GB/T5312船舶用無(wú)縫鋼管執(zhí)行標(biāo)準(zhǔn)
|
縱向力學(xué)性能 |
|
類(lèi)別 |
綱級(jí) |
抗拉強(qiáng)度(MPa) |
屈服點(diǎn)(MPa)≥ |
延伸率（%）≥ |
|
碳鋼和碳錳鋼 |
360 |
360-480 |
215 |
24 |
|
410 |
410-530 |
235 |
22 |
|
490 |
490-610 |
285 |
21 |
|
1Cr0.5Mo |
440 |
440-600 |
275 |
22 |
|
2.25Cr1Mo |
410 |
410-560 |
235 |
20 |
|
490 |
490-640 |
275 |
16 |
|
尺寸公差 |
|
外徑(D) |
≤159 |
>159 |
|
外徑允許偏差 |
±1.0%(最小為±0.5mm) |
±1.25% |
|
壁厚(S) |
≤20 |
S>20 |
D≥351 |
|
壁厚允許偏差 |
+15%,-10%(最小為+0.45mm,-0.30mm) |
±10% |
±15% |
|
化學(xué)成份 |
|
分類(lèi) |
鋼級(jí) |
C |
Si |
Mn |
P≤ |
S≤ |
Cr |
Mo |
Ni |
Cu |
Sn |
W |
總量 |
|
碳鋼和碳錳鋼 |
360 |
≤0.17 |
≤0.35 |
0.40-0.80 |
0.040 |
0.040 |
≤0.25 |
≤0.10 |
≤0.30 |
≤0.30 |
- |
- |
≤0.70 |
|
410 |
≤0.21 |
≤0.35 |
0.40-1.20 |
0.040 |
0.040 |
≤0.25 |
≤0.10 |
≤0.30 |
≤0.30 |
- |
- |
≤0.70 |
|
440 |
≤0.23 |
≤0.35 |
0.80-1.50 |
0.040 |
0.040 |
≤0.25 |
≤0.10 |
≤0.30 |
≤0.30 |
- |
- |
≤0.70 |
|
1Cr0.5Mo |
440 |
0.10-0.18 |
0.10-0.35 |
0.40-0.70 |
0.040 |
0.040 |
0.70-1.10 |
0.45-0.65 |
≤0.30 |
≤0.25 |
≤0.03 |
≤0.020 |
- |
|
2.25Cr1Mo |
410 |
0.08-0.15 |
0.10-0.35 |
0.40-0.70 |
0.040 |
0.040 |
2.00-2.50 |
0.90-1.20 |
≤0.30 |
≤0.25 |
≤0.03 |
≤0.020 |
- |
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電話:0510-88226661
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