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时间:2018-11-28
《钢铁材料的许用应力》由会员上传分享,免费在线阅读,更多相关内容在应用文档-天天文库。
1、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σb屈服强度σs/MPaⅠⅡⅢⅠⅡⅢⅠⅡⅢⅠⅡⅢσlσlσlσσστnτnτnτττ普通碳钢Q215100热扎σb335~410σs185~215145125901751401059590601009060Q235σb375~460σs205~235160140100190160120105956511010070Q275σb490~610σs235~27517515011021017013011510570
2、12011080优质碳钢20≤100正火σb410σs245175145105210165125115105701201057525σb450σs275195160115230175135125115751351208035σb530σs3152101801252502001501351208014512085调质σb550~750σs320~370210185130250205155135125851451208545正火σb600σs3552302001452702201701501359016014095调质σb6
3、30~800σs370~43025021515030023518016015010017515010050≤25正火σb630σs375250215150300235180160150100175150100≤100调质σb>700σs>400265235165310260195170155105180160110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σb屈服强度σs/MPaⅠⅡⅢⅠⅡⅢⅠⅡⅢⅠⅡⅢσlσlσlσσστnτnτnτττZG200~400100正火及回火
4、σb400σs20013512090160135105908060958560ZG230~450σb450σs23015514010018515512010085651109065ZG270~500σb500σs2701751601152101751351151007512010575ZG310~570σb570σs3101901701252301901451251058013011080ZG340~640σb640σs3402001801302402051551301158714012087表3灰铸铁基本许用应力/MP
5、a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ⅠⅡⅠⅡⅢⅠⅡⅢⅠⅡⅢσlσlσlσlσlττττττHT-150>2.5~10500~70017514080502820503023452418>10~2014514080412417412519372015>20~3013014080372115372217331813>30~5012014080341914342115311712HT-200>2.5~10600~800220170100633625633828573123>10~20195
6、170100563222563325502720>20~30170170100492819492922442417>30~50160170100462618462721412216HT-250>4.0~10800~1000270230130774431774635693728>10~20240230130693927694131623325>20~30220230130633625633828573123>30~50200230130573223573426512821HT-300>10~201000~120029028
7、5160834733835037754030>20~30250285160714129714332643526>30~50230285160663726663930593224HT-350>10~201100~1300340315180975539975844874735>20~30290315180834733835037754030>30~50260315180744230744433673627附表钢铁的许用应力(kgf/cm2)载荷软钢中硬钢铸钢钢铁拉伸ⅠⅡⅢ900~1500600~1000300~5001200
8、~1800800~1200400~600600~1200400~600200~400300200100压缩ⅠⅡ900~1500600~10001200~1800800~1200900~1500600~1000900600弯曲ⅠⅡⅢ900~1500600~1000300~5001200~1800800~1200400~
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