Material Name: Alloy structural steel
Grade: 25Cr2MoV
● Features and Scope:
The manufacture of various kinds of steel fastening bolt. Has good mechanical properties and process performance, general use after quenching. For the manufacture of fastening bolts.
● Chemical Composition:
Carbon C: 0.22 ~ 0.29
Si Si: 0.17 ~ 0.37
Mn Mn: 0.40 ~ 0.70
Sulfur S: ≤0.035
Phosphorus P: ≤0.035
Chromium Cr: 1.50 ~ 1.80
Vanadium V: 0.15 ~ 0.30
Mo Mo: 0.25 ~ 0.35
● Mechanical Properties:
Tensile strength σb (MPa): 1090
Yield strength σs (MPa): 1042
Elongation δ5 (%): 18
Reduction of ψ (%): 63
Impact toughness αku (J / cm2): 213
Hardness: 308HB
Sample size: a sample
● Heat treatment and microstructure specifications:
Heat treatment specifications: 890 ℃, 30min, oil quenched; 670 ℃, 60min, tempering, air-cooled.
Microstructure: sorbite.