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.