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鋼管種類 |
外徑(D) |
鋼管壁厚(S) | ||
|
冷拔管 |
鋼管外徑(mm) |
允許偏差(mm) |
鋼管壁厚 (mm) |
允許偏差(mm) |
|
＞30-50 |
±0.3 |
≤30 |
±10% | |
|
＞50-219 |
±0.8% | |||
|
熱軋管 |
＞219 |
±1.0% |
＞20 |
±10% |
|
標(biāo)準(zhǔn) |
牌號 |
抗拉強(qiáng)度(MPa) |
屈服強(qiáng)度(MPa) |
伸長率(%) |
沖擊功(J) |
布氏硬度(HB) |
交貨狀態(tài) |
|
GB9948 |
10 |
330-490 |
≥205 |
≥24 |
/ |
/ |
正火 |
|
20 |
410-550 |
≥245 |
≥21 |
≥39 |
/ |
正火 | |
|
15CrMo |
440-640 |
≥235 |
≥21 |
≥47 |
≤170 |
正火加回火 | |
|
1Cr2Mo |
≥390 |
≥175 |
≥22 |
≥92 |
≤179 |
正火加回火 | |
|
1Cr5Mo |
≥390 |
≥195 |
≥22 |
≥92 |
≤187 |
退火 |
|
標(biāo)準(zhǔn) |
牌號 |
化學(xué)成分 | |||||||
|
C |
Si |
Mn |
P |
S |
Cr |
Mo |
Ni | ||
|
GB9948 |
10 |
0.07-0.14 |
0.17-0.37 |
0.35-0.65 |
≤0.035 |
≤0.035 |
≤0.15 |
/ |
≤0.25 |
|
20 |
0.17-0.24 |
0.17-0.37 |
0.35-0.65 |
≤0.035 |
≤0.035 |
≤0.25 |
/ |
≤0.25 | |
|
15CrMo |
0.12-0.18 |
0.17-0.37 |
0.40-0.70 |
≤0.035 |
≤0.035 |
0.80-1.10 |
0.40-0.55 |
≤0.30 | |
|
1Cr2Mo |
≤0.15 |
0.50-1.00 |
0.30-0.60 |
≤0.035 |
≤0.030 |
2.15-2.85 |
0.45-0.65 |
/ | |
|
1Cr5Mo |
≤0.15 |
≤0.50 |
≤0.60 |
≤0.035 |
≤0.030 |
4.00-6.00 |
0.45-0.60 |
≤ | |
|
外徑 |
壁厚 | ||
|
鋼管尺寸(mm) |
允許偏差 |
鋼管尺寸(mm) |
允許偏差 |
|
≤ 30 |
± 0.20mm |
≤ 3 |
+12 % ,-10 % |
|
> 30～50 |
± 0.30mm |
> 3 |
±12 % |
|
> 50 |
± 0.8% | ||
|
牌號 |
抗拉強(qiáng)度(MPa) |
屈服強(qiáng)度(MPa) |
伸長率(%) |
沖擊功(J) |
布氏硬度(HB) |
交貨狀態(tài) |
|
10 |
330-490 |
≥ 205 |
≥ 24 |
/ |
/ |
正火 |
|
20 |
410-550 |
≥ 245 |
≥ 21 |
≥ 39 |
/ |
正火 |
|
12CrMo |
410-560 |
≥ 205 |
≥ 21 |
≥ 55 |
≤ 156 |
正火加回火 |
|
15CrMo |
440-640 |
≥ 235 |
≥ 21 |
≥ 47 |
≤ 170 |
正火加回火 |
|
1Cr2Mo |
≥ 390 |
≥ 175 |
≥ 22 |
≥ 92 |
≤ 179 |
正火加回火 |
|
1Cr19Ni9 |
≥ 520 |
≥ 205 |
≥ 35 |
/ |
/ |
固溶 |
|
1Cr19Ni11Nb |
≥ 520 |
≥ 205 |
≥ 35 |
/ |
/ |
固溶 |
|
牌號 |
化學(xué)成份 | ||||||||
|
C |
Si |
Mn |
P |
S |
Cr |
Mo |
Ni |
Nb+Ti | |
|
10 |
0.17-0.14 |
0.17-0.37 |
0.35-0.65 |
≤0.035 |
≤0.035 |
≤0.15 |
/ |
≤0.25 |
/ |
|
20 |
0.17-0.24 |
0.17-0.37 |
0.35-0.65 |
≤0.035 |
≤0.035 |
≤0.25 |
/ |
≤0.25 |
/ |
|
12CrMo |
0.08-0.15 |
0.17-0.37 |
0.40-0.70 |
≤0.035 |
≤0.035 |
0.40-0.70 |
0.40-0.55 |
≤0.30 |
/ |
|
15CrMo |
0.12-0.18 |
0.17-0.37 |
0.40-0.70 |
≤0.035 |
≤0.035 |
0.80-1.10 |
0.40-0.55 |
≤0.30 |
/ |
|
1Cr2Mo |
≤ 0.15 |
0.50-1.00 |
0.30-0.60 |
≤0.035 |
≤0.030 |
2.15-2.85 |
0.45-0.65 |
/ |
/ |
|
1Cr19Ni9 |
0.04-0.10 |
≤ 1.00 |
≤ 2.00 |
≤0.035 |
≤0.030 |
18.00-20.00 |
/ |
8.00-11.00 |
/ |
|
1Cr19Ni11Nb |
0.04-0.10 |
≤ 1.00 |
≤ 2.00 |
≤0.035 |
≤0.030 |
17.00-20.00 |
/ |
9.00-13.00 |
≥8C-1.00 |
|
尺寸公差 | |||
|
標(biāo)準(zhǔn) |
尺寸 |
允許偏差 | |
|
GB9948-1988 |
外徑 |
≤159 |
±1.00% |
|
>159 |
±1.25% | ||
|
壁厚 |
≤20 |
±12.5% | |
|
>20 |
±10.0% | ||
公司鋼管主營業(yè)務(wù)：無錫厚壁鋼管，江蘇合金管，江蘇鋼管廠，無錫無縫管，無錫高壓鍋爐管
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