X70直縫鋼管
時(shí)間:2020-08-17 瀏覽:
X70直縫鋼管是管線(xiàn)管,主要應用于石油天然氣輸送建設,X70直縫鋼管規格是57-2200MM ×壁厚3-120mm,X70直縫鋼管概況是每單位承受70的屈服力。
主要生產(chǎn)鋼管牌號:B、X42、X52、X60、X65、X70
鋼管種類(lèi)
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鋼管外徑(D)
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鋼管壁厚(S)
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|
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管體
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鋼管外徑 (mm)
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允許偏差(mm)
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鋼管外徑(mm)
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允許偏差(mm)
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≥60.3且S<20
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±0.75%
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≤73.0
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+15%,-12.5%
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≥60.3且S≥20
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±1.00%
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>73.0且S<20
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+15%,-12.5%
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>73.0且S≥20
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+17.5%,-10
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標準
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牌號
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抗拉強度(MPa)
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屈服強度(MPa)
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屈強比
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伸長(cháng)率(%)
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0℃沖擊功
Akv(J)
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熱處理狀態(tài)
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API SPEC 5L
GB/T9711.2
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B
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≥415
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245~440
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≤0.80
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22
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≥40
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正火
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X42
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≥415
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290~440
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≤0.80
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21
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≥40
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正火
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X52
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≥460
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360~510
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≤0.85
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20
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≥40
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正火
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X60
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≥520
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415~565
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≤0.85
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18
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≥40
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正火
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X65
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≥535
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450~570
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≤0.90
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18
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≥40
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淬火+回火
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X70
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≥570
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485~605
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≤0.90
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18
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≥40
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淬火+回火
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牌號
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化學(xué)成分(%)
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CEV(%)
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||||||||
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C
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Si
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Mn
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P
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S
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V
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Nb
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Ti |
B
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X42
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≤0.17
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≤0.40
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≤1.20
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≤0.020
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≤0.010
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≤0.05
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≤0.05
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≤0.04
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≤0.42
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X52
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≤0.20
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≤0.45
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≤1.60
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≤0.020
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≤0.010
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≤0.10
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≤0.05
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≤0.04
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≤0.45
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X60
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≤0.21
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≤0.45
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≤1.60
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≤0.020
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≤0.010
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≤0.15
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≤0.05
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≤0.04
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協(xié)議
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X65
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≤0.16
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≤0.45
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≤1.60
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≤0.020
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≤0.010
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≤0.06
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≤0.05
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≤0.06
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≤0.45
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X70
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≤0.16
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≤0.45
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≤1.70
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≤0.020
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≤0.010
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≤0.06
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≤0.05
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≤0.06
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≤0.45
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