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G40.20-13/G40.21-13 - General requirements for rolled or welded structural quality steel / Structural quality steel
This seventh edition, two-part standard covers structural quality steel plates, shapes, hollow sections, sheet, sheet piling, cold-formed channels, Z sections, and bars for general construction and engineering purposes. The following types of steel are covered by this Standard:
Changes in this revised Standard include updated plate and sheet dimension sizes to align with ASTM, a new definition on normalize rolled, allowance of Niobium and Vanadium to be used for grain refining, and added new grades 345WM (50WM), 345WMT (50WMT), 450W (65W), and 450WT (65WT).