ASTM A 36/A 36M Norms For Structural Carbon Steel

ASTM A36 Specifications for Structural Carbon Steel

Product	Shapes ^A	Plates ^B					Bars
Thickness, in. [mm]	All	To 3⁄4 20], incl	Over 3⁄4 to 11⁄2 [20 to 40], incl	Over 11⁄2 to 21⁄2 [40 to 65], incl	Over 21⁄2 to 4 [65 to 100], incl	Over 4 [100]	To 3⁄4 [20], incl	Over 3⁄4 to 11⁄2 [20 to 40], incl	Over 11⁄2 to 4 [100], incl	Over 4 [100]
Carbon, max, %	0.26	0.25	0.25	0.26	0.27	0.29	0.26	0.27	0.28	0.29
Manganese, %	---	---	0.80–1.20	0.80–1.20	0.85–1.20	0.85–1.20	---	0.60–0.90	0.60–0.90	0.60–0.90
Phosphorus, max, %	0.04	0.04	0.04	0.04	0.04	0.04	0.04	0.04	0.04	0.04
Sulfur, max, %	0.05	0.05	0.05	0.05	0.05	0.05	0.05	0.05	0.05	0.05
Silicon, %	0.40 max	0.40 max	0.40 max	0.15–0.40	0.15–0.40	0.15–0.40	0.40 max	0.40 max	0.40 max	0.40 max
Copper, min, % when copper steel is specified	0.2	0.2	0.2	0.2	0.2	0.2	0.2	0.2	0.2	0.2
^A Manganese content of 0.85–1.35 % and silicon content of 0.15–0.40 % is required for shapes over 426 lb/ft [634 kg/m]. ^B For each reduction of 0.01 percentage point below the specified carbon maximum, an increase of 0.06 percentage point manganese above the specified maximum will be permitted, up to the maximum of 1.35 %.