Good translation Metal Products (Shanghai) alloy structural steel companies (domestic alloy steel / alloy steel imports) 38CrSi alloy structural steel / 38CrSi steel / 38CrSi steel bar / 38CrSi Coil / 38CrSi steel / 38CrSi pipe / 38CrSi wire (good Translation Metal Products (Shanghai) Co., Ltd.) 
 38CrSi, alloy structural steel. Unified digital code: A21382 
 Standard: GB / T 3077-1988 
 Physical properties 
 Chemical composition 
 (Wt) (%) 
 Carbon C: 0.35 ~ 0.43 
 Si Si: 1.00 ~ 1.30 
 Manganese Mn: 0.30 ~ 0.60 
 Sulfur S: to allow the residual content of ≤ 0.035 
 Phosphorus P: allow the residual content ≤ 0.035 
 Chromium Cr: 1.30 ~ 1.60 
 Ni: to allow the residual content of ≤ 0.030 
 Copper Cu: to allow the residual content ≤ 0.030 
 Mechanical properties 
 Blank sample size (mm): 25 
 Heat treatment: 
 The first quenching temperature (℃): 900; Coolant: Oil 
 Second quenching temperature (℃): - 
 Tempering heating temperature (℃): 600; coolant: water, oil 
 Tensile strength σb (MPa): ≥ 980 (100) 
 Yield strength σs (MPa): ≥ 835 (85) 
 Elongation δ5 (%): ≥ 12 
 Reduction of area ψ (%): ≥ 50 
 Impact energy Akv (J): ≥ 55 
 Impact toughness αkv (J/cm2): ≥ 69 (7) 
 Brinell hardness (HBS100/3000) (annealing or tempering condition): ≦ 255 
 Delivery status: to heat treatment (normalizing, annealing, or tempering) or heat treatment delivery, delivery status should be indicated in the contract. 
 38crsi Overview 
 Key Features 
 This is a high strength, moderate toughness of steel, its hardenability slightly better than 40Cr in the critical oil quenching diameter 25 ~ 83.5mm; steel cutting still be good, but the tendency to temper brittleness when heat treatment and cold plastic deformation is low, poor welding. 
 Application examples 
 This steel is usually used after quenching and tempering, the general in order to create a diameter of 30 ~ 40mm and demanding parts. Such as axes, spindle, the tractor into the valve, the internal combustion engine oil pump gear and other requirements of high strength and wear-resistant parts; also produce cold shock tools, such as rivets, machine pressed top. 
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 (Good translation Metal Products (Shanghai) Co., Ltd. published) 
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