Chemical composition / mechanical properties of 30CrMnSiA steel plate

1. 30CrMnSiA steel plate has excellent workability, small deformation and good fatigue resistance.

2. Chemical composition of 30CrMnSiA steel plate:
Carbon C: 0.28-0.34
Silicon Si: 0.90-1.20
Manganese Mn: 0.80-1.10
Sulfur S: Allow remaining content ≤0.025
Phosphorus P: Allow remaining content ≤0.025
Chromium Cr: 0.80-1.10
Nickel Ni: Allow remaining content ≤0.030
Copper Cu: Allow remaining content ≤0.025

3. Mechanical properties of 30CrMnSiA steel plate:
Tensile strength σb (MPa): ≥1080(110)
Yield strength σs (MPa): ≥835(85)
Elongation δ5 (%): ≥10
Section shortening rate ψ (%): ≥45
Impact energy Akv (J): ≥39
Impact toughness value αkv (J/cm²): ≥49(5)
Hardness: ≤229HB
Sample size: sample blank size is 25mm

4. Heat treatment standard and metallographic arrangement:
Heat treatment standard: quenching 880℃, oil cooling; tempering 540℃, water cooling, oil cooling.