Minerals & Metals

Low alloy steel refers to alloy steel with less than 5% of total alloying elements. Low alloy steel is relative to carbon steel. On the basis of carbon steel, one or several alloying elements are intentionally added to the steel in order to improve the properties of the steel. When the amount of alloy added exceeds the general content of the normal production method of carbon steel, the steel is called alloy steel. When the total amount of alloy is less than 5%, it is called low alloy steel, ordinary alloy steel is generally less than 3.5%, alloy content between 5-10% is called medium alloy steel, and more than 10% is called high alloy steel. China's steel output has exceeded 600 million tons, the quantity of steel is no longer the main contradiction, and the contradiction of unreasonable steel varieties and structure is very prominent. The main task of the current industry is to strive to improve the market competitiveness of products, stand at a new starting point for sustainable development, and make vigorous development of low-alloy steel an important part of the development strategy. Many ordinary steel enterprises have realized that the production of low-alloy steel is the key to improving the technical content and added value of products in the adjustment of the steel variety structure and the preparation of scientific and technological development plans. The management cadres felt that "success is also low-alloy steel, and failure is also low-alloy steel", and they urgently demand a comprehensive understanding of low-alloy steel. The production situation of ordinary low alloy steel in my country can be summarized into the following points: 1. It is low carbon in terms of carbon content, and the carbon content is generally less than 0.20%; 2. In terms of alloys, primary steel and binary steel occupy a large proportion; 3. In terms of supply status, most of them are delivered in hot-rolled state; 4. Many steel grades add rare earth elements to improve the overall performance; 5. Most common low alloy steels are ferrite + pearlite type. Our company Dongguan Songshun Mould Steel Co., Ltd. specializes in the production of alloy steel for more than 10 years, mainly producing various alloy steel products, if you need more price, cooperation or quality information, please notify us jacklu@songshunsteel.com

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

Established in 2009,Songshun Steel supplies a wide range of carbon, alloy and tool steel products, including high speed tool steel, cold work tool steel, hot work tool steel, plastic mould steel, engineering steel and machine structural steel etc. After more than 10 years development and growing, Songshun Steel becomes one comprehensive special steel factory, stockist and exporter. Combined with experienced exporting team and professional technical knowledge, Songshun Steel offers both technical advice and support, as well as global professional steel solution and service. Due to satisfactory reliable quality and professional service, Songshun expands our market worldwide, such as Colombia, Chile, Spain, Turkey, Iran, Vietnam, Malaysia ,UAE, Canada, Brazil, Mexico and so on. We offer a wide range of information and high quality steel products on 4140 and 4340 steel, for more information on our 4140 and 4340 steel products, please contact us today. To discuss pricing details, please request 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 For more 4140 steel product information, please click this link: https://steelpurchase.com/4140-scm440-172 , 25-steel/ songshunmoldsteel41404340

Minimum Order: 2 barrels

With the development of science, technology and industry, higher requirements are put forward for materials, such as higher strength, resistance to high temperature, high pressure, low temperature, corrosion resistance, wear and other special physical and chemical properties. To meet the requirements, alloy steel plates appeared. 1.Alloy Steel Plate Performance Issues With the development of science, technology and industry, higher requirements are put forward for materials, such as higher strength, resistance to high temperature, high pressure, low temperature, corrosion resistance, wear and other special physical and chemical properties. fulfil requirements. The performance of carbon steel mainly has the following shortcomings: (1) Low hardenability Under normal circumstances, the maximum hardenable diameter of carbon steel water quenching is only 10mm-20mm. (2) The strength and yield strength are relatively low. For example, the σs of ordinary carbon steel Q235 steel is 235MPa, while the σs of low alloy structural steel 16Mn is more than 360MPa. The σs/σb of 40 steel is only 0.43, which is much lower than that of alloy steel. (3) Poor tempering stability Due to the poor tempering stability, when carbon steel is quenched and tempered, a lower tempering temperature is required to ensure higher strength, so that the toughness of the steel is low; in order to ensure better Toughness, and the strength is low when the high tempering temperature is used, so the comprehensive mechanical properties of carbon steel are not high. (4) Can not meet the requirements of special properties Carbon steel is often poor in terms of oxidation resistance, corrosion resistance, heat resistance, low temperature resistance, wear resistance and special electromagnetic properties, and cannot meet the needs of special performance properties. 2.The difference between carbon steel and alloy steel plate The performance of carbon steel mainly has the following shortcomings: (1) Low hardenability In general, the maximum hardening diameter of carbon steel water quenching is only 10mm-20mm. (2) The strength and yield strength are relatively low. For example, the σs of ordinary carbon steel Q235 steel is 235MPa, while the σs of low alloy structural steel 16Mn is more than 360MPa. The σs/σb of 40 steel is only 0.43, which is much lower than that of alloy steel. (3) Poor tempering stability Due to the poor tempering stability, when carbon steel is quenched and tempered, a lower tempering temperature is required to ensure higher strength, so that the toughness of the steel is low; in order to ensure better Toughness, and the strength is low when the high tempering temperature is used, so the comprehensive mechanical properties of carbon steel are not high. (4) Can not meet the requirements of special properties Carbon steel is often poor in terms of oxidation resistance, corrosion resistance, heat resistance, low temperature resistance, wear resistance and special electromagnetic properties, and cannot meet the needs of special performance properties. 3.Our Company Established in 2009,Songshun Steel supplies a wide range of carbon, alloy and tool steel products, including high speed tool steel, cold work tool steel, hot work tool steel, plastic mould steel, engineering steel and machine structural steel etc. After more than 10 years development and growing, Songshun Steel becomes one comprehensive special steel factory, stockist and exporter. Combined with experienced exporting team and professional technical knowledge, Songshun Steel offers both technical advice and support, as well as global professional steel solution and service. Due to satisfactory reliable quality and professional service, Songshun expands our market worldwide, such as Colombia, Chile, Spain, Turkey, Iran, Vietnam, Malaysia ,UAE, Canada, Brazil, Mexico and so on. 4.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 Company website: https://steelpurchase.com/ http://w , ww.songshunsteel.com/ 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

