Alloy 20 Fasteners

Alloy 20 Fasteners — Material Overview & Form Factors

Alloy 20 is a high-performance alloy used wherever standard fasteners cannot meet the corrosion, temperature, or strength envelope. TorqBolt manufactures the full Alloy 20 fastener range — bolts, nuts, screws, washers, studs, and custom forgings — under one ISO 9001:2015 quality system, with PED 2014/68/EU module-H qualification for pressure-equipment service.

Where Alloy 20 Excels

Alloy 20 is specified in oil & gas wellhead components, refinery heat exchangers, petrochemical reactors, power-generation turbines, marine offshore platforms, and pharmaceutical / food-grade processing. Its corrosion resistance, high-temperature strength, and weldability make it the default for service conditions outside the carbon and standard-stainless envelope.

Form Factors Available

• Bolts — hex, heavy hex, socket, button, countersunk; M6–M100 / 1/4"–4"
• Nuts — standard, heavy, jam, locking variants (nyloc, all-metal, flange)
• Screws — cap, machine, set, shoulder, self-tapping; all common drive types
• Washers — plain, spring, lock, Belleville, fender, tab
• Studs & threaded rod — ASTM A193 / A320 / A453 / A540
• Custom forgings — rings, blanks, shaped components to drawing

Standards & Certification

Alloy 20 fasteners are supplied with EN 10204 3.1 (mill cert) or 3.2 (third-party witnessed) material test reports as standard. Additional certification packages: NACE MR0175 / ISO 15156, NORSOK M-650, API 6A (wellhead), API 20E (subsea bolting), PED 2014/68/EU. Third-party inspection by TUV, Lloyd's, BV, DNV, SGS, and Intertek arrangeable on order.