Good translation Metal Products (Shanghai) alloy structural steel companies (domestic alloy steel / alloy steel imports) 25crmo4 alloy structural steel / 25crmo4 steel / 25crmo4 steel bar / 25crmo4 Coil / 25crmo4 steel / 25crmo4 pipe / 25crmo4 wire (good Translation Metal Products (Shanghai) Co., Ltd.) 
 Material Name: Alloy Steel 
 Grade: 25CrMo4 
 Standard: DIN 
 ● Features and application: 
 High hardenability, no temper brittleness, very good weldability, cold cracking tendency to form small, cutting and cold can be a good strain plasticity. General case hardening in quenched state or used for the manufacture of non-corrosive medium and temperature lower than 250 ℃, the medium containing a mixture of nitrogen and hydrogen in high pressure pipe work and a variety of fasteners, higher carburizing parts such as gears and shafts. 
 ● Chemical Composition: 
 Carbon C: 0.22 ~ 0.29 
 Si Si :0.10-0 .40 
 Manganese Mn: 0.60 ~ 0.90 
 Sulfur S: to allow the residual content of ≤ 0.035 
 Phosphorus P: allow the residual content ≤ 0.035 
 Chromium Cr: 0.90 ~ 1.20 
 Ni: to allow the residual content of ≤ 0.030 
 Copper Cu: to allow the residual content ≤ 0.030 
 Mo Mo: 0.15 ~ 0.30 
 ● Mechanical Properties: 
 Tensile strength σb (MPa): ≥ 885 (90) 
 Yield strength σs (MPa): ≥ 685 (70) 
 Elongation δ5 (%): ≥ 12 
 Reduction of area ψ (%): ≥ 50 
 Impact energy Akv (J): ≥ 78 
 Impact toughness αkv (J/cm2): ≥ 98 (10) 
 Hardness: ≤ 197HB 
 Sample size: Sample size is 15mm rough 
 ● Heat treatment and microstructure specifications: 
 Standard heat treatment: quenching 880 ℃, water, oil cooling; tempering 500 ℃, water-cooled, oil-cooling. 
 ● Delivery status: to heat treatment (normalizing, annealing, or tempering) or heat treatment delivery, delivery status should be indicated in the contract. 
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