Jul 30 2013
Topics Covered
Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Other Designations
Fabrication
Machinability
Welding
Hot working
Cold working
Annealing
Applications
Introduction
MONEL alloys are solid solution alloys that can be hardened by subjecting them to cold working. There are different types of MONEL alloys available commercially, namely, MONEL 400, 401, 404, R-405, 450 and K-500. The standard forms of MONEL alloy are hexagon, flats, forging stock, tube and pipe.
MONEL 401 is designed for use in special electric and electronic applications. The common forms of MONEL 401 alloy are strip and wire. This datasheet will look into the chemical composition, properties and applications of MONEL 401 alloy.
Chemical Composition
The chemical composition of MONEL 401 alloy is given in the following table.
|
Element |
Content (%) |
|
Nickel, Ni |
40 – 45 max |
|
Copper, Cu |
Remainder |
|
Manganese, Mn |
2.25 max |
|
Iron, Fe |
0.75 max |
|
Silicon, Si |
0.25 max |
|
Cobalt, Co |
0.25 max |
|
Carbon, C |
0.10 max |
|
Sulfur, S |
0.015 max |
Physical Properties
The following table discusses the physical properties of MONEL 401 alloy.
|
Properties |
Metric |
Imperial |
|
Density |
8.89 gm/cm3 |
0.319 lb/in3 |
Mechanical Properties
The mechanical properties of MONEL 401 alloy are tabulated below.
|
Properties |
Metric |
Imperial |
|
Tensile strength(annealed) |
441 MPa |
64 ksi |
|
Yield strength |
134 MPa |
19 ksi |
Other Designations
Some of the other designations that are used to denote MONEL 401 alloy are as below:-
Fabrication
Machinability
Conventional machining techniques used on iron alloys may be used for this alloy.
Welding
Alloy 401 is readily autogenously welded into thin sections. Gas-tungsten-arc welding is the commonly used procedure. Resistance welding is a satisfactory method for this alloy.
Hot working
May be hot worked if needed.
Cold working
Cold working may be done using standard tooling and soft die materials for better finish.
Annealing
MONEL 401 alloy should be annealed at 760°C (1400°F) for one hour for recovery from cold working.
Applications
The MONEL 401 alloy is used in the following applications:
-
Wire wound resistors
-
Bimetal contacts
-
Electric and electronic applications.