管線用無縫鋼管B、X42、X52、X60、X65、X70力學性能化學成分
標準:
API SPEC 5L——美國石油學會標準
GB/T9711.2——中國國家標準
用途:
用于石油、天然氣工業中的氧、水、油輸送管
主要生產鋼管牌號:
B、X42、X52、X60、X65、X70
尺寸公差:
鋼管種類 |
鋼管外徑(D) |
鋼管壁厚(S) |
管體 |
鋼管外徑 (mm) |
允許偏差(mm) |
鋼管外徑(mm) |
允許偏差(mm) |
≥60.3且S<20 |
±0.75% |
≤73.0 |
+15%,-12.5% |
≥60.3且S≥20 |
±1.00% |
>73.0且S<20 |
+15%,-12.5% |
|
|
>73.0且S≥20 |
+17.5%,-10 |
力學性能:
標準 |
牌號 |
抗拉強度(MPa) |
屈服強度(MPa) |
屈強比 |
伸長率(%) |
0℃沖擊功
Akv(J) |
熱處理狀態 |
API SPEC 5L
GB/T9711.2 |
B |
≥415 |
245~440 |
≤0.80 |
22 |
≥40 |
正火 |
X42 |
≥415 |
290~440 |
≤0.80 |
21 |
≥40 |
正火 |
X52 |
≥460 |
360~510 |
≤0.85 |
20 |
≥40 |
正火 |
X60 |
≥520 |
415~565 |
≤0.85 |
18 |
≥40 |
正火 |
X65 |
≥535 |
450~570 |
≤0.90 |
18 |
≥40 |
淬火+回火 |
X70 |
≥570 |
485~605 |
≤0.90 |
18 |
≥40 |
淬火+回火 |
化學成分:
標準 |
牌號 |
化學成分(%) |
CEV(%) |
C |
Si |
Mn |
P |
S |
V |
Nb |
Ti |
API SPEC 5L
GB/T9711.2 |
B |
≤0.16 |
≤0.40 |
≤1.10 |
≤0.020 |
≤0.010 |
- |
- |
- |
≤0.42 |
X42 |
≤0.17 |
≤0.40 |
≤1.20 |
≤0.020 |
≤0.010 |
≤0.05 |
≤0.05 |
≤0.04 |
≤0.42 |
X52 |
≤0.20 |
≤0.45 |
≤1.60 |
≤0.020 |
≤0.010 |
≤0.10 |
≤0.05 |
≤0.04 |
≤0.45 |
X60 |
≤0.21 |
≤0.45 |
≤1.60 |
≤0.020 |
≤0.010 |
≤0.15 |
≤0.05 |
≤0.04 |
協議 |
X65 |
≤0.16 |
≤0.45 |
≤1.60 |
≤0.020 |
≤0.010 |
≤0.06 |
≤0.05 |
≤0.06 |
≤0.45 |
X70 |
≤0.16 |
≤0.45 |
≤1.70 |
≤0.020 |
≤0.010 |
≤0.06 |
≤0.05 |
≤0.06 |
≤0.45 |
注:
1.0.015%≤Altot<0.06%;N≤0.012%;Al/N≥2/1;Cu≤0.25%;Ni≤0.30%;Cr≤0.30%;Mo≤0.10%
2.V+Nb+Ti≤0.15
3.X60、X65、X70經協商Mo≤0.35%