{"id":3571,"date":"2026-09-16T11:01:41","date_gmt":"2026-09-16T08:01:41","guid":{"rendered":"https:\/\/www.defencemetal.com\/index.php\/en\/monel-400\/"},"modified":"2026-09-25T16:28:41","modified_gmt":"2026-09-25T13:28:41","slug":"monel-400","status":"publish","type":"page","link":"https:\/\/www.defencemetal.com\/index.php\/en\/monel-400\/","title":{"rendered":"Monel 400"},"content":{"rendered":"

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Monel 400 \/ (2.4360) \/ UNS N04400 \/ AMS 4675 \/ AMS 4544<\/h1>\n
DEFENCE METAL<\/span><\/p>\n
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Monel 400<\/div>\n
UNS N04400 \u00b7 W.Nr. 2.4360 (some sources also give 2.4361 for the same alloy) \u00b7 NiCu30Fe (DIN\/EN) \u00b7 BS NA13 \u00b7 ISO NW4400 \u00b7 Ni(+Co) 63% min \u2013 Cu 28-34% \u2013 Fe 2.5% max \u2013 Mn 2.0% max \u2013 C 0.3% max \u2013 Si 0.5% max \u2013 S 0.024% max.<\/div>\n
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Not to be confused with<\/div>\n

Monel K500<\/a><\/div>\n<\/div>\n

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For what<\/div>\n
Nickel-copper SOLID SOLUTION alloy. It is NOT PRECIPITATION HARDENABLE; its strength comes from the Ni-Cu matrix and from cold work, and it cannot be strengthened by ageing.<\/div>\n<\/div>\n
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Forms<\/div>\n
Round bar \u00b7 flat bar \u00b7 plate \u00b7 sheet \u00b7 tube and pipe \u00b7 forgings. All forms are supplied to order.<\/div>\n<\/div>\n
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Standards<\/div>\n
AMS 4544<\/b> \u2014 sheet, strip and plate; ANNEALED (67Ni-30Cu). \u00b7 AMS 4675<\/b> \u2014 bars (2.35-100.00 mm) plus forgings and forging stock (67Ni-30Cu). \u00b7 AMS 4574<\/b> \u2014 seamless tubing; ANNEALED (67Ni-31Cu). \u00b7 AMS 4575<\/b> \u2014 BRAZED tubing; ANNEALED (67Ni-31Cu). \u00b7 AMS 4730<\/b> \u2014 wire; ANNEALED (67Ni-31Cu, alloy 400). \u00b7 AMS 4731<\/b> \u2014 wire and ribbon; ANNEALED (67Ni-31Cu, Monel 400). \u00b7 ASTM B127 \/ ASME SB-127 \u2014 plate, sheet and strip. \u00b7 ASTM B164 \/ ASME SB-164 \u2014 rod, bar and wire. \u00b7 ASTM B165 \/ ASME SB-165 \u2014 seamless pipe and tube. \u00b7 ASTM B163 \/ ASME SB-163 \u2014 condenser and heat-exchanger tube. \u00b7 ASTM B725 \/ ASME SB-725 \u2014 welded pipe. \u00b7 ASTM B730 \/ ASME SB-730 \u2014 welded tube. \u00b7 ASTM B564 \/ ASME SB-564 \u2014 forgings. \u00b7 ASTM B366 \/ ASME SB-366 \u2014 welded fittings. \u00b7 ASTM B751, B775, B829 \u2014 general requirements for tubular products. \u00b7 DIN 17743, 17750, 17752, 17753, 17754 \u00b7 VdTUV Material Sheet 263. \u00b7 QQ-N-281 (Class A and Class B) \u00b7 MIL-T-1368. \u00b7 NACE MR0175 \/ ISO 15156 and MR0103.
AMS 4674 (67Ni-30Cu-0.04S, free machining) is NOT N04400; it covers the sulphur-bearing free-machining Monel R-405 (UNS N04405), which some distributor lists wrongly file under 400.<\/span><\/div>\n<\/div>\n
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Advantage<\/div>\n
Having no chromium, it is weak in oxidising media, but it works in reducing media: it is one of the few commercial alloys usable in de-aerated hydrofluoric acid at ALL concentrations up to the boiling point.<\/div>\n<\/div>\n
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Welding<\/div>\n
Filler metal: AWS A5.14 ERNiCu-7 (UNS N04060; Monel Filler Metal 60 \/ VDM FM 60, W.Nr. 2.4377) for GTAW, GMAW and SAW. Covered electrode: AWS A5.11 ENiCu-7 (Monel Welding Electrode 190). INCOFLUX 5 is used as the flux for submerged-arc welding. Shielding gas is argon with at most 3% H2;<\/div>\n<\/div>\n
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Limits<\/div>\n
NOT FOR OXIDISING SERVICE \u2014 there is no chromium. Nitric acid above 0.5% concentration attacks the alloy rapidly. Oxidising salts in sulphuric acid (ferric sulphate, chromates, dichromates, nitrates, nitrites, peroxides, cupric salts) and ferric chloride make the solution highly corrosive; aeration raises the corrosion rate.<\/div>\n<\/div>\n
REQUEST A QUOTE<\/a>All nickel alloys →<\/a>TECHNICAL DETAILS ↓<\/span><\/div>\n
Compiled from manufacturer data sheets \u00b7 confirm against the current specification before ordering<\/div>\n<\/div>\n<\/div>\n

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