Jan 22 2013
Topics CoveredIntroductionChemical CompositionPhysical propertiesMechanical PropertiesThermal PropertiesOther DesignationsFabrication and Heat Treatment Machinability Forming Welding Forging Hot Working Cold Working HardeningApplications
Super alloys or high performance alloys consist of a number of elements in different combinations to obtain the desired result. They have good creep and oxidation resistance, and can be strengthened by solid-solution hardening, precipitation hardening, and work hardening. Cobalt-based, nickel-based, and iron-based alloys are three types of super alloys. The cobalt-based super alloys provide good hot corrosion resistance especially in gas turbine areas as they contain high level of chromium. The iron-based alloys are strengthened by intermetallic compound precipitation in fcc matrix. The nickel-based alloys contain solutes such as titanium and/or aluminum.
Ultimet (r) alloy has high strength and wear and corrosion resistance. The following datasheet gives an overview of Ultimet(r) alloy.
The chemical composition of Ultimet(r) alloy is outlined in the following table.
The physical properties of Ultimet (r) alloy are given in the following table.
The following table displays the mechanical properties of mill annealed Ultimet(r) alloy.
|Yield strength (@ strain 0.200%)
|Elastic modulus (@ 649°C/1200°F)
|Elongation at break (in 50.8 mm)
|Hardness, Brinell (converted from Rockwell C hardness)
|Hardness, Knoop (converted from Rockwell C hardness)
|Hardness, Rockwell C
|Hardness, Vickers (converted from Rockwell C hardness)
The thermal properties of Ultimet(r) alloy are given in the following table.
|Thermal expansion co-efficient (@ 26-316°C /78.8-601°F)
||85.4 BTU in/hr.ft².°F|
Other designations that are equivalent to Ultimet(r) alloy include:
Fabrication and Heat Treatment
Ultimet(r) alloy has machining characteristics similar to that of nickel-based alloys.
Ultimet(r) alloy can be cold formed using conventional methods.
Ultimet(r) alloy can be welded using all conventional techniques.
Forging of Ultimet(r) alloy is performed similar to that of nickel-based alloys
Ultimet(r) alloy is hot worked similar to that of nickel-based alloys.
Ultimet(r) alloy can be cold formed in the form of strip or sheet.
Ultimet(r) alloy is strengthened and hardened only by cold working.
Ultimet(r) alloy is used in industrial components such as valves, mixers, nozzles, and slurry pumps.