[国外标准] ASTM A490-08b Standard Specification for Structural Bolts,Alloy Steel, Heat Treated, 150 ksi Minimum
[国外标准] ASTM A490-08a Standard Specification For Structural BoltasAlloy Steel,Heat Treated,150 ksiMinimum Te
[国外标准] ASTM A490-04
[国外标准] ASTM A490-02
[国外标准] ASTM A490-00