ASTM A299 / A299M Grade A

Chemical Properties

Carbon, max^A				Manganese		Phosphorus,max^A	Sulfur,max^A	Silicon
1 in. [25 mm] and under		Over 1 in. [25 mm]		1 in. [25 mm] and under	Over 1 in. [25 mm]
Grade A	Grade B	Grade A	Grade B	1 in. [25 mm] and under	Over 1 in. [25 mm]
0.26	0.28	0.28	0.30	0.84 to 1.52	0.84 to 1.62	0.025	0.025	0.13 to 0.45

Note: A Applies to both heat and product analyses.

Tensile strength,min: ksi [MPa]	Yield strength,min^A: ksi [MPa]		Elongation in 8 in. [200 mm] min, %^B	Elongation in 2 in. [50 mm] min, %^B
Tensile strength,min: ksi [MPa]	1 in. [25 mm] and under	Over 1 in. [25 mm]	Elongation in 8 in. [200 mm] min, %^B	Elongation in 2 in. [50 mm] min, %^B
80–100 [550–690]	47 [325]	45 [310]	16	19

Note: B Determined by either the 0.2 % offset method or the 0.5 % extension-under-load method.