C | Si | Mn | P | S | TAl | N | |
熔炼分析 | ≤0.10-0.22 | ≤0.60 | 1.10-1.70 | ≤0.025 | ≤0.015 | ≥0.020 | ---- |
成品分析 | ≤0.08-0.22 | ≤0.66 | 1.00-1.80 | ≤0.030 | ≤0.020 | ≥0.015 | 0.014 |
Cr | Cu | Mo | Nb | Ni | Ti | V | |
熔炼分析 | ≤0.30 | ≤0.18 | ≤0.08 | ≤0.02 | ≤0.30 | 0.03 | 0.02 |
成品分析 | ≤0.35 | ≤0.18 | ≤0.11 | ≤0.03 | ≤0.35 | 0.04 | 0.03 |
牌号 |
厚度 mm |
室温拉伸试验 | 弯曲试验 | -20℃横向冲击试验 | |||
ReH,MPa |
Rm,MPa ≥ |
A,% ≥ |
B=35mm 180° |
AKV,J | |||
表层 | 内部 | ||||||
20MnHR | ≤16 | ≥355 | 510-650 | 21 | D=3a | 21 | 16 |
20MnHR | 16-40 | ≥345 | 510-650 | 21 | D=3a | 21 | 16 |
20MnHR | 40-60 | ≥335 | 510-650 | 21 | D=3a | 21 | 16 |
20MnHR | 60-100 | ≥315 | 490-630 | 20 | D=3a | 21 | 16 |
20MnHR | 100-150 | ≥295 | 480-630 | 20 | D=3a | 21 | 16 |