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1、热 镀 锌 板 卷机械性能化学成分牌号化学成分，%CSiMnP，S，Alt，残余元素01、02、SGCC、DX51D+Z0.070.030.50.0250.0250.02Cu0.10%03、SGCD1、DX52D+Z0.060.030.450.0250.0250.02Ni0.08%04、SGCD2、DX53D+Z0.030.030.40.020.020.02Cr0.10%220、S220GDZ0.170.310.0350.030.02As0.05%250、S250GDZ0.170.310.0350.030.02Sn0.05%280、S280GDZ0.170.310.0350.030.02320
2、、S320GDZ0.20.31.30.0350.030.02350、S350GDZ0.20.551.60.0350.030.02力学性能和工艺性能牌号力学性能锌层弯曲试验屈服点RP0.21)，MPa抗拉强度Rm，MPa伸长率A802)，%弯心直径（a板厚）DX51D+Z27050022Z60Z2750aDX52D+Z1403003)27042026Z3501aDX53D+Z14026027038030Z450Z6002aS220GD+Z220300440201aS250GD+Z250330470191aS280GD+Z280360500182aS320GD+Z320390530173aS350GD+Z350420560163a 4)力学性能和工艺性能牌号抗拉强下列公称厚度（mm）的延伸率A50，%，不小于锌层弯曲试验度RmMPa锌层代号弯心直径SGCCZ60Z3501aZ450Z6002aSGCD127034363738Z60Z3501aSGCD236383940Z60Z2750