1.Alloy Tool Steel Round Bar Alloy tool steel is a type of steel in which chromium, molybdenum, tungsten, vanadium and other alloying elements are added on the basis of carbon tool steel to improve hardenability, toughness, wear resistance and heat resistance. It is mainly used in the manufacture of measuring tools, cutting tools, impact- resistant tools, cold and hot molds and some special-purpose tools. Steel with alloying elements such as Si, Mn, Ni, Cr, W, Mo, and V added to carbon tool steel. The addition of Cr and Mn can improve the hardenability of tool steel, and other elements can be added selectively or at the same time according to requirements (the total amount of addition generally does not exceed 5%), that is, a series of alloy tool steels are formed. 2.Category of use The hardenability, hardenability, wear resistance and toughness of gold tool steel are higher than those of carbon tool steel, and can be roughly divided into three categories: steel for cutting tools, molds and measuring tools. Among them, steels with high carbon content (carbon mass fraction greater than 0.80%) are mostly used to manufacture cutting tools, measuring tools and cold work dies. The hardness of such steels after quenching is above HRC60 and has sufficient wear resistance; steels with moderate carbon content ( Carbon content of 0.35%~0.70%) is mostly used in the manufacture of hot work molds. The hardness of this type of steel after quenching is slightly lower, which is HRC50~55, but the toughness is good. The cutting tool produces strong wear and heat under working conditions, as well as vibration and a certain impact load. Steel for cutting tools should have high hardness, wear resistance, red hardness and good toughness. In order to ensure its high hardness and meet the needs of forming alloy carbides, the carbon content in steel is generally 0.80% to 1.45%. Chromium is the main alloying element of this type of steel, and its mass fraction is generally 0.50% to 1.70%. Some steels also contain tungsten to improve the performance of cutting metals. This type of tool steel contains alloying elements, so the hardenability is better than that of carbon tool steel, the deformation caused by heat treatment is small, and it has high hardness and wear resistance. Commonly used steels are chromium steel, silicon-chromium steel and chromium- tungsten-manganese steel. [Applications]: Mainly used to manufacture low-speed cutting tools (such as woodworking tools, fitter tools, drills, milling cutters, broaches, etc.) and measuring tools (such as calipers, micrometers, block gauges, templates, etc.). Measuring tool steel is required to have high hardness (62-65HRC), high wear resistance, sufficient strength and toughness, and high hot hardness (that is, the cutting tool can still maintain high hardness at high temperature); in order to ensure the accuracy of measurement, measuring tools are required. Cutting tool steel has good dimensional stability. [Chemical composition]: Measuring tool steel has high carbon content, wC=0.8%～ 1.50%, to ensure high hardness and wear resistance. The added alloying elements are Cr, Si, Mn, W, etc., to improve the hardenability, tempering resistance, hot hardness and wear resistance of steel. [Commonly used cutting tool steel]: 9SiCr is a widely used cutting tool steel, which is used to make various thin-edged low-speed cutting tools that require small deformation, such as die, tap, reamer, etc. [Commonly used measuring tool steel]: High-precision measuring tools (such as block gauges) can be made of measuring tool steel such as Cr2, CrWMn, etc., or bearing steel (such as GCr15); simple measuring tools (such as calipers, templates, rulers, gauges, etc.) are multi-purpose Carbon tool steel (such as T10A); for measuring tools that require precision and must prevent corrosion, stainless steel 3Cr13 and 9Cr18 are used. [Heat treatment]: The pre-heat treatment of measuring and cutting tool steel is spheroidizing annealing, and the final heat treatment is quenching and low- temperature tempering. After heat treatment, the hardness reaches 60-65HRC. High precision gauges can be cold treated after quenching to reduce the amount of retained austenite and thus increase their dimensional stability. In order to further improve dimensional stability, aging treatment can also be carried out after quenching and tempering. songshunmoldsteel41404340

