ASTM A193 Grade B8CA 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 B8CA Raw Material

Grade Raw Material Description
B8CA AISI 347 Stainless Steel, Carbide Solution Treated in Finished Condition

ASTM A193 Grade B8CA Properties

ASTM A193 Grade B8CA Chemical Composition

Carbon, max Manganese, max Phosphorus, max Sulfur, max Silicon Chromium Molybdenum Columnium + Tantalum
0.08 2.00 0.045 0.030 1.00 17.0 - 19.0 -- 10 x carbon content, min – 1.10 max

ASTM A193 Grade B8CA Mechanical Properties

Grade Diameter Tensile Strength Yield Strength Elongation Reduction Hardness
Grade B8CA All Diameters 515 205 30 50 192 HBW or 90 HRB

ASTM A193 Grade B8CA Bolt Marking

Class Manufacturer's Mark Grade Symbol
Class 1A BPF B8B or B8CA

Recommended Nuts & Washers

Bolting Grade Nut Grade Washer Grade
ASTM A193 Grade B8CA ASTM A194 Grade 8CA SS 347

ASTM A193 Grade B8CA 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