Q345B厚壁鋼管無縫鋼小口徑厚壁鋼管管的化學成分，Q345B無縫鋼管現貨
Q345B無縫管C45#厚壁鋼管:0.大口徑厚壁鋼管12-0.20S20#厚壁鋼管i:0.20-0.60Mn:1.00-1.60P:≤0.040S:≤0.040Ni:≤0.30Cr:≤0.30Cu:≤0.20V:0.02-0.15Nb:0.015-0.06 Q345B無縫管C:0.12-0.20Si:0.20-0.60Mn:1.00-1.60P:≤0.040S:≤0.040Ni:≤0.30Cr:≤0.30Cu:≤0.20V:0.02-0.15Nb:0.015-0.06
Q345B無縫鋼管的化學成分，Q345B無縫鋼管現貨
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