ASTM A193 Grade B8M3 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 B8M3 Raw Material

Grade Raw Material Description
B8M3 AISI 316 Stainless Steel, Carbide Solution Treated and Strain Hardened

ASTM A193 Grade B8M3 Properties

ASTM A193 Grade B8M3 Chemical Composition

Carbon, max Manganese, max Phosphorus, max Sulfur, max Silicon, max Chromium Molybdenum
0.08 2.00 0.045 0.030 1.00 16.0 - 18.0 2.00 - 3.00

ASTM A193 Grade B8M3 Mechanical Properties

Grade Diameter Tensile Strength Yield Strength Elongation Reduction Hardness
Grade B8M3, Class 2C M48 and under 585 450 30 60 321 HBW or 35 HRC
Grade B8M3, Class 2C Over M48 585 415 30 60 321 HBW or 35 HRC

ASTM A193 Bolt Marking

Class Manufacturer's Mark Grade Symbol
Class 2C BPF B9H or B8M3

Recommended Nuts & Washers

Bolting Grade Nut Grade Washer Grade
ASTM A193 Grade B8M3 ASTM A194 Grade 8M, 8MA SS 316

ASTM A193 Grade B8M3 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