ASTM A193 Grade B8 Mechanical Properties

ASTM A193 Grade B8 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 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.

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 125 100 12 35 321 HBW 35 HRC
Over ¾ to 1, incl. 115 80 15 35
Over 1 to 1-1/4, incl. 105 65 20 35
Over 1-1/4 to 1-1/2, incl. 100 50 28 45
2B 2 and under 95 75 25 40 321 HBW 35 HRC
Over 2 to 2-1/2, incl. 90 65 30 40
Over 2-1/2 to 3, incl. 80 55 30 40
Mechanical Requirements, Metric Products
Class Diameter Tensile Strength, min, ksi Yield Strength, min, ksi 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 860 690 12 35 321 HBW 35 HRC
Over M20 to M24, incl. 795 550 15 35
Over M24 to M30, incl. 725 450 20 35
Over M30 to M36, incl. 690 345 28 45
2B M48 and under 655 515 25 40 321 HBW 35 HRC
Over M48 to M64, incl. 620 450 30 40
Over M64 to M72, incl. 550 380 30 40

Heat Treatment

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