符号对比 抗拉强度tensile strength 上屈服强度upper yield strength 下屈服强度lower yield strength 规定塑性延伸强度 规定总延伸强度 断后伸长率 断面收缩率 ASTM E6 国标GB/T 228.1、国际ISO 6892-1、日标JIS Z2241 Rm ReH ReL Rp(0.2) (proof strength, plastic extension) Rt(0.5) (proof strength, total extension) A、A11.3、A50mm (percentage elongation after fracture) Z (percentage reduction of area) 美标ASTM E8/E8M、ASTM A370 Su UYS LYS YS(0.2% offset) or Sy(0.2% offset) (Specified offset yield strength) YS(0.5% EUL) or Sy(0.5% EUL) (Specified extension under load yield strength) elongation after fracture reduction of area 本文来源：https://www.wddqw.com/doc/94b7b98df424ccbff121dd36a32d7375a417c68a.html