檢視断面收缩率的原始碼

[[File:断面收缩率.jpg|缩略图|[https://image.baidu.com/search/detail?ct=503316480&z=0&ipn=d&word=%E6%96%AD%E9%9D%A2%E6%94%B6%E7%BC%A9%E7%8E%87&step_word=&hs=0&pn=0&spn=0&di=47740&pi=0&rn=1&tn=baiduimagedetail&is=0%2C0&istype=0&ie=utf-8&oe=utf-8&in=&cl=2&lm=-1&st=undefined&cs=317125235%2C1782944278&os=1284686161%2C1848600223&simid=3475480495%2C459849672&adpicid=0&lpn=0&ln=1185&fr=&fmq=1623149631847_R&fm=&ic=undefined&s=undefined&hd=undefined&latest=undefined&copyright=undefined&se=&sme=&tab=0&width=undefined&height=undefined&face=undefined&ist=&jit=&cg=&bdtype=0&oriquery=&objurl=https%3A%2F%2Fgimg2.baidu.com%2Fimage_search%2Fsrc%3Dhttp%3A%2F%2Fwww.51wendang.com%2Fpic%2F94e228632e0cffdf35057086%2F7-810-jpg_6-1080-0-0-1080.jpg%26refer%3Dhttp%3A%2F%2Fwww.51wendang.com%26app%3D2002%26size%3Df9999%2C10000%26q%3Da80%26n%3D0%26g%3D0n%26fmt%3Djpeg%3Fsec%3D1625741641%26t%3Ddcb79dde66e38d841deb67b6009b28f0&fromurl=ippr_z2C%24qAzdH3FAzdH3Fooo_z%26e3Bc8ojg1wg2_z%26e3Bv54AzdH3F15vAzdH3Fl9jddbmndjavuu1uncac0abmAzdH3F0&gsm=1&rpstart=0&rpnum=0&islist=&querylist=&nojc=undefined 原图链接][https://www.51wendang.com/doc/94e228632e0cffdf35057086/7 来自无忧文档]]]
'''断面收缩率'''是衡量材料塑性变形能力的性能指标。采用标准拉伸试样测试。试样拉断时颈缩部位的截面积与原始截面积之差，除以原始截面积之商的百分数即为断面收缩率。该值愈大说明材料的塑性愈好，对于锅炉、压力容器受压元件及其他重要工程构件的材料必须严格控制该值。