Steel Round Bars

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

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

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

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

Steel rebar are mainly subjected to tensile stress in concrete. The deformed steel bar has a greater bonding ability with concrete due to the action of the ribs, and thus can better withstand the external force. Rebar is widely used in various building structures. Especially large, heavy, lightweight thin-walled and high-rise buildings. Product name Deformed Steel Rebars,Rebar Material Q195, Q235, Q345; ASTM A53 GrA,GrB; STKM11,ST37,ST52, 16Mn,etc. Size 6mm,8mm,10mm, 12mm, 14mm, 16mm, 20mm, 22mm, 25mm, 30mm, 32mm, 40mm,50mm Length 5m-14m,5.8m,6m,10m-12m,12m or as customer's actual reques Standard BS4449-2005,GB1449.2-2007,JIS G3112-2004, ASTM A615-A615M-04a Grade Grade A, Grade B, Grade C Section Shape Spiral Shap,Herringbone Shap,Crescent Shap Technique Steel Rebar Iron Rod Packing Bundle, or with all kinds of colors PVC or as your requirements Ends Plain end/Beveled,protected by plastic caps on both ends, cut quare,grooved,threaded and coupling,etc. Surface Treatment 1. Galvanized 2. PVC,Black and color painting 3. Transparent oil,anti-rust oil 4. According to clients requirement Delivery time Usually within 15 days after receipt of advance payment

We are one of the preeminent dealers of MS Round Bars and provide a wide range of M.S. Round Bar in the industry. Round Bars find their usage in forging industries, bright bar industries, auto-ancillaries, for fabrication, foundation and anchor bolts. Feature Easy to carry Perfect finish Durability

Minimum Order: 16 pieces