ASTM A193 Grade B8A Bolts, Stud Bolts, Fasteners

Standard Specification for Alloy-Steel and Stainless Steel Bolting for High Temperature or High Pressure Service and Other Special Purpose Applications

ASTM A193 specification covers alloy and stainless steel bolting for pressure vessels, valves, flanges, and fittings for high temperature or high pressure service, or other special purpose applications. Several grades are covered, including ferritic steels and austenitic stainless steels designated B5, B6, B7, B8, B8M, etc. Selection will depend upon design, service conditions, mechanical properties, and high temperature characteristics. This specification is expressed in both inch-pound units and in SI units; however, unless the purchase order or contract specifies the applicable A193M specification designation (SI units), the inch-pound units shall apply

ASTM A193 Grade B8A Raw Material

Grade Raw Material Description
B8A AISI 304 Stainless Steel, Carbide solution treated in the finished condition

ASTM A193 Grade B8A Properties

ASTM A193 Grade B8A Chemical Composition

Carbon, max Manganese, max Phosphorus, max Sulfur, max Silicon, max Chromium
0.08 2.00 0.045 0.030 1.00 18.0 - 20.0

ASTM A193 Grade B8A Mechanical Properties

Grade Diameter Tensile Strength Yield Strength Elongation Reduction Hardness
Grade B8A All Diameters 515 205 30 50 192 HBW or 90 HRB

ASTM A193 Grade B8A Bolt Marking

Class Manufacturer's Mark Grade Symbol
Class 1A BPF B8A

Recommended Nuts & Washers

Bolting Grade Nut Grade Washer Grade

ASTM A193 Grade B8A Bolting

Hex Bolt Heavy Hex Bolts Stud Bolts Threaded Rods Anchor Bolts
Eye Bolts Socket Head Cap Screws Countersunk Screws J Bolts Square Head Bolts