Good translation Metal Products (Shanghai) alloy structural steel companies (domestic alloy steel / alloy steel imports) 20mnmob alloy structural steel / 20mnmob steel / 20mnmob steel bar / 20mnmob Coil / 20mnmob steel / 20mnmob pipe / 20mnmob wire (good Translation Metal Products (Shanghai) Co., Ltd.) 
 Introduction 
 20MnMoB, alloy structural steel. Unified digital code: A72202 
 Standard: GB / T 3077-1999 
 [Main features] 
 After quenching and tempering good mechanical properties, low temperature impact toughness, hardenability and 12CrNi3A steel similar to the higher fatigue strength and bending strength, good weldability. 
 [Application Examples] 
 Used in place of 20CrMnTi, 12CrNi3 steel heart of the Department of moderate intensity higher load carburized gear and other parts, such as cars, tractor gears and gear load a large machine, but also for the manufacture of piston pin and other parts. 
 Chemical composition 
 [] Chemical composition (mass fraction) (%) 
 Carbon C: 0.16 ~ 0.22 
 Si Si: 0.17 ~ 0.37 
 Manganese Mn: 0.90 ~ 1.20 
 Mo Mo: 0.20 ~ 0.30 
 Boron B: 0.0005 ~ 0.0035 
 Mechanical properties 
 [Mechanical properties] 
 Blank sample size (mm): 15 
 Tensile strength (σb / MPa): ≧ 1080 
 Yield point (σs / MPa): ≧ 885 
 Elongation (δ5 /%): ≧ 10 
 Reduction of (ψ /%): ≧ 50 
 Impact absorbed energy (Aku2 / J): ≧ 55 
 Brinell hardness (HBS100/3000) (annealing or tempering condition): ≦ 207 
 Heat treatment process 
 Heat treatment: 
 The first quenching temperature (℃): 880; Coolant: Oil 
 Second quenching temperature (℃): - 
 Tempering heating temperature (℃): 2000; coolant: oil, air 
 The company offers domestic and imported alloy steel varieties, complete specifications, special specifications can be customized processing. Division I and to provide original certificates, material certificates (chemical mechanical properties) and the like arguments! Please note that request! Users are welcome to inquire Order, the Company will be free shipping! If necessary, other materials, please call us. 
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