Reference Info

ASTM Standards For Ferrous Metals

STANDARD SPECIFICATION FOR STRUCTURAL STEEL A36

Product	Shapes			Plates				Bars
Thickness, in. (mm)	All	To 3/4 (19), incl.	Over 3/4 to 1 1/2 (19 to 38), incl.	Over 1 1/2 to 2 1/2 (38 to 64), incl.	Over 2 1/2 to 4 (64 to 102), incl.	Over 4 (102)	To 3/4 (19), incl.	Over 3/4 to 1 1/2 (19 to 38), incl.	Over 1 1/2 to 4 (102), incl.	Over 4 (102)
Carbon, max, percent	0.26	0.25	0.25	0.26	0.27	0.29	0.26	0.27	0.28	0.29
Manganese, percent			.8-1.2	.8-1.2	.85-1.2	.85-1.2		.6-.9	.6-.9	.6-.9
Phosphorus, max, percent	0.04	0.04	0.04	0.04	0.04	0.04	0.04	0.04	0.04	0.04
Sulfur, max, percent	0.05	0.05	0.05	0.05	0.05	0.05	0.05	0.05	0.05	0.05
Silicon, percent				.15-.3	.15-.3	.15-.3
Copper, min, percent, 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

Manganese content of .85-1.35 percent and silicon content of .15-.30 percent is required for shapes over 426 lb./ft.*

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