999抗拉强度与硬度上海国华公司专营宝钢产品:冷板、热板、镀锌板.电话:021-5678总宝钢资源抗拉强度与硬度对照表维氏硬度布氏硬度洛氏硬度抗拉强度N/mm2维氏硬度布氏硬度洛氏硬度HVHBHRBRmHVHBHRB8076112535033335.58580.7111536034236.69085.2119037035237.79590.2122038036138.810095125539037139.810599.8129040038040.8110105132041039041.8115109135042039942.7120114138543040943.6125119142044041844.5130124145545042845.3抗拉强度N/mm2Rm250270285305320335350370380400415430135128148546043746.1450140133152047044746.9465145138155548045647480150143159549046648.4490155147163050047549.1510160152166551048549.8530165156170052049450.5545170162174053050451.1560175166177554051351.7575180171181055052352.3595185176184556053253610190181188057054253.6625195185192058055154.1640200190195559056154.7660205195199560057055.2675210199203061058055.7690215204207062058956.3705220209210563059956.8720225214214564060857.3740230219218065061857.875523522366058.377024022820.367058.878524523321.368059.280025023822.269059.782025524223.170060.1835260247247206185026525224.874061.886527025725.676062.588027526126.478063.390028026627.18006491528527127.882064.793029027628.584065.395029528029.286065.996530028529.888066.49953102953190067103032030432.292067.5106033031433.394068109534032334.4*HRBSt12=65St13=55St14=50硬度试验是机械性能试验中最简单易行的一种试验方法。为了能用硬度试验代替某些机械性能试验,生产上需要一个比较准确的硬度和强度的换算关系。实践证明,金属材料的各种硬度值之间,硬度值与强度值之间具有近似的相应关系。因为硬度值是由起始塑性变形抗力和继续塑性变形抗力决定的,材料的强度越高,塑性变形抗力越高,硬度值也就越高。洛氏硬度中 HRA、HRB、HRC 的区别所谓的各种硬度,是根据硬度的等级,采用不同的测量办法测到的数值,根据一些标准的整理,供参考,详细请读标准⑴ 布氏硬度(HB)以一定的载荷(一般 3000kg)把一定大小(直径一般为 10mm)的淬硬钢球压入材料表面,保持一段时间,去载后,负荷与其压痕面积之比值,即为布氏硬度值(HB),单位为公斤力/mm2(N/mm2。⑵ 洛氏硬度(HR)当 HB〉450 或者试样过小时,不能采用布氏硬度试验而改用洛氏硬度计...