ISO/TR 15608 Material Group 42 such as Monel 400 alloy:
Nickel-copper alloys (Ni-Cu) with Ni ≥ 45 % and Cu ≥ 10 %
Alloy 400 is a single-phase, solid solution, nickel-copper alloy.
Corrosion resistance of Monel 400
Alloy 400 has excellent resistance to neutral and alkaline salts and has long been the standard material for salt production systems.
Alloy 400 is one of the few materials which can be used in contact with fluorine, hydrofluoric acid and hydrogen fluoride or their compounds. The material has a very high resistance to alkaline media. Its behavior in seawater is also excellent compared to copper-based alloys with an increased resistance to cavitation. Alloy 400 can be used in contact with highly diluted mineral acids, such as sulfuric and hydrochloric acid, provided that they are not ventilated.
Weldability of Monel 400
Alloy 400 is It has to be ensured that work is performed using targeted heat application and low heat input e.g. max. 8 kJ/cm at TIG-Welding. The interpass temperature should not exceed 150 °C.
Typical material in group 42
| Name | Number | Standard | Products | Alloy | Remarks |
|---|---|---|---|---|---|
| NiCu30Fe – – – – – – – – | 2.4360 N04400 N04400 N04400 N04400 N04400 N04400 N04400 N04400 | DIN 17743 ASTM B-127 ASTM B-163 ASTM B-164 ASTM B-165 ASTM B-366 ASTM B-564 ASTM B-725 ASTM B-730 | Plate Plate Smls. tubes Bar Smls. pipe and tube Fittings Forgings Welded pipe Welded tube | – MONEL® Alloy 400 MONEL® Alloy 400 MONEL® Alloy 400 MONEL® Alloy 400 MONEL® Alloy 400 MONEL® Alloy 400 MONEL® Alloy 400 MONEL® Alloy 400 | EN 13445-10: PMA ASME BPVC ASME BPVC ASME BPVC ASME BPVC ASME BPVC ASME BPVC ASME BPVC ASME BPVC |
| NiCu30Al – | 2.4375 N05500 | – ASTM B-865 | – Bar | – Monel® K-500 /VDM® Alloy K-500 | EN 13445-10: PMA ASME BPVC |
| – | N04405 | ASTM B-164 | Rod & wire | N04405 | ASME BPVC |
| GNiCu30Nb M35-1 | 2.44365 N24135 | – ASTM A-494 | Casting Casting | – M35-1 | EN 13445-10: PMA ASME BPVC |
| M35-2 | N04020 | ASTM A-494 | Casting | M35-2 | ASME BPVC |
| M30C | N24130 | ASTM A-494 | Casting | M30-C | ASME BPVC |