Introduction
Monel 400 is a Nickel-Copper alloy with high strength and excellent corrosion resistance in a range of acidic and alkaline environments and especially suitable for reducing conditions. It also has good ductility and thermal conductivity.
Chemical Composition of Monel 400
The compositional range for Monel 400 is provided in the table below.
| Element |
Content |
| Ni |
63 % min |
| Cu |
28 - 34 % |
| Fe |
2.5 % max |
| Mn |
2 % max |
Typical Properties of Monel 400
Typical properties of Monel 400 are covered in the following table.
| Property |
Metric |
Imperial |
| Density |
8.8 g/cm3 |
0.318lb/in3 |
| Melting point |
1350°C |
2460°F |
| Co-Efficient of Expansion |
13.9µm/m.°C
(20-100°C) |
7.7x10-6 in/in.°F
(70-212°F) |
| Modulus of rigidity |
65.3 kN/mm2 |
9471 ksi |
| Modulus of elasticity |
105-120 kN/mm2 |
15230-17405 ksi |
Properties of Supplied Materials and Heat Treated Materials
| Condition of Supply |
Heat Treatment (After Forming) |
| Annealed/Spring Temper |
Stress relieve at 300-320°C (570-610°F) for 1 hour and air cool. |
| Condition |
Approx Tensile Strength |
Approx Service Temp. |
| Annealed |
400 - 600 N/mm2 |
58 - 87 ksi |
-200 to +230°C |
-330 to +445°F |
| Spring Temper |
850 - 1050 N/mm2 |
123 - 152 ksi |
-200 to +230°C |
-330 to +445°F |
Relevant Standards
Monel 400 is covered by the following standard:
BS 3075
3076 NA 13
DTD 204B
ASTM B164
Equivalent Materials
Equivalent materials to Monel 400 are:
W.NR 2.4360
W.NR 2.4361
UNS N04400
AWS 040
Applications of Monel 400
Monel 400 typically finds application in:
Marine Engineering
Chemical Processing
Hydro-carbon Processing
Heat Exchangers
Valves
Pumps
Audited Supplier 
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