鍋爐用無縫鋼管
執行標準：
GB3087（2008） —— 低中壓鍋爐用無縫鋼管(國標）
GB5310 （2008）—— 高壓鍋爐用無縫鋼管（國標）
ASTM A106 —— 高溫用無縫碳鋼公稱管（美標）
化學成分:
| 標準 |
牌號 |
化學成分（%） |
| C |
Si |
Mn |
P |
S |
Cr |
Mo |
Cu |
Ni |
V |
Alt |
W |
Nb |
N |
| GB3087 |
10 |
0.07～0.13 |
0.17～0.37 |
0.38～0.65 |
≤0.030 |
≤0.030 |
0.3～0.65 |
|
≤0.25 |
≤0.30 |
|
|
|
|
|
| 20 |
0.17～0.23 |
0.17～0.37 |
0.38～0.65 |
≤0.030 |
≤0.030 |
0.3～0.65 |
|
≤0.25 |
≤0.30 |
|
|
|
|
|
| GB5310 |
20G |
0.17～0.23 |
0.17～0.37 |
0.35～0.65 |
≤0.025 |
≤0.015 |
≤0.25 |
≤0.15 |
≤0.20 |
≤0.25 |
≤0.08 |
|
|
|
|
| 20MnG |
0.17～0.23 |
0.17～0.37 |
0.70～1.00 |
≤0.025 |
≤0.015 |
≤0.25 |
≤0.15 |
≤0.20 |
≤0.25 |
≤0.08 |
|
|
|
|
| 25MnG |
0.23～0.27 |
0.17～0.37 |
0.70～1.00 |
≤0.025 |
≤0.015 |
≤0.25 |
≤0.15 |
≤0.20 |
≤0.25 |
≤0.08 |
|
|
|
|
| 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 |
≤0.20 |
≤0.30 |
|
|
|
|
|
| 12Cr2MoG |
0.08～0.15 |
≤0.50 |
0.40～0.60 |
≤0.025 |
≤0.015 |
2.00～2.50 |
0.90～1.13 |
≤0.20 |
≤0.30 |
|
|
|
|
|
| 12Cr1MoVG |
0.08～0.15 |
0.17～0.37 |
0.40～0.70 |
≤0.025 |
≤0.010 |
0.90～1.20 |
0.25～0.35 |
≤0.20 |
≤0.30 |
0.15～0.30 |
|
|
|
|
| 10Cr9Mo1VNbN |
0.08～0.12 |
0.20～0.50 |
0.30～0.60 |
≤0.020 |
≤0.010 |
8.00～9.50 |
0.85～1.05 |
≤0.20 |
≤0.40 |
0.18～0.25 |
≤0.020 |
|
0.06～0.10 |
0.03～0.07 |
| ASTM A106 |
A106B |
0.17～0.25 |
≥0.1 |
0.70～1.00 |
≤0.030 |
≤0.030 |
|
|
|
|
|
|
|
|
|
| A106C |
0.23～0.27 |
≥0.1 |
0.70～1.00 |
≤0.030 |
≤0.030 |
|
|
|
|
|
|
|
|
|
注：Alt指全鋁含量
20G鋼中Alt不大于0.015%，不作交貨要求，但應填入質量證明書中
力學性能：
| 標準 |
牌號 |
抗拉強度（MPa） |
屈服強度（MPa） |
伸長率（％） |
沖擊功（J） |
硬度 |
| GB3087 |
10 |
335～475 |
≥195 |
≥24 |
|
|
| 20 |
410～550 |
≥245 |
≥20 |
|
|
| GB5310 |
20G |
410～550 |
≥245 |
≥24 |
≥35 |
|
| 20MnG |
≥415 |
≥240 |
≥22 |
≥35 |
|
| 25MnG |
≥485 |
≥275 |
≥20 |
≥35 |
|
| 15CrMoG |
440～640 |
≥235 |
≥21 |
≥35 |
|
| 12Cr2MoG |
450～600 |
≥280 |
≥20 |
≥35 |
|
| 12Cr1MoVG |
470～640 |
≥255 |
≥21 |
≥35 |
|
| 10Cr9Mo1VNbN |
≥585 |
≥415 |
≥20 |
≥35 |
|
| ASTM A106 |
A106B |
≥415 |
≥240 |
≥22 |
≥35 |
|
| A106C |
≥485 |
≥275 |
≥20 |
≥35 |
|
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|
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