api 5l 钢级性能要求

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1、化学成分析：壁厚t≤25.0mm（0.984in）的PSL1钢管的化学成分钢材等级（钢种名称）熔炼分析和产品分析a质量分数（％）CMnPSVNbTi最大b最大b最小最大最大最大最大最大无缝钢管L175/A250.210.60—0.0300.030———L175P/A25P0.210.600.0450.0800.030———L210/A0.220.90—0.0300.030———L245/B0.281.20—0.0300.030c，dc，ddL290/X420.281.30—0.0300.030dddL320

2、/X460.281.40—0.0300.030dddL360/X520.281.40—0.0300.030dddL390/X560.281.40—0.0300.030dddL415/X600.28e1.40e—0.0300.030fffL450/X650.28e1.40e—0.0300.030fffL485/X700.28e1.40e—0.0300.030fff焊接钢管L175/A250.210.60—0.0300.030———L175P/A25P0.210.600.0450.0800.030———L210

3、/A0.220.90—0.0300.030———L245/B0.261.20—0.0300.030c，dc，ddL290/X420.261.30—0.0300.030dddL320/X460.261.40—0.0300.030dddL360/X520.261.40—0.0300.030dddL390/X560.261.40—0.0300.030dddL415/X600.26e1.40e—0.0300.030fffL450/X650.26e1.45e—0.0300.030fffL485/X700.26e1.6

4、5e—0.0300.030fffa铜的最大含量为0.50％；镍的最大含量为0.50％；铬的最大含量为0.50％；钼的最大含量为0.15％；对于L360/X52及以下的钢级，不应有意加入Cu，Cr和Ni；b碳含量比规定最大值每降低0.01％，含锰量则允许比规定最大值增高0.05％：对于L245/B≤钢级≤L360/X52，最大锰含量不应超过1.65％；对于L360/X52＜钢级＜L485/X70，最大锰含量不应超过1.75％；对于L485/X70钢级的最大锰含量为2.00％；c除非另有协商，Nb+V≤0.06

5、％；dNb+V+Ti≤0.15％；e除非另有协商；f除非另有协商，Nb+V+Ti≤0.15％。壁厚t≤25.0mm（0.984in）的PSL2钢管的化学成分钢材等级（钢种名称）熔炼分析和产品分析a质量分数（％）（最大）碳当量a（％，最大）CbSiMnbPSVNbTi其他CEIIWCEPcm无缝钢管和焊接钢管L245R或BR0.240.401.200.0250.015cc0.04e0.430.25L290R或X42R0.240.401.200.0250.0150.060.050.04e0.430.25L245

6、N或BN0.240.401.200.0250.015cc0.04e0.430.25L290N或X42N0.240.401.200.0250.0150.060.050.04e0.430.25L320N或X46N0.240.401.400.0250.0150.070.050.04d，e0.430.25L360或X52N0.240.451.400.0250.0150.100.050.04d，e0.430.25L390N或X56N0.240.451.400.0250.0150.10f0.050.04d，e0.430

7、.25L415N或X60N0.24f0.45f1.40f0.0250.0150.10f0.05f0.04fg，h协商L245Q或BQ0.180.451.400.0250.0150.050.050.04e0.430.25L290Q或X42Q0.180.451.400.0250.0150.050.050.04e0.430.25L320Q或X46Q0.180.451.400.0250.0150.050.050.04e0.430.25L360Q或X52Q0.180.451.500.0250.0150.050.050

8、.04e0.430.25L390Q或X56Q0.180.451.500.0250.0150.070.050.04d，e0.430.25L415Q或X60Q0.18f0.45f1.70f0.0250.015gggh0.430.25L450Q或X65Q0.18f0.45f1.70f0.0250.015gggh0.430.25L485Q或X70Q0.18f0.45f1.80f0.0250.015gggh0.430.25