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+Zc250～34045027-0.16HC250/450DPD+ZFc25-0.16HC300/500DPD+Zc290～37050024-0.15HC300/500DPD+ZFc22-0.15HC280/590DPD+Zc280～45059019-0.14HC280/590DPD+ZFc17-HC340/590DPD+Zc340～50059017-0.14B340/590DPD+Zd18HC340/590DPD+ZFc15-0.14B340/590DPD+ZFd16HC420/780DPD+Zc420～55078014--HC420/780DPD+ZFc12--HC500/780DPD+Zc500～65078010--HC500/780DPD+ZFc8--HC550/980DPD+Zc550～7309807--