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30CrNiMo8 alloy steel plate

Posted:2021-08-31 13:54:38

1. Material description of 30CrNiMo8 steel plate
30CrNiMo8 is an alloy structural steel that can be used as shaft parts, butt joints and gears.

2. Characteristics of 30CrNiMo8 steel plate: it has high yield strength, tensile strength and fatigue strength, as well as plasticity and resistance.

3. Melting analysis of chemical composition of 30CrNiMo8 alloy steel plate:
Carbon C: 0.30 - 0.40
Silicon Si: 0.17 - 0.37
Mn: 0.50 - 0.80
Sulfur S: ≤ 0.020
Phosphorus P: ≤ 0.025
Cr: 1.10 - 1.70
Nickel: 2.75 - 3.25
Mo: 0.25 - 0.40

4. Mechanical properties of 30CrNiMo8 steel plate:
Tensile strength σb (MPa)：755-900
Conditional compliance strength σ0.2 (MPa)：590-785
Elongation δ5 (%)：12-14
Section shortening rate ψ (%)： 32-40
Impact resistance value αkv (J/cm2)：32-55
Hardness: 241 - 341HB

5. Heat treatment standard and metallographic arrangement of 30CrNiMo8 alloy steel plate:
Heat treatment standard: 840 - 860℃ oil quenching + 520 - 590℃ tempering, oil cooling.
Metallographic arrangement: 1) martensite after quenching; 2) After quenching and high temperature tempering, it is tempered sorbite.