Dongguan Songshun Mould Steel Co., Ltd.

4140 Alloy Structual Steel |4140 Alloy Structual Steel Properties | High Hardenability 4140 Alloy Structual Steel Round Bar 1.AISI 4140 Product Details · keyword:4140 alloy structual steel,aisi 4140 steel price,4140 · 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  3.AISI 4140 Chemical Composition C 0.38-0.45% Cr 0.90-1.20% Si 0.17-0.37% Mo 0.15-0.25% Mn 0.50-0.80% Ni ≤0.30% P ≤0.035% S ≤0.035% 4.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 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.