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ASTM A193 Bolts, Fasteners and Fixings

ASTM A193 is a specification for high tensile alloy and Stainless Steel fasteners which include various grades of Ferritic Steels and Austenitic Stainless Steels.ASTM A193 Bolts, Fasteners and Fixings

These specific materials are designed for high temperature or high pressure service, as well as other special purpose applications such as pressure vessels, valves, flanges, and fittings.

Choosing the right grade will depend on the intended application or assembly, each of which differ slightly in terms of design, service conditions, properties and characteristics.

The most popular grades are A193 B7 and A193 B8 – often used for bolts and studs in high strength and high temperature applications respectively.

Other common grades within the ASTM A193 specification include B5, B6, B7M, B8M, B8T, and B16. The full list of ASTM A193 grades can be found below.

 

ASTM A193 Grades
Grade / Tensile Class Description
B5 5% Chromium Ferritic Steel
B6 13% Chromium Ferritic Steel
B7 Chromium Molybdenum Alloy Steel, Quenched & Tempered
B7M Chromium Molybdenum Alloy Steel, Quenched & Tempered
B16 Chromium Molybdenum Vanadium Alloy Steel, Quenched & Tempered
B8 AISI 304 Stainless Steel
B8 Class 1 AISI 304 Stainless Steel, Carbide Solution Treated
B8 Class 2 AISI 304 Stainless Steel, Carbide Solution Treated & Strain Hardened
B8 Class 2B AISI 304 Stainless Steel, Carbide Solution Treated & Strain Hardened
B8A AISI 304 Stainless Steel, Carbide Solution Treated in Finished Condition
B8C AISI 347 Stainless Steel
B8C Class 1 AISI 347 Stainless Steel, Carbide Solution Treated
B8C Class 2 AISI 347 Stainless Steel, Carbide Solution Treated & Strain Hardened
B8CA AISI 347 Stainless Steel, Carbide Solution Treated in Finished Condition
B8CLN AISI 347LN Stainless Steel
B8CLN Class 1 AISI 347LN Stainless Steel, Carbide Solution Treated
B8CLN Class 1D AISI 347LN Stainless Steel, Carbide Solution Treated
B8CLNA AISI 347LN Stainless Steel, Carbide Solution Treated in Finished Condition
B8LN AISI 304LN Stainless Steel, Carbide Solution Treated
B8LN Class 1 AISI 304LN Stainless Steel, Carbide Solution Treated
B8LN Class 1D AISI 304LN Stainless Steel, Carbide Solution Treated
B8LNA AISI 304LN Stainless Steel, Carbide Solution Treated in Finished Condition
B8M AISI 316 Stainless Steel
B8M Class 1 AISI 316 Stainless Steel, Carbide Solution Treated
B8M Class 2 AISI 316 Stainless Steel, Carbide Solution Treated & Strain Hardened
B8M2 AISI 316 Stainless Steel, Carbide Solution Treated & Strain Hardened
B8M3 AISI 316 Stainless Steel, Carbide Solution Treated & Strain Hardened
B8MA AISI 316 Stainless Steel, Carbide Solution Treated in Finished Condition
B8MLCuN UNS S31254 Stainless Steel, Carbide Solution Treated
B8MLCuN Class 1B UNS S31254 Stainless Steel, Carbide Solution Treated & Strain Hardened
B8MLCuN Class 1D UNS S31254 Stainless Steel, Carbide Solution Treated
B8MLCuN Class 2 UNS S31254 Stainless Steel, Carbide Solution Treated & Strain Hardened
B8MLCuNA UNS S31254 Stainless Steel, Carbide Solution Treated
B8MLN AISI 316LN Stainless Steel, Carbide Solution Treated & Strain Hardened
B8MLNA AISI 316LN Stainless Steel, Carbide Solution Treated in Finished Condition
B8MN AISI 316N Stainless Steel, Carbide Solution Treated
B8MN Class 1B AISI 316N Stainless Steel, Carbide Solution Treated
B8MN Class 1D AISI 316N Stainless Steel, Carbide Solution Treated
B8MN Class 2 AISI 316N Stainless Steel, Carbide Solution Treated & Strain Hardened
B8MNA AISI 316N Stainless Steel, Carbide Solution Treated in Finished Condition
B8N AISI 304N Stainless Steel, Carbide Solution Treated
B8N Class 1B AISI 304N Stainless Steel, Carbide Solution Treated
B8N Class 1D AISI 304N Stainless Steel, Carbide Solution Treated
B8N Class 2 AISI 304N Stainless Steel, Carbide Solution Treated & Strain Hardened
B8NA AISI 304N Stainless Steel, Carbide Solution Treated in Finished Condition
B8P UNS S30500 Stainless Steel, Carbide Solution Treated
B8PA UNS S30500 Stainless Steel, Carbide Solution Treated in Finished Condition
B8R UNS S20910 Stainless Steel, Carbide Solution Treated
B8R Class 1C UNS S20910 Stainless Steel, Carbide Solution Treated
B8R Class 1D UNS S20910 Stainless Steel, Carbide Solution Treated
B8RA UNS S20910 Stainless Steel, Carbide Solution Treated in Finished Condition
B8S UNS S21800 Stainless Steel, Carbide Solution Treated
B8SA UNS S21800 Stainless Steel, Carbide Solution Treated in Finished Condition
B8T AISI 321 Stainless Steel, Carbide Solution Tested
B8T Class 1 AISI 321 Stainless Steel, Carbide Solution Tested
B8T Class 2 AISI 321 Stainless Steel, Carbide Solution Tested & Strain Hardened
B8TA AISI 321 Stainless Steel, Carbide Solution Tested in Finished Condition

Due to the speciality of these grades, all products are manufactured to order according to customer requirements.

If you require more information or would like to order a product in one of the ASTM A193 grades, please contact us.

See all materials and finishes here.

 

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