Nov 29 2012
Topics Covered
Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties
Other Designations
Fabrication and Heat treatment
Machinability
Forming
Welding
Heat Treatment
Forging
Hot Working
Cold Working
Annealing
Hardening
Applications
Introduction
Super alloys are also referred to as high performance alloys. They have good creep and oxidation resistance. Cobalt-based, nickel-based, and iron-based alloys are three types of super alloys. They have the capacity to function where high surface stability is required, and also at very high temperatures and severe mechanical stress. They are available in different shapes.
Monel(r) R-405 is a free-machining version of Monel 400. It is added with sulfur to improve its machinability. The datasheet given below provides more details about Monel(r ) R-405.
Chemical Composition
The chemical composition of Monel(r) R-405 is outlined in the following table.
|
Elements |
Content (%) |
|
Nickel, Ni |
63
|
|
Copper, Cu |
28-34 |
|
Iron, Fe |
2.50 |
|
Manganese, Mn |
2 |
|
Carbon, C |
0.30 |
|
Silicon, Si |
0.50 |
|
Sulfur, S |
0.025 - 0.060 |
Physical Properties
The physical properties of Monel(r) R-405 are given in the following table.
|
Properties |
Metric |
Imperial |
|
Density |
8.80 g/cm³ |
0.318 lb/in³ |
|
Melting point |
1338°C |
2440°F |
Mechanical Properties
The following table shows the mechanical properties of Monel(r) R-405.
|
Properties |
Metric |
Imperial |
|
Tensile Strength (annealed) |
550 MPa |
79800 psi |
|
Yield strength (@ strain 0.200%, annealed) |
240 MPa |
34800 psi |
|
Elongation at break (annealed) |
40% |
40% |
Thermal Properties
The thermal properties of Monel(r) R-405 are highlighted in the following table.
|
Properties |
Metric |
Imperial |
|
Thermal expansion co-efficient (@ 20-100°C/68-212°F) |
13.7 µm/m°C |
7.61 µin/in°F |
|
Thermal conductivity |
21.8 W/mK |
151 BTU in/hr.ft².°F |
Other Designations
Other designations that are equivalent to Monel(r) R-405 include:
-
AMS 4674
-
ASTM B164 CLASS B
-
ASTM F467
-
ASTM F468
-
QQ N281
Fabrication and Heat treatment
Machinability
Monel(r) R-405 has good machinability.
Forming
Monel(r) R-405 has excellent formability.
Welding
Monel(r) R-405 can be welded using standard welding techniques.
Heat Treatment
Monel(r) R-405 does not react to heat treatment.
Forging
Forging of Monel(r) R-405 is not recommended due to the presence of the intentional sulfur content.
Hot Working
Monel(r) R-405 should not be hot worked.
Cold Working
Monel(r) R-405 can be easily cold worked.
Annealing
Monel(r) R-405 is annealed at 927°C (1700°F) followed by air cooling.
Hardening
Monel(r) R-405 can be hardened only by cold working.
Applications
Monel(r) R-405 is used in screw machine stock for fasteners.