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|
壁厚允許偏差 | |||
|
標準 |
壁厚(S) |
壁厚允許偏差 | |
|
GB3087-1999 |
≤20 |
+15%,-12.5%
(最小為+0.45mm,-0.35mm) | |
|
>20 |
±12.5% | ||
|
GB5310-1995 |
<3.5 |
+15%(最小為+0.48mm) | |
|
-10%(最小為+0.32mm) | |||
|
3.5-20 |
+15%,-10% | ||
|
>20 |
D<219 |
±10% | |
|
D≥219 |
+12.5%,-10% | ||
|
外徑允許偏差 | ||
|
標準 |
外徑(D) |
外徑允許偏差 |
|
GB3087-1999 |
≤159 |
±1.0% (最小為±0.5mm) |
|
>159 |
±1.0% | |
|
GB5310-1995 |
≤159 |
±1.0%
(最小為±0.5mm) |
|
>159 |
±1.0% | |
|
縱向力學性能 | |||||
|
標準 |
牌號 |
抗拉強度(MPa) |
屈服點（MPa）≥ |
伸長率（%）≥ |
沖擊功(J)≥ |
|
GB3087-1999 |
10 |
333-475 |
196 |
24 |
- |
|
20 |
392-588 |
245/226 |
20 |
- | |
|
GB5310-1995 |
20G |
410-550 |
245 |
24 |
35 |
|
20MnG |
≥415 |
240 |
22 |
35 | |
|
25MnG |
≥485 |
275 |
20 |
35 | |
|
15MoG |
450-600 |
270 |
22 |
35 | |
|
20MoG |
≥415 |
220 |
22 |
35 | |
|
12CrMoG |
410-560 |
205 |
21 |
35 | |
|
15CrMoG |
440-640 |
235 |
21 |
35 | |
|
12Cr2MoG |
450-600 |
280 |
20 |
35 | |
|
12Cr1MoVG |
470-640 |
255 |
21 |
35 | |
|
12Cr2MoWVTib |
540-735 |
345 |
18 |
35 | |
|
化學成分 | ||||||||||||
|
標準 |
牌號 |
C |
Si |
Mn |
P≤ |
S≤ |
Cr |
Mo |
V |
Ti |
B |
W |
|
GB3087-1999 |
10 |
0.07-0.14 |
0.17-0.37 |
0.35-0.65 |
0.035 |
0.035 |
≤0.15 |
- |
- |
- |
- |
- |
|
20 |
0.17-0.24 |
0.17-0.37 |
0.35-0.65 |
0.035 |
0.035 |
≤0.25 |
- |
- |
- |
- |
- | |
|
GB5310-1995 |
20G |
0.17-0.24 |
0.17-0.37 |
0.35-0.65 |
0.030 |
0.030 |
- |
- |
- |
- |
- |
- |
|
20MnG |
0.17-0.24 |
0.17-0.37 |
0.70-1.00 |
0.030 |
0.030 |
- |
- |
- |
- |
- |
- | |
|
25MnG |
0.22-0.30 |
0.17-0.37 |
0.70-1.00 |
0.030 |
0.030 |
- |
- |
- |
- |
- |
- | |
|
15MoG |
0.12-0.20 |
0.17-0.37 |
0.40-0.80 |
0.030 |
0.030 |
- |
0.25-0.35 |
- |
- |
- |
- | |
|
20MoG |
0.15-0.25 |
0.17-0.37 |
0.40-0.80 |
0.030 |
0.030 |
- |
0.44-0.65 |
- |
- |
- |
- | |
|
12CrMoG |
0.08-0.15 |
0.17-0.37 |
0.40-0.70 |
0.030 |
0.030 |
0.40-0.70 |
0.40-0.55 |
- |
- |
- |
- | |
|
15CrMoG |
0.12-0.18 |
0.17-0.37 |
0.40-0.70 |
0.030 |
0.030 |
0.80-1.10 |
0.40-0.55 |
- |
- |
- |
- | |
|
12Cr2MoG |
0.08-0.15 |
≤0.50 |
0.40-0.70 |
0.030 |
0.030 |
2.00-2.50 |
0.90-1.20 |
- |
- |
- |
- | |
|
12Cr1MoG |
0.08-0.15 |
0.17-0.37 |
0.40-0.70 |
0.030 |
0.030 |
0.90-1.20 |
0.25-0.35 |
0.15-0.30 |
- |
- |
- | |
|
12Cr2MoWVTiB |
0.08-0.15 |
0.45-0.75 |
0.45-0.65 |
0.030 |
0.030 |
1.60-2.10 |
0.50-0.65 |
0.28-0.42 |
0.08-0.18 |
0.002-0.18 |
0.30-0.55 | |