适用于制造高压及以上压力蒸汽锅炉和管道。
●尺寸公差
标准 |
外径公差 |
厚壁公差` |
|||
GB 5310-2008 |
D<54 |
±0.40mm |
S<4mm |
±0.45 |
|
54~325 |
S≤35 |
±0.75%D |
4-20mm |
+15/-12.5% |
|
S>35 | ±1%D |
S≥20mm |
±12.5% |
||
>325 | ±1%D | 全部 | +20%S~-10%S |
●力学性能
标准 |
钢级 |
抗拉强度(MPa) |
屈服强度(MPa) |
延伸率 |
|
纵向≥
|
横向≥ |
||||
GB 5310-2008 |
20G |
410~550 |
245
|
24
|
22 |
20MnG | 415~560 | 240 | 22 | 20 | |
20MoG | 415~665 | 220 | 22 | 20 | |
15CrMoG | 440~640 | 295 | 21 | 19 | |
12Cr1MoVG | 470~600 | 255 | 21 | 19 | |
07Cr19Ni10 | ≥515 | 205 | 35 | ||
07Cr25Ni21NbN(HR3C) | ≥655 | 295 | 30 |
●化学成分 (%):
标准 |
牌号 |
C |
Si |
Mn |
P≤ |
S≤ |
Nb≤ |
Ni≤ |
Cr≤ |
Mo≤ |
N |
V≤ |
GB 5310-2008 |
20G |
0.17~0.23 |
0.17~0.37 |
0.35~0.65 |
0.025 |
0.015 |
/ |
0.25 |
0.15 |
/ |
|
/ |
20MnG |
0.17~0.23 |
0.17~0.37 |
0.70~1.00 |
0.025 |
0.015 |
/ |
/ |
/ |
/ |
|
/ |
|
20MoG |
0.15~0.25 |
0.17~0.37 |
0.40~0.80 |
0.025 |
0.015 |
/ |
/ |
/ |
0.44~0.65 |
|
/ |
|
15CrMoG |
0.12~0.18 |
0.17~0.37 |
0.40~0.70 |
0.025 |
0.015 |
/ |
/ |
0.80~1.10 |
0.40~0.55 |
|
/ |
|
12Cr1MoVG |
0.08~0.15 |
0.17~0.37 |
0.40~0.70 |
0.025 |
0.015 |
/ |
/ |
0.90~1.20 |
0.25~0.35 |
|
0.15~0.30 |
|
07Cr19Ni10 |
0.04~0.10 |
≤0.75 |
≤2.0 |
0.030 |
0.015 |
/ |
8.00~11.00 |
18.00~20.00 |
|
|
|
|
07Cr25Ni21NbN(HR3C) |
0.04~0.10 |
≤0.75 |
≤2.0 |
0.030 |
0.015 |
0.20~0.60 |
19.00~22.00 |
24.00~26.00 |
/ |
0.150~0.350 |
/ |
关键词:锅炉管、高压锅炉用钢管、20G钢管、20G无缝钢管、15CrMoG无缝钢管、12Cr1MoVG无缝钢管、HR3C