NIMONC Alloy 263

NIMONIC alloy 263 is a precipitation-hardenable nickel-chromium-cobalt alloy with an addition of molybdenum for solid-solution strengthening. It has high strength and corrosion resistance along with good formability and high-temperature ductility in welded structures. The alloy is especially suitable for sheet applications. Used in gas turbines for rings, casings, and various sheet fabrications.

Chemical Composition, (%)
The composition in BS HR 10 is as follows:

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

Density

The density values are the mean of 24 determinations on
sheet and forged material. No significant difference in
density between annealed and fully heat-treated sheet was
detected. Compositional variation within the release
specification was reflected in a density range of 8.33 to
8.39 g/cm3

.
Melting Range

The liquidus temperature was determined by inverse
cooling and the solidus by metallographic examination.
The accuracy of determination was +/-5C for the liquidus
temperature, and +0, -10C for the solidus temperature.

Specific Heat
Approximately 461 J/kg C in the range 20-100C.

Available Products
NIMONIC alloy 263 is generally available in the following
forms:
bars and billets for forging
rods and bars for machining
extruded section, rectangular or profiled for machining,
rolling and welding to rings etc.
hot-rolled plate and sheet
cold-rolled sheet and strip
cold-worked tube
cold-drawn wire and filler wire
Forms not mentioned above may be supplied to order.
Minimum production quantities may apply.

Specifications
NIMONIC alloy 263 is designated UNS N07263/W. Nr. 2.4650 and is covered by the following Specifications:

Rod, Bar, Billet, Wire and Forgings - BS HR 10 (bar, billet, forgings & parts), AECMA PrEn 2199 & 2201 (bar), AECMA PrEn 2200 (forgings), DIN 17752 (rod & bar), DIN 17753 (wire), DIN 17754 (forgings)

Plate, Sheet and Strip - BS HR 206 (plate, sheet & strip), AECMA PrEn 2203 (sheet & strip), AECMA PrEn 2418 (plate), DIN 17750 (plate, sheet & strip), SAE AMS 5872 (plate, sheet & strip)

Pipe and Tube - BS HR 404 (seamless tube), AECMA PrEn 2202 (tube), DIN 17751 (pipe and tube)

Composition - DIN 17744