Customization: | Available |
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Processing Object: | Metal |
Molding Style: | Forging |
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NIMONIC® alloy 263 (UNS N07263/W. Nr. 2.4650), an air melted nickel-base alloy, was developed by Rolls-Royce (1971) Ltd. to provide a sheet material which could be readily fabricated and would offer improved ductility in welded assemblies to replace NIMONIC alloy 80A. It was designed as sheet material to meet specific design criteria in terms of proof stress and creep strength. It is now available in all standard forms.The welding techniques for this alloy are similar to those in common use for other age-hardenable nickelbase alloys. During salvage welding operations, a preweld heat-treatment is not necessary on age-hardened
assemblies but a subsequent age-hardening treatment is desirable after all salvage welding is completed.Material will age in service if temperatures are above 750°C.
Composition, %
Carbon ........................................................................0.04-0.08
Silicon .........................................................................0.40 max.
Manganese .................................................................0.60 max.
Sulfur ........................................................................0.007 max.
Silver .......................................................................0.0005 max.
Aluminum....................................................................0.60 max.
Boron ........................................................................0.005 max.
Bismuth...................................................................0.0001 max.
Cobalt..........................................................................19.0-21.0
Chromium....................................................................19.0-21.0
Copper........................................................................0.20 max.
Iron................................................................................0.7 max.
Molybdenum ...................................................................5.6-6.1
Lead........................................................................0.0020 max.
Titanium...........................................................................1.9-2.4
Aluminum and titanium ...................................................2.4- 2.8
Nickel............................................................................Balance*
Physical Properties
Density, g/cm3..............................................................................8.36
lb/in3.............................................................................0.302
Melting Range
Liquidus temperature, °C........................................................1355
Solidus temperature, °C..........................................................1300
Specific Heat, J/kg, °C.................................................................461