ASTM A193 Grade B8

ASTM A193 Grade B8

ASTM A193 Grade B8 is a standard specification for high tensile 304/304L stainless-steel bolts, for high-temperature, high-pressure service and other special purpose applications. A193 grade b8 is chemically equivalent to (AISI 304) 18-8 stainless steel alloy with tensile strength diversified in two different tensile classes namely class 1 and class 2.

A193 Grade B8 class 1 bolts are carbide solution treated with maximum tensile strength requirement of 75 ksi or 515 MPa, yield 30 ksi or 205 MPa, and maximum hardness of 223 HBW whereas grade b8 class 2 bolts are carbide solution treated and strain hardened to achieve higher tensile requirement of 125 ksi or 860 MPa and 100 ksi or 690 MPa and maximum hardness of 321 HBW or 35HRC. Grade B8 fasteners are used for high strength pipeline bolting applications.

Visit Specification page to find information on ASTM A193 Grade B8 chemical composition, applicable heat treatment, and mechanical properties such as tensile strength, yield strength, hardness requirement, product marking, applicable product standards, etc.,

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ASTM A193 Grade B8 Fasteners

Product Standards