Monel 400 Bolts manufactured at TorqBolt are corrosion resistant,high temperature resistant with ultimate tensile strength.
Dimensional standards as per DIN 931,DIN 933,BS 1768,UNI 5731,UNI 5737,UNI 5739,ISO 4014,ISO 4017,BS 1769,BS 3692 are provided.
The raw material of these fasteners is renowned as registered trademarks like monel alloy 400. Being a PED certified Fasteners Manufacturer by TUV Rheinland,our fasteners are accompanied with EN 10204 3.1/3.2 certification. Monel 400 Bolts are available in hot forged,cold forged and bar stock machined conditions depending upon the order quantity.
Monel Alloy 400 Is A Nickel-copper Alloy That Has High Strength And Extreme Corrosion Resistance In A Range Of Media, Including Sea Water, Hydrofluoric Acid, Sulphuric Acid, Sulphuric Acid And Alkalis And Hence It Has Variety Of Industrial Applications. Used For Marine Engineering, Chemical And Hydrocarbon Processing Equipment, Valves, Pumps, Shafts, Fittings, Fasteners And Heat Exchangers.
Monel 400 bolts are externally threaded fasteners with an integral head, manufactured per ASME B18.2.1, ISO 4014/4017, and DIN 933/931. TorqBolt produces Monel 400 bolts in metric (M6–M100) and imperial (1/4"–4") diameters with custom lengths from 10 mm up to 3000 mm.
Head Styles Available
Hex head — ASME B18.2.1, the workhorse for general bolting
Heavy hex head — thicker head for high-load joints, ASTM A325 / A490 patterns
Socket head cap (SHCS) — ASME B18.3 / DIN 912, ideal where space is limited
Monel 400 bolts are supplied with full or partial threading. Full-thread (UNC, UNF, ISO metric coarse/fine) for tension-only joints; partial-thread shank for shear loads where the unthreaded grip carries the load. Thread fits per ASME B1.1 (Class 2A) or ISO 965 (6g) by default; tighter Class 3A / 4h6h fits available on request. Engagement length follows the 1.5×D rule for tapped holes; 1.0×D minimum on through-bolting.
Mechanical Performance
Monel 400 bolts achieve characteristic tensile strength, yield, and elongation per the source-material spec, with proof-load testing and hardness verification per ASTM F606 / ISO 898-1. Torque-tension calibration is published per ASME PCC-1 for critical joints. Each lot ships with EN 10204 3.1 (or 3.2 on request) certificates listing chemistry, mechanicals, hardness, and dimensional inspection.
Custom Configurations
TorqBolt can produce Monel 400 bolts to drawing, with non-standard heads, drilled-shank variants, double-end, captive, or matched-set configurations. Coatings include zinc, PTFE, Xylan, hot-dip galvanized, and electroless nickel. NACE MR0175 / ISO 15156 sour-service certification on request.
Monel — Nickel-Copper Alloys
Monel alloys are 67% Ni / 33% Cu solid-solution alloys distinguished by uniform corrosion resistance in seawater, hydrofluoric acid, alkalis, and salt brines — environments where stainless steels fail by chloride pitting or copper-bearing alloys fail to alkalis. Monel was the first commercial nickel alloy and remains the default for offshore + chemical-processing fasteners requiring HF resistance.
Monel 400 (UNS N04400) is the base composition supplied in the as-annealed or hot-finished temper. Yield strength is moderate (~240 MPa min) but toughness extends to cryogenic service. Monel K-500 (N05500) adds Al + Ti for γ' precipitation hardening, raising yield to ~620 MPa after age hardening per AMS 4676 — the standard for high-strength shafting and fasteners in seawater. Monel R-405 is a free-machining variant.
Monel fasteners are produced per ASTM B164 (rod/bar) and supplied with EN 10204 3.1 / 3.2 certificates including stress-corrosion testing. Galvanic compatibility with copper-nickel piping makes Monel the natural mate for naval, desalination, and salt-evaporator service. NACE MR0175 sour-service compliance maintained when stress is below the SSC threshold for the specific heat-treat condition.
