Nov 20 2012
Topics Covered
Introduction
Chemical Composition
Other Designations
Fabrication and Heat Treatment
Welding
Heat Treatment
Annealing
Applications
Introduction
Super alloys contain a number of elements in a variety of combinations to achieve the desired result. They are used at very high temperatures and in severe mechanical stress conditions, and also where high surface stability is required. Cobalt-based, nickel-based, and iron-based alloys are three types of super alloys. They can be strengthened by solid-solution hardening, work hardening, and precipitation hardening.
Hastelloy(r) W is a nickel-molybdenum alloy. The following datasheets gives an overview of Hastelloy(r) W.
Chemical Composition
The following table shows the chemical composition of hastelloy(r) W.
|
Elements |
Content (%) |
|
Nickel, Ni |
63 |
|
Molybdenum, Mo |
24 |
|
Iron, Fe |
6 |
|
Chromium, Cr |
5 |
|
Cobalt, Co |
2.50 |
|
Vanadium, V |
0.60 |
Other Designations
Other designations that are equivalent to Hastelloy(r) W include:
Fabrication and Heat Treatment
Welding
Hastelloy(r) W can be welded using all the conventional techniques.
Heat Treatment
Hastelloy(r) W does not respond to heat treatment.
Annealing
Hastelloy(r) W is annealed at 1185°C (2165°F) for 15 min followed by quenching in water.
Applications
Hastelloy(r) W is used as a weld metal filler rod, and can also be used in the wrought bar form for high temperature applications.