What is the American Society for Testing and Materials (ASTM) standard for H-beams?

ASTM standards for H-beams include: 1) ASTM A36/A36M: For carbon steel H-beams (yield 250MPa), used in buildings, bridges, and general structures-equivalent to Q235B; 2) ASTM A572/A572M: For HSLA H-beams, with grades 42 (290MPa), 50 (345MPa, equivalent to Q355B), 60 (415MPa), and 65 (450MPa)-used in heavy construction and machinery; 3) ASTM A607/A607M: For high-strength H-beams (grades 70–90, yield 485–620MPa) for automotive and industrial applications. ASTM standards specify chemical composition (e.g., Mn≤1.60% for A36), mechanical properties (tensile strength 400–550MPa for A36), and dimensional tolerances (per ASTM A6/A6M).