|
尺寸公差
|
| 标准 |
外径公差 |
壁厚公差 |
| GB/T8162-1999 |
D<50 |
±0.5mm |
S≤4mm |
±12.5% |
| D≥50 |
±1% |
4mm≤20mm |
+15/-12.5% |
| S>20mm |
±12.5% |
|
|
纵向力学性能
|
| 标准 |
纲级 |
抗拉强度(MPa) |
屈服强度(MPa) ≥ |
延伸率(%)≥ |
| ≤16 |
>16-30mm |
|
GB/T8162-1999
|
10 |
335 |
205 |
195 |
24 |
| 20 |
390 |
245 |
235 |
20 |
| 35 |
510 |
305 |
295 |
17 |
| 45 |
590 |
335 |
325 |
14 |
| Q345 |
490 |
325 |
315 |
21 |
|
| 化学成份 |
| 标准 |
牌号 |
C |
Si |
Mn |
P≤ |
S≤ |
Cu≤ |
Ni≤ |
Cr≤ |
Mo≤ |
V≤ |
| GB/T8162-1999 |
10 |
0.07-0.03 |
0.17-0.37 |
0.35-0.65 |
0.035 |
0.035 |
0.25 |
0.30 |
0.15 |
/ |
/ |
| 20 |
0.17-0.23 |
0.17-0.37 |
0.35-0.65 |
0.035 |
0.035 |
0.25 |
0.30 |
0.25 |
/ |
/ |
| 35 |
0.32-0.39 |
0.17-0.37 |
0.50-0.80 |
0.035 |
0.035 |
0.25 |
0.30 |
0.25 |
/ |
/ |
| 45 |
0.42-0.50 |
0.17-0.37 |
0.50-0.80 |
0.035 |
0.035 |
0.25 |
0.30 |
0.25 |
/ |
/ |
| 16Mn |
0.12-0.20 |
0.20-0.60 |
1.20-1.60 |
0.045 |
0.045 |
0.25 |
0.25 |
0.25 |
/ |
/ |
|
