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美标管线管化学成分解析|天津管线管价格|Q345B无缝管价格
标准 牌号 化学成分(%) 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 协议 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经协商Mo≤0.35% 化学成分:
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