ASTM A193 Grade B8MLCuN 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 B8MLCuN Raw Material

Grade Raw Material Description
B8MLCuN AISI 304N Stainless Steel, Carbide Solution Treated and Strain Hardened
B8MLCuN UNS S31254 Stainless Steel, Carbide Solution Treated and Strain Hardened

ASTM A193 Grade B8MLCuN Properties

ASTM A193 Grade B8MLCuN Chemical Composition

Carbon Manganese, max Phosphorus, max Sulfur, max Silicon Chromium Molybdenum

ASTM A193 Grade B6 Mechanical Properties

Grade Diameter Tensile Strength Yield Strength Elongation Reduction Hardness
Grade B8MLCuN, Class 2 M20 and under 760 655 15 45 321 HBW or 35 HRC
Grade B8MLCuN, Class 2 M20 to M24, inclusive 690 550 20 45 321 HBW or 35 HRC
Grade B8MLCuN, Class 2 M24 to M30, inclusive 655 450 25 45 321 HBW or 35 HRC
Grade B8MLCuN, Class 2 M30 to M36, inclusive 620 345 30 45 321 HBW or 35 HRC

ASTM A193 Grade B8MLCuN Bolt Marking

Class Manufacture's Marking Grade Symbol
Class 1B BPF B9J or B8MLCuN
Class 2 BPF B0JSH

Recommended Nuts & Washers

Bolting Grade Nut Grade Washer Grade
ASTM A193 Grade B8MLCuN ASTM A194 Grade 8MLCuN 254SMO / UNS S31254

ASTM A193 Grade B8MLCuN 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