范文范例参考表1 普通碳钢及优质碳钢构件基本许用应力 /MPa材料类型材料标号截面尺寸/mm热处理材料性能拉 压弯 曲扭 转剪 切抗拉强度 b屈服强度 s/MPalllnnn普通碳钢Q215100热扎b335410s185215145125901751401059590601009060Q235b375460s205235160140100190160120105956511010070Q275b490610s2352751751501102101701301151057012011080优质碳钢20100正火b410s245175145105210165125115105701201057525b450s275195160115230175135125115751351208035b530s3152101801252502001501351208014512085调质b550750s320370210185130250205155135125851451208545正火b600s3552302001452702201701501359016014095调质b630800s3704302502151503002351801601501001751501005025正火b630s375250215150300235180160150100175150100100调质b700s400265235165310260195170155105180160110表2 碳钢铸件基本许用应力 /MPa材料标号截面尺寸/mm热处理材料性能拉 压弯 曲扭 转剪 切抗拉强度 b屈服强度 s/MPalllnnnZG200400100正火及回火b400s20013512090160135105908060958560ZG230450b450s23015514010018515512010085651109065ZG270500b500s2701751601152101751351151007512010575ZG310570b570s3101901701252301901451251058013011080ZG340640b640s3402001801302402051551301158714012087表3 灰铸铁基本许用应力 /MPa材料标号壁 厚/mm抗压强度/MPa抗拉强度/MPa中 心 抗 压弯 曲扭 剪压拉拉 压lllllHT-1502.51050070017514080502820503023452418102014514080412417412519372015203013014080372115372217331813305012014080341914342115311712HT-2002.510600800220170100633625633828573123102019517010056322256332550272020301701701004928194929224424173050160170100462618462721412216HT-2504.0108001000270230130774431774635693728102024023013069392769413162332520302202301306336256338285731233050200230130573223573426512821HT-30010201000120029028516083473383503775403020302502851607141297143326435263050230285160663726663930593224HT-35010201100130034031518097553997584487473520302903151808347338350377540303050260315180744230744433673627 附表 钢铁的许用应力（kgf/cm2）载 荷软 钢中 硬 钢铸 钢钢 铁拉 伸90015006001000300 50012001800800 1200400 6006001200400600200400300200100压 缩9001500600100012001800800 120090015006001000900600弯 曲90015006001000300 50012001800800 1200400 6007501200500 800250 400剪 切7201200480 800240 4009601440640 960320 480480960320640160320300200100扭 转6001200400 800200 4009001440640 960320 480480960320640160320（注）载荷指 ：静载荷：重复载荷：交变载荷表4 许用弯曲应力材 料极限强度kgf/cm2许用应力 kgf/cm2稳定载荷冲击或脉动载荷反复交变载荷碳 素 钢400050006000700013001700200023007007509501100400450550650合 金 钢8000100002700330013001600750900铸 钢4000500010001200500700300400 WORD格式整理 表5 轴的常用材料及许用弯曲应力30钢 号处 理毛坯直径(mm)机 械 性 能硬 度HB许用弯曲应力wkgf/cm2bkgf/mm2skgf/mm2-1kgf/mm235正 火正 火正 火正火+回火调 质251001003003005005007501001003005452504846565432272624233028262524232226.525.51871431871431871371871311871632011442011100105010009609201100108045正 火正 火正 火正火+回火调 质251001003003005005007002006160585654653630292827362827.527262530241170207163207156207