弹限强度 meaning in English

proof strength

Steel forgings for pressure purposes . part 4 : weldable fine grain steels with high proof strength
承压钢锻件.第4部分:高弹限强度可焊接细晶钢
Steel forgings for pressure purposes - part 4 : weldable fine grain steels with high proof strength includes amendment a1 : 2001 ; german version en 10222 - 4 : 1998 a1 : 2001
压力容器用钢锻件.第4部分:高弹限强度可焊接细晶粒钢