two processes: cold drawing and hot rolling.In addition to the production process, the two are different in precision, surface quality, minimum size, mechanical properties, and organizational structure.Widely used in petroleum, chemical, boilers, power stations, ships, machinery manufacturing, automotive, aviation, aerospace, energy, geology, construction and military industries and other industries. ASTM A106 Method for Calculating Pressure on Seamless Steel Tubes S choose S = 8;P is less than 17.5MPa seamless steel pipe, S is the safety factor of seamless steel pipe, the wall thickness is 3mm, Pressure P= (2*σ/S*δ) /D

Dongguan Songshun Mould Steel Co., Ltd. Dongguan Songshun Mould Steel Co., Ltd. is an Indusrtial and trading company with 2 warehouses that manufactures good & high quality kinds of steels starting from 2012. The company provides the customized products and OEM service. What´s more, we keep the mass stock of over 20000 tons. In those years, we offer a wide range of steels to our customers from all over the world. And we enjoy high praise among them. SAE 4340 steel Product Details  ·GB steel number:CN:40CrNiMoA DIN:36CrNiMo4 JIS:SNCM439 BS:816M40  US:AISI/ASTM4340 ·keyword:SAE Alloy 4340 Steel Bar ·Usage: It is used as important quenched and tempered parts that require good toughness,high strength and large size, such as heavy machinery and high-load shafts,turbine shafts with a diameter greater than 250mm, helicopter rotor shafts, turbojet engine turbine shafts,blades, high Loaded transmission parts, crankshaft fasteners. gears, etc.; ·Other Steel Types:5140 /4140 / 4340 / 4142 / 15CrMo / 6150 / 38CrMoAI / 8620 ..... ·Serve:OEM/ODM ·Delivery status:With heat treatment (normalized, annealed or high temperature tempered) or without heat treatment Goods, the delivery status should be specified in the contract ·AISI/ASTM 4340 Chemical Composition C:0.37-0.44  Si:0.17-0.37  S:≤0.035  P:≤0.035 Mn:0.50-0.80 Cr:0.60-0.90 Mo:0.15-0.25 N:1.25-1.65 ·ASTM 4340 Mechanical Properties Tensile strength σb (MPa): ≥980(100) Yield strength σs (MPa): ≥835(85) Elongation δ5 (%): ≥12 Area shrinkage ψ (%): ≥55 Impact energy Akv (J): ≥78 Elongation δ5 (%): ≥12 Area shrinkage ψ (%): ≥55 Impact energy Akv (J): ≥78 Impact toughness value αkv (J/cm2): ≥98(10) Sample size: sample blank size is 25mm ·Surface Treatment Plate: Origin Black,Orign cold rolled bright, Machined,Grinded Bar:Origin Black, Orign cold rolled(drawn) bright,Turned, Peeled, Grinded ·For more 4340 steel product information, please click this link: https://steelpurchase.com/4340-sncm439-16 , 563-steel/# songshunmoldsteel41404340

Minimum Order: 2 barrels

Flat steel refers to steel with a width of 12-300mm, a thickness of 3-60mm, a rectangular cross-section and a slight blunt edge. Flat steel can be finished steel, and can also be used as blanks for welded pipes and thin slabs for stacked sheets. Main application: Flat steel can be used as a finished material to make hoop iron, tools and mechanical parts, and it can be used as a house frame structure and escalator in construction. advantage The flat steel is rolled with negative deviation, but is delivered according to the actual weight, and the utilization rate is 1 to 5 percentage points higher than that of the steel plate. Flat steel can be produced with fixed thickness, fixed width and fixed length according to user needs, which reduces cutting for users, saves processes, reduces labor and material consumption, and also reduces processing loss of raw materials, saving time, labor, and saving. material. Products have been professionally used in steel structure manufacturing, machinery manufacturing, automobile industry, mining machinery, hoisting machinery and other industrial materials. Profile steel is one of the four major varieties of steel (plate, tube, profile, wire). According to the section shape, the section steel is divided into simple section section steel and complex section section steel (section steel). The former refers to square steel, round steel, flat steel, angle steel, hexagonal steel, etc.; the latter refers to I-beam, channel steel, rail, window frame steel, curved steel, etc. Square steel - steel with square section, hot-rolled and cold-rolled; hot- rolled square steel has a side length of 5-250mm; cold-drawn square steel has a side length of 3-100mm. Round bar - steel with round section, divided into three types: hot-rolled, forged and cold-drawn. The diameter of hot-rolled round bar is 5-250mm, of which 5-9mm is commonly used as the raw material for drawing steel wire, called wire rod; Disk supply is also called hot rolled wire rod. The forged round steel is straight and thick, and is used as a shaft blank. The diameter of cold-drawn round steel is 3-100 mm, and the dimensional accuracy is high. Angle steel - divided into two kinds of equal angle steel and unequal angle steel. The specification of angle steel is expressed by the dimensions of side length and side thickness. The specifications of angle steel usually produced are 2-20, that is, the number of centimeters on the side. For example, No. 5 equilateral angle steel refers to an angle steel with a side length of 5cm (50mm). The same horn often has 2-7 different side thicknesses. Calculation method of flat steel weight: Flat steel: weight per meter = 0.00785 * thickness * side width Please request a quote. Contact us: MiKi Zhuo E-mail:jacklu@songshunsteel.com Skype/W , hatsapp/Wechat:+86-18269260283 ADD:No.4 Dongda Street, Shatou, Changan Town, Dongguan City, Guangdong Province, P.R.C China For more steel products information, please click this link: https://steelpurchase.com/ http://www. , songshunsteel.com/ https://songshun.en.alibaba. , com/ songshunmoldsteel41404340

