型号 |
牌号 |
化 |
学 |
成 |
分 |
|
C |
Si |
Mn |
P |
S |
||
9 |
16Mn |
0.16~0.20 |
0.30~0.60 |
1.30~1.60 |
≤0.045 |
≤0.050 |
11 |
20MnK |
0.21~0.26 |
0.20~0.60 |
1.20~1.60 |
≤0.045 |
≤0.050 |
12 |
Q275b Q275 |
0.28~0.37 |
≤0.10 0.15~0.35 |
0.50~0.80 |
≤0.045 |
≤0.050 |