ASTM A193 Grade B8 Mechanical Properties

ASTM A193 Grade B8M Mechanical Properties

Find typical requirement for ASTM A193 Grade B8 Mechanical Properties. Tensile, yield strength and hardness requirement of finished products manufactured to ASTM A193 Grade B8 specification must comply with below requirement. AISI 304/304L with carbide solution treatment can achieve mechanical requirements of A193-B8 Class 1 boltings and strain hardening can achieve mechanical requirements of A193-B8 Class 2 boltings.

Mechanical Requirements, Inch Products
Class	Diameter	Tensile Strength, min, ksi	Yield Strength, min, ksi	Elongation in 4D min, %	Reduction of Area, min, %	Hardness, max
1	All Diameters	75	30	30	50	223 HBW	96 HRB
2	3/4 and under	110	95	15	45	321 HBW	35 HRC
	Over ¾ to 1, incl.	100	80	20	45
	Over 1 to 1-1/4, incl.	95	65	25	45
	Over 1-1/4 to 1-1/2, incl.	90	50	30	45

Mechanical Requirements, Metric Products
Class	Diameter	Tensile Strength, min, Mpa	Yield Strength, min, Mpa	Elongation in 4D min, %	Reduction of Area, min, %	Hardness, max
1	All Diameters	515	205	30	50	223 HBW	96 HRB
2	M20 and under	760	655	15	45	321 HBW	35 HRC
	Over ¾ to 1, incl.	690	550	20	45
	Over M24 to M30, incl.	655	450	25	45
	Over M30 to M36, incl.	620	345	30	45

Class	Heat Treatment Procedure
Class 1	Carbide Solution Treatment
Class 2	Carbide Solution Treatment & Strain Hardened