Minimum Order: 1 bags

1.What is cold rolled steel? 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 sheet, cold- rolled steel sheet has more accurate 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. 2.How is cold rolled steel processed? Using hot-rolled steel coil as raw material, after pickling to remove oxide scale, cold continuous rolling is carried out, and the finished product is rolled hard coil. The cold work hardening caused by continuous cold deformation increases the strength, hardness and toughness and plastic index of rolled hard coil. , so the stamping performance will deteriorate and can only be used for parts with simple deformation. Hard-rolled coils can be used as raw material for hot-dip galvanizing plants, because hot-dip galvanizing lines are equipped with annealing lines. The weight of the rolled hard coil is generally 6~13.5 tons, and the hot-rolled pickled coil is continuously rolled at normal temperature. The inner diameter is 610mm. 3.What are the relevant standards for cold rolled steel? GB905: Cold rolled round steel, square steel, hexagonal steel GB708: Cold rolled steel sheet and strip (1)Grade DC01、 DC02、 DC03、DC04、SPCC、SPCD、SPCE (2)Supply Standard GB/T 708,EN 10130:1998,JISG3141:2005 (3)Product Size (mm) Nominal thickness:0.3～3.0 Nominal width:20～1600 (4)Use Parts suitable for deep drawing of general forming knives songshunmoldsteel41404340

Minimum Order: 1 bags

1.Forging DIN 1.7225 Steel Product 4140 steel is a kind of alloy structural steel. It belongs to the steel with the American grade equivalent to the 42CrMo grade in my country. This kind of steel belongs to the medium hardenability steel with high yield, good comprehensive mechanical properties, good strength, good toughness and hardenability. High advantages, its carbon content is 0.33%-0.48%, its tensile strength is 795 MPa, and its hardness is 241HB. After heat treatment at 4140, it has good strength and good comprehensive mechanical properties, and it has good manufacturability. Fasteners, salvage tools,etc. 2.Forging DIN 1.7225 Steel Corresponding Steel Number: China GB steel number 42CrMo, Germany DIN steel number 42CrMo4, Germany DIN material number 1.7225, French NF standard 40CD4/42CD4, Japanese JIS standard SCM440, British BS standard 708M40/708A42/709M40, American AISI/ASTM 4140, American SAE 4140, American UNS Standard G41400 (4140 alloy structural steel, executive standard: ASTM A29/A29M-04) 3.Forging DIN 1.7225 Steel Application: It is used to manufacture forgings that require higher strength and larger quenched and tempered section than 35CrMo steel, such as large gears for locomotive traction, supercharger transmission gears, rear axles, connecting rods and spring clips that are heavily loaded, and can also be used for Drill pipe joints and fishing tools for oil wells below 2000m, and can be used for molds of bending machines,etc. We provide high-quality steel, ex-factory price, support customization, strong company and factory strength; welcome your inquiry and order;please contact us for quotes.​songshunmoldsteel41404340

Minimum Order: 3 bushels

Product name AISI/ASTM 4140 Steel Bars Hot Rolled AISI/ASTM 4140 Steel Bars Products keyword AISI/ASTM 4140 Steel Bars Standard AISI/ASTM/DIN/NF/JIS/GB/BS Steel Grade AISI 4140/ASTM 4140/DIN 1.7225 /NF 40CD4 /JIS SCM440 /GB 42CrMo /BS 708M40 Chemical Compositions(%) C:0.38-0.45   Si:0.17-0.37  Mn:0.50-0.80

