What are the common grades of H-beams?

Common H-beam grades vary by region and application. In China, GB/T 11263 specifies grades like Q235B (yield strength ≥235MPa, widely used in general construction) and Q355B (yield strength ≥355MPa, for heavy-duty structures). Internationally, ASTM A36 (USA, yield 250MPa, versatile for buildings/bridges), EN 10025-2 S235JR/S355JR (Europe, equivalent to Q235B/Q355B), and JIS G3192 SS400/SM490 (Japan, for industrial frames) are prevalent. High-strength grades like Q460 and ASTM A572 Grade 50 are used in high-rise buildings or heavy machinery, offering enhanced load-bearing capacity.