ASTM A193 Grade B8NA 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 B8NA Raw Material

Grade Raw Material Description
B8N AISI 304N Stainless Steel, Carbide Solution Treated and Strain Hardened

ASTM A193 Grade B8NA Properties

ASTM A193 Grade B8NA Chemical Composition

Carbon Manganese, max Phosphorus, max Sulfur, max Silicon Chromium Molybdenum
0.10 min 1.00 0.040 0.030 1.00 max 4.00-6.00 0.40-0.65

ASTM A193 Grade B8NA Mechanical Properties

Grade Diameter Tensile Strength Yield Strength Elongation Reduction Hardness
             

ASTM A193 Grade B8NA Bolt Marking

Class Manufacture's Mark Grade Symbol
Class 1A BPF B8NA

Recommended Nuts & Washers

Bolting Grade Nut Grade Washer Grade
     

ASTM A193 Grade B8NA 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