Minimum Order: 1 bags

4140 Steel Product Information Steel Grade: 4140 Alloy steel Standard: AISI/ASTM/DIN/NF/JIS/GB/BS Place of Origin:Guangdong, China Brand Name:Songshun Model Number:4140/1.7225/42CrMo Technique:Hot Rolled Application:Die Steel Bar Special Use:Mold Steel Tolerance:±10% Shape:Round 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 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: 1 bags

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

1.Product name JIS SCM440 Steel Mechanical Properties Alloy Structual Steel 2.keyword   SCM440 Steel Mechanical Properties   3.Standard AISI/ASTM/DIN/NF/JIS/GB/BS 4.Steel Grade AISI 4140/ASTM 4140/DIN 1.7225 /NF 40CD4 /JIS SCM440 /GB 42CrMo /BS 708M40 5.Chemical Compositions(%) C: 0.38-0.45   Si: 0.17-0.37  Mn: 0.50 , -0.80  P≤0.035  S ≤0.035   Cr: 0.90-1.20  Mo: 0.15-0.25 6.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 7.Surface treatment Black/Peeling/Polishing/Machined 8.Techniqu , e Cold/Hot rolled, Cold-Drawn or Hot Forged 9.Heat Treatment Annealed; Quenched; Tempered 10.Delivery Condition Hot Rolled or Forged/Peeled or Black Surface/Annealed or QT Heat treatment standard Quenching at 850℃, oil cooling; tempering at 560℃, water cooling, oil cooling 10.Feature This steel has good strength, good toughness, high hardenability, good workability, small processing deformation, quite good fatigue resistance, small deformation during quenching, high creep strength and durable strength at high temperature and so on. 11.Test SGS/UT100%/Elements Testing 12.Certificate SGS/ISO/Mill Certificate 13.Delivery status Delivered in heat-treated (normalized, annealed or high temperature tempered) or unheated state 14.E-mail jacklu@songshunsteel.com 15.Skype/Whatsapp/ , Wechat +86-18269260283 16.Company website https://steelpurchase.com/ http://www.songs , hunsteel.com/ 17.songshunmoldsteel41404340

Minimum Order: 1 bags

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

Heat Treatment 4140 Alloy 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 Heat Treatment 4140 Alloy Steel 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 SAE 4140 Mechanical Properties Tensile Strength σb (MPa):≥1080(110) Yield Strength σS (MPa):≥930(95) Elongation δ5 (%):≥12 Reduction ψ (%):≥45  Impact Energy Akv (J):≥63 Impact Toughness akv (J/cm2):≥78(8) Annealed Hardness ≤217HB Our advantage Focus on the steel industry for more than ten years Strength factory Professional service Quality assurance Customized according to customer requirements Factory price Fast shipping time Good after-sales service Happy to work with customers High repurchase rate, etc. songshunmoldsteel41404340

Minimum Order: 1 bags

Introduction of 4140 4140 steel has high strength, hardenability, good toughness, small deformation during quenching, and high creep strength and durable strength at high temperature. It is used to manufacture forgings requiring higher strength and larger quenched cross section than 35CrMo steel, such as large locomotive traction gear, supercharger transmission gear, rear axle, highly loaded connecting rod and spring clip, and can also be used for oil drilling. Heat treatment: 1. Normalizing: Heat the furnace to 900°C~930°C, keep the thickest cross section per inch at this temperature for one hour, and cool in air. 2. Heat to austenitizing at a temperature of 860℃~885℃, and keep the thickest cross section per inch for one hour at this temperature 3. Normalizing or oil quenching, and cooling to a maximum temperature of 121°C 4. Temper at a temperature that achieves the following mechanical properties. The thickest cross-section per inch is held for one hour at the tempering temperature, and the tempering temperature range is 640 ° C ~ 680 ° C 5. For each heat treatment process, a heat treatment chart must be drawn. 6. The mechanical property test shall be carried out in accordance with the stipulations of ASTM. A-370. The sample material used for the test shall be cut from the test bar of the same furnace steel. The casting or forging represented by the sample and the test bar shall be in the same furnace. The test bar shall be heat treated in the same furnace together with the charge. 7. The mechanical properties should meet the following requirements: (Tested with a test bar, sampling according to APT 6A, 110K standard) - Tensile strength minimum lb/inch (862) Yield strength minimum lb/inch 110.000 (758) 2 inches The minimum value of elongation is 15% and the minimum value of section shrinkage rate is %40. Brinell hardness HB285 ~ take, the casting or forging represented by the sample and the test bar must be in the same furnace, and the test bar should be heat treated in the same furnace together with the charge. 8. The mechanical properties should meet the following requirements: (tested with test bars, sampling according to APT 6A, 110K standard) - minimum tensile strength lbs/inch (862) minimum yield strength lbs/inch (758) 2 inches Minimum elongation %15 Minimum shrinkage of section %40 Brinell hardness HB285～352 9. Marking: Each part shall be printed with heat treatment marks and hardness with low stress steel stamp. Company strength   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. Don't hesitate, here is your best choice! contact us,Latest business news for you!welcome your inquiry and order! songshunmoldsteel41404340

Minimum Order: 4 cubic metres