Alloy 400, also known as Monel 400, is a nickel-copper alloy that is highly resistant to a variety of corrosive conditions, making it suitable for a wide range of applications.
It is composed of approximately 63% nickel and 28-34% copper, with small amounts of other elements such as iron, manganese, and silicon. This alloy was one of the first nickel-copper alloys developed and remains popular due to its unique combination of properties.
Alloy 400 is known for its excellent resistance to various corrosive environments, including seawater, acids (sulfuric, hydrochloric, etc.), alkaline solutions, and many other chemicals. This makes it ideal for applications in marine, chemical processing, and oil and gas industries.
Available tube product forms
Typical Applications
Typical manufacturing specifications
- ASTM B163
- ASTM B165
- AMS 4574
- BS3074
Industries predominantly using this grade
Technical Data
Mechanical Properties
| Temper |
Annealed |
| Tensile Rm |
70 |
ksi (min) |
| Tensile Rm |
480 |
MPa (min) |
| R.p. 0.2% Yield |
28 |
ksi (min) |
| R.p. 0.2% Yield |
195 |
MPa (min) |
| Elongation (2” or 4D gl) |
40 |
% (min) |
Physical Properties (Room Temperature)
| Specific Heat (0-100°C) |
427 |
J.kg-1.°K-1 |
| Thermal Conductivity |
21.8 |
W.m -1.°K-1 |
| Thermal Expansion |
13.9 |
μm/μm/°C |
| Modulus Elasticity |
173 |
GPa |
| Electrical Resistivity |
5.47 |
Ohm-cm |
| Density |
8.83 |
g/cm3 |
Chemical Composition (% by weight)
| Element |
Min |
Max |
| C |
- |
0.3 |
| Si |
- |
0.5 |
| Mn |
- |
2 |
| S |
- |
0.24 |
| Cu |
Balance |
| Fe |
- |
2.5 |
| Ni |
63 |
70 |