ASTM A320 Mechanical Properties

Grade	Diameter	Tensile, ksi, min	Yield, ksi, min	Charpy Impact 20-ft-lbf @ temp	Elong, %, min	RA, %, min
L7	Up to 21⁄2	125	105	-150° F	16	50
L43	Up to 4	125	105	-150° F	16	50
Class 1: BC, B8C, B8M, B8P, B8F, B8T, B8LN, B8MLN	All	75	30	N/A	30	50
Class 1A: B8A, B8CA, B8MA, B8PA, B8FA, B8TA, B8LNA, B8MLNA	All	75	30	N/A	30	50
Class 2: B8, B8C, B8P, B8F, B8T	Up to 3⁄4	125	100	N/A	12	35
	7⁄8 - 1	115	80	N/A	15	35
	11⁄8 - 11⁄4	105	65	N/A	20	35
	13⁄8 - 11⁄2	100	50	N/A	28	45
Class 2: B8M	Up to 3⁄4	110	95	N/A	15	45
	7⁄8 - 1	100	80	N/A	20	45
	11⁄8 - 11⁄4	95	65	N/A	25	45
	13⁄8 - 11⁄2	90	50	N/A	30	45