Minimum Order: 1 bags

1.AISI 4140 Product Details ·keyword:Alloy 4140 Plate  ·Usage:It is used to manufacture forgings that require higher strength and larger quenched and tempered sections than 35CrMo steel, such as large gears for locomotive traction, supercharger transmission gears, rear axles, connecting rods and spring clips that are heavily loaded, and can also be used for Drill pipe joints and fishing tools for oil wells below 2000m, and can be used for molds of bending machines, etc. ·Other Steel Types:5140 /4140 / 4340 / 4142 / 15CrMo / 6150 / 38CrMoAI / 8620 ..... ·Serve:OEM/ODM,Sample free and 24 hours online ·Delivery status:With heat treatment (normalized, annealed or high temperature tempered) or without heat treatment Goods, the delivery status should be specified in the contract 2.SAE 4140 Steel Equivalent Steel Grade  China GB steel number 42CrMo, Germany DIN steel number 42CrMo4, Germany DIN material number 1.7225, French NF standard 40CD4/42CD4, Japanese JIS standard SCM440, British BS standard 708M40/708A42/709M40, American AISI/ASTM 4140, American SAE 4140, American UNS Standard G41400 (4140 alloy structural steel, executive standard: ASTM A29/A29M-04) 3.AISI 4140 Chemical Composition C:0.38-0.45 Si:0.17-0.37 S：≤0.035 P:≤0.035 Mn:0.50-0.80 Cr:0.90-1.20 Mo:0.15-0.25 Ni:≤0.30 Cu≤0.30 4.SAE 4140 Mechanical Properties Tensile strength σb (MPa): ≥1080(110) Yield strength σs (MPa): ≥930(95) Elongation δ5 (%): ≥12 Area shrinkage ψ (%): ≥45 Impact energy Akv (J): ≥63 Impact toughness value αkv (J/cm2): ≥78(8) Hardness: ≤217HB Sample size: sample blank size is 25mm 5.ASTM 4140 Surface Treatment and Heat Treatment 1.Surface Treatment Plate:Origin Black,Orign cold rolled bright,Machined,Grinded Bar:Origin Black,Orign cold rolled(drawn) bright,Turned,Peeled,Grinded 2.Heat treatment specification Heat treatment standard: quenching at 850℃, oil cooling; tempering at 560℃, water cooling, oil cooling; 6.4140 Steel Applications It is used to manufacture forgings that require higher strength and larger quenched and tempered sections than 35CrMo steel, such as large gears for locomotive traction, supercharger transmission gears, rear axles, connecting rods and spring clips that are heavily loaded, and can also be used for Drill pipe joints and fishing tools for oil wells below 2000m, and can be used for molds of bending machines,etc.    7.Company Introduction  Dongguan Songshun Mould Steel Co., Ltd. is an Indusrtial and trading company with 2 warehouses that manufactures good & high quality kinds of steels starting from 2012. The company provides the customized products and OEM service. What´s more, we keep the mass stock of over 20000 tons. In those years, we offer a wide range of steels to our customers from all over the world. And we enjoy high praise among them.                  8.FAQ Q:Are you a factory or a trading company? A: The fact is that we are a company. We have own factory and several warehouses. Under the trend of globalization of the world, we established a professional foreign trade department to change the world. Q: What is your delivery date? A: The delivery date is about 10-30 days after receipt of payment. Q: Can I get some samples? A: We are honored to offer you samples. Q: What port do you usually ship from? A: We have 3 common ports,Tianjin, Shanghai and Shen. Q: What is the payment terms? A: T/T is our priority, L/C is also OK for us. 9.Contact us Feel free to contact us,we are glad to serve for you. Songshun Always Open the Door for You. MiKi Zhuo Skype/Whatsapp/Wechat:+86-18269260283 A , DD:No.4 Dongda Street, Shatou, Changan Town, Dongguan City, Guangdong Province, P.R.C China For more 4140 steel product information, please click this link: https://steelpurchase.com/4140-scm440-172 , 25-steel/ songshunmoldsteel41404340

Minimum Order: 1 bags

Simply put, steel is an iron-carbon alloy with a carbon content of more than 0.025% and less than 2.11%. Steel is a material of a certain shape, size and performance made of steel ingots, billets or steel through pressure processing. Most steel processing is through pressure processing, which plastically deforms the processed steel (bill, ingot, etc.). According to the different processing temperature of steel, it can be divided into cold working and hot working. The chemical composition of steel can vary greatly, and steel containing a small amount of manganese, phosphorus, silicon, sulfur and other elements, and carbon content less than 1.7% is called carbon steel ; Different alloys contain different alloying elements, such as: manganese, nickel, vanadium and so on. The application and research of steel has a long history, but until the invention of the Bainite steelmaking method in the 19th century, the production of steel was a high-cost and low-efficiency work. Today, steel is one of the most used materials in the world due to its low price and reliable performance. It is an indispensable component in the construction industry, manufacturing industry and people's daily life. It can be said that steel is the material basis of modern society.songshunmoldsteel41404340

