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| 鋼管種類(lèi) | 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% | 
| 標準 | 牌號 | 抗拉強度(MPa) | 屈服強度(MPa) | 伸長(cháng)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 | 
| 標準 | 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 | 抗拉強度(MPa) | 屈服強度(MPa) | 伸長(cháng)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 | |||
| 標準 | 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(yíng)業(yè)務(wù):無(wú)錫厚壁鋼管,江蘇合金管,江蘇鋼管廠(chǎng),無(wú)錫無(wú)縫管,無(wú)錫高壓鍋爐管
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