1、Q550GJD钢板技术标准：GB/T19879-20152、Q550GJD钢板交货状态：TMCP、TMCP+回火、淬火+回火、调质、Q+T3、Q550GJD钢板化学成分熔炼分析CSiMnPSNiCrMoCuNbVTiAls≤0.18≤0.6≤2≤0.02≤0.010≤2≤1.2≤0.6≤0.5≤0.11≤0.12≤0.03≥0.015成分备注：可用Alt代替Als，此时…