Good translation Metal Products (Shanghai) alloy structural steel companies (domestic alloy steel / alloy steel imports) 20crnimoA alloy structural steel / 20crnimoA steel / 20crnimoA steel bar / 20crnimoA Coil / 20crnimoA steel / 20crnimoA pipe / 20crnimoA wire (good Translation Metal Products (Shanghai) Co., Ltd.) 
 China: GB / T 3077-1999 (20CrNiMoA) 
 International Organization for Standardization: ISO 683-11 1987 E (20NiCrMo2 20NiCrMoS2) 
 United States: ASTM A29-1993a (8615 8617 8620 8622) 
 Japan: JIS G4103-1979 (SNCM220) 
 Material Name: Alloy Steel 
 Grade: 20CrNiMoA 
 Standard: GB / T 3077-1999 
 Chemical composition 
 Carbon C: 0.17 ~ 0.23 
 Si Si: 0.17 ~ 0.37 
 Manganese Mn: 0.60 ~ 0.95 
 Sulfur S: to allow the residual content of ≤ 0.035 
 Phosphorus P: allow the residual content ≤ 0.035 
 Chromium Cr: 0.40 ~ 0.70 
 Ni-Ni: 0.35 ~ 0.75 
 Copper Cu: to allow the residual content ≤ 0.030 
 Mo Mo: 0.20 ~ 0.30 
 Mechanical properties 
 Tensile strength σb (MPa): ≥ 980 (100) 
 Yield strength σs (MPa): ≥ 785 (80) 
 Elongation δ5 (%): ≥ 9 
 Reduction of area ψ (%): ≥ 40 
 Impact energy Akv (J): ≥ 47 
 Impact toughness αkv (J/cm2): ≥ 59 (6) 
 Hardness: ≤ 197HB 
 Sample size: Sample size is 15mm rough 
 Heat treatment 
 Standard heat treatment: quenching 850 ℃, oil cooling; tempering 200 ℃, air-cooled. 
 Delivery status: to heat treatment (normalizing, annealing, or tempering) or heat treatment delivery, delivery status should be indicated in the contract. 
 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. 
 Customers ordering materials, customers need to sample pieces of note, the MOQ: 50KG from (包邮) quantity excellent price, please call to order this material, our commitment to: quality assurance! Excellent and inexpensive price! Honesty! 

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