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ASTM
A1077/A1077M-21
Standard Specification for Structural Steel with Improved Yield Strength at High Temperature for Use in Buildings
2021
4
ASTM Vol.01.04 (2022)
This specification covers alloy steel in bars, plates up to and including 4 in. [100 mm] in thickness and shapes of structural quality with improved yield strength at high temperature. Two grades, 36 [250] and 50 [345] are available for use in bolted or welded buildings or for general structural purposes. Class 2 requires a maximum yield to tensile ratio – this ratio is not required for Class 1...