Nov 16 2012
Topics Covered
Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Other Designations
Fabrication and Heat Treatment
Machinability
Forming
Welding
Heat Treatment
Forging
Hot Working
Cold Working
Annealing
Aging
Applications
Introduction
Super alloys contain many elements in different combinations so as to achieve a desired result. They have the ability to function at very high temperatures and under severe mechanical stress, and also where high surface stability is required. They have good creep and oxidation resistance. There are three groups of alloys, namely cobalt-based, nickel-based, and iron-based alloys.
Nickelvac K-500™ is an age-hardenable version of Monel 400 alloy. It has high strength and sea water corrosion resistance. The following datasheet gives more details about Nickelvac K-500™.
Chemical Composition
The following table shows the chemical composition of Nickelvac K-500™.
|
Element |
Content (%) |
|
Nickel, Ni |
66 |
|
Copper, Cu |
29 |
|
Aluminum, Al |
2.7 |
|
Iron, Fe |
1 |
|
Manganese, Mn |
0.7 |
|
Tungsten, W |
0.6 |
|
Silicon, Si |
0.25 |
|
Carbon, C |
0.1 |
|
Sulfur, S |
0.01 |
Physical Properties
The physical properties of Nickelvac K-500™ are outlined in the following table.
|
Properties |
Metric |
Imperial |
|
Density |
8.45 g/cm³ |
0.305 lb/in³ |
|
Melting point |
1338°C |
2440°F |
Mechanical Properties
The mechanical properties of Nickelvac K-500™ are given in the following table.
|
Properties |
Metric |
Imperial |
|
Tensile strength |
1000 MPa |
145000 psi |
|
Yield strength (at strain 0.200%) |
655 MPa |
95000 psi |
|
Elongation at break |
22% |
22% |
|
Reduction of area |
40% |
40% |
|
Hardness, Rockwell C |
27 |
27 |
Other Designations
Other designations that are equivalent to Nickelvac K-500™ include:
-
AMS 4676
-
ASTM F467
-
ASTM F468
-
DIN 2.4375
-
MIL N-24549
-
QQ N286
Fabrication and Heat Treatment
Machinability
Nickelvac K-500™ is machined in the annealed condition.
Forming
Nickelvac K-500™ can be formed using standard methods in the annealed condition.
Welding
Nickelvac K-500™ is welded using all conventional methods in the annealed condition. After this process, stress-relief annealing is performed for the finished weldment.
Heat Treatment
Nickelvac K-500™ is heat treated by annealing. It can also be precipitation-hardened by performing aging heat treatment.
Forging
Nickelvac K-500™ is forged at 1038 to 1149°C (1900 to 2100°F) followed by quenching in water.
Hot Working
Nickelvac K-500™ is hot worked at 872 to 1149°C (1600 to 2100°F) followed by quenching in water. It should not be cooled below 872°C (1600°F).
Cold Working
Nickelvac K-500™ can be cold worked using standard methods
Annealing
Nickelvac K-500™ is annealed at 1038°C (1900°F) followed by quenching in water.
Aging
Annealed or slightly cold-worked material is age-hardened at 608°C (1125°F ) for 16 h followed by cooling in a furnace. Severely cold-worked material is aged at 538°C (1000°F) for 6 h followed by cooling in a furnace.
Applications
Super alloy Nickelvac K-500™ is used in impellers, sea water pump shafts, and oil well industry for valve trim and other components.