Minimum Order: 2 barrels

Forged 4340 Alloy Round Bar High strength Forged 4340 Alloy Round Bar Steel Steel Grade:Forged 4340 Alloy Round Bar   Standard: AISI/ASTM/DIN/NF/JIS/GB/BS Pla , ce of Origin:Guangdong, China      Brand Name:Songshun Model Number:4340/40CrNiMoA/G43400/36CrNiMo4/1.6511/SCM4 , 39/40NCD3/816M40 Application:Die Steel Bar              Special Use:Mold Steel Tolerance:±10%                     Shape:Ro , und bars/Flat bar/Plate Delivery Time:8-14 days             Heat treatment:Annealing/Q+T Processing Service:Bending, Welding, Decoiling, Cutting, Punching Technology:Hot Rolled/Forged/Clod Drawn Surface treatment:Black/Peeling/Polishing/Machined Deli , very condition:Hot rolled or forged/ Peeled or black surface/annealed or QT Test:UT100%/Elements testing Certificate:ISO/Mill certificate Service:Sample free and 24 hours online Experience:Ten years manufacturer experience Company Strength  After more than ten years of development and growth, Songshun Iron and Steel has become a comprehensive special steel production enterprise, inventory enterprise and export enterprise. With an experienced export team and professional technical knowledge, Songshun Steel provides customers with technical advice and support, as well as global professional steel solutions and services. With satisfactory and reliable quality and professional services, the company's markets are all over the world, such as Colombia, Chile, Spain, Turkey, Iran, Vietnam, Malaysia, United Arab Emirates, Canada, Brazil, Mexico, etc. Welcome To Get a Quote MiKi Zhuo Skype/Whatsapp/Wechat:+86-18269260283 A , DD:No.4 Dongda Street, Shatou, Changan Town, Dongguan City, Guangdong Province, P.R.C China Company website: https://steelpurchase.com/ http://w , ww.songshunsteel.com/ songshunmoldsteel41404340 ,

Minimum Order: 1 bags

Galvanizing refers to the surface treatment technology that coats a layer of zinc on the surface of metal, alloy or other materials to play the role of beauty and rust prevention. The main method used is hot-dip galvanizing. Zinc is soluble in acid and alkali, so it is called amphoteric metal. Zinc hardly changes in dry air. In humid air, a dense basic zinc carbonate film is formed on the zinc surface. In the atmosphere containing sulfur dioxide, hydrogen sulfide and marine, the corrosion resistance of zinc is poor, especially in the atmosphere containing organic acid at high temperature and high humidity, the zinc coating is easily corroded. The standard electrode potential of zinc is -0.76V. For the steel substrate, the zinc coating is an anodic coating, which is mainly used to prevent the corrosion of steel, and its protective performance has a great relationship with the thickness of the coating. The protective and decorative properties of zinc coating can be significantly improved after passivation treatment, dyeing or coating with light protectant. Product Name Galvanized Steel Coil DX51D Standard EN10147, EN10142, DIN 17162, JIS G3302, ASTM A653 Steel Grade Dx51D, Dx52D, Dx53D, DX54D, S220GD, S250GD, S280GD, S350GD, S350GD,S550GD; SGCC, SGHC, SGCH, SGH340, SGH400, SGH440, SGH490,SGH540, SGCD1, SGCD2, SGCD3, SGC340, SGC340 , SGC490, SGC570; SQ CR22 (230), SQ CR22 (255), SQ CR40 (275), SQ CR50 (340), SQ CR80(550), CQ, FS, DDS, EDDS, SQ CR33 (230), SQ CR37 (255), SQCR40 (275), SQ CR50 (340), SQ CR80 (550); or As Requirement Type Coil/Sheet/Plate/Strip M , aterial CGCC/SGCH/G350/G450/G550/DX51D/DX52D/DX , 53D Thickness 0.12mm-4.0mm or 0.8mm/1.0mm/1.2mm/1.5mm/2.0mm Width 600mm-15 , 00mm or 914mm/1000mm/1200mm/1219mm/1220mm Zinc Coating Z30g/m2-Z350g/m2 Surface Structure Normal spangle coating(NS), minimized spangle coating(MS), spangle-free(FS) Coil Weight 3 Tons -8Tons Technique Cold rolled and Hot rolled Spangle Zero spangle,Mini spangle,Regular spangle,Big spangle