Monel 400 Fasteners

Monel 400 Fasteners, Material Overview & Form Factors

Monel 400 is a high-performance alloy used wherever standard fasteners cannot meet the corrosion, temperature, or strength envelope. TorqBolt manufactures the full Monel 400 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 Monel 400 Excels

Monel 400 is specified in oil & gas wellhead components, refinery heat exchangers, petrochemical reactors, power-generation turbines, marine offshore platforms, and pharmaceutical / food-grade processing. ASTM F468 covers alloy 400 bolts, cap screws and studs for general service, furnished as formed or stress relieved (4.2.2).

Form Factors Available

Standards & Certification

Monel 400 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.

: specification facts on this page checked against ASTM B164, ASTM F468/F468M, ASTM F467/F467M, ASTM A193/A193M, ASTM B865.

Monel, Nickel-Copper Alloys

Monel alloys are nickel-copper alloys: UNS N04400 contains 63.0 % min nickel and 28.0–34.0 % copper (ASTM B164 Table 3).

Monel 400 (UNS N04400) is the base composition. Monel K-500 (N05500) adds aluminium (2.30–3.15 %) and titanium (0.35–0.85 %) for precipitation hardening; age-hardened bar has 85–110 ksi (585–760 MPa) minimum yield depending on condition and size (ASTM B865 Tables 1 and 5). Monel R-405 (UNS N04405) is the controlled-sulfur variant, 0.025–0.060 % S (ASTM B164 Table 3).

Monel bar is supplied to ASTM B164 (400, 405) and ASTM B865 (K-500); finished bolts, screws and studs are made to ASTM F468 and nuts to ASTM F467, with EN 10204 3.1 / 3.2 certificates.

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