牌号拉伸试验a,b,cn90屈服强度抗拉强度断后伸长率不小于MPaMPa%
不小于不小于
A80mm(Lo＝50mm,b=25mm)
HC250/450DPD+Zc250～-0.16HC250/450DPD+ZFc25-0.16HC300/500DPD+Zc290～-0.15HC300/500DPD+ZFc22-0.15HC280/590DPD+Zc280～-0.14HC280/590DPD+ZFc17-HC340/590DPD+Zc340～-0.14B340/590DPD+Zd18HC340/590DPD+ZFc15-0.14B340/590DPD+ZFd16HC420/780DPD+Zc420～--HC420/780DPD+ZFc12--HC500/780DPD+Zc500～--HC500/780DPD+ZFc8--HC550/980DPD+Zc550～7309807--