ASTM A193 Mechanical Properties

Grade	Size (inches)	Tensile ksi, min	Yield, ksi, min	Elong, %, min	RA % min	HBW	HRC
B6	Up to 4, incl	110	85	15	50	-	-
B6X	-	90	70	16	-	-	-
B7	Up to 2-1/2	125	105	16	50	321 max	35 max
	2-5/8 - 4	115	95	16	50
	4-1/8 - 7	100	75	18	50
B8 Class 1	All	75	30	30	50	223 max	35 max
B8M Class 1	All	75	30	30	50	223 max	96 max
B8 Class 2	Up to 3/4	125	100	12	35	321 max	35 max
	7/8 - 1	115	80	15	35
	1-1/8 - 1-1/4	105	65	20	35
	1-3/8 - 1-1/2	100	50	28	45
B8M Class 2	Up to 3/4	110	95	15	45	321 max	35 max
	7/8 - 1	100	80	20	45
	1-1/8 - 1-1/4	95	65	25	45
	1-3/8 - 1-1/2	90	50	30	45
B16	Up to 2-1/2	125	105	18	50	321 max	35 max
	over 2-1/2 to 4	110	95	17	45
	over 4 to 8	100	85	16	45