Alloy C263 Sheet & Plate - Nimonic 263 - AMS 5872

Alloy C263 plate - Nimonic 263® is an age-hardenable nickel-cobalt chromium-molybdenum alloy designed specifically to combine good, aged strength properties with excellent fabrication characteristics in the annealed condition. While its strength at elevated temperatures is not quite as high as Waspaloy® or Rene 41, it is far easier to form or weld than these alloys. Alloy C263 plate - Nimonic 263®  plate exhibits excellent intermediate temperature tensile ductility, and is not normally subject to strain age cracking problems common for other gamma prime strengthened alloys. This grade is typically used for applications up to about 1650°F (900°C). This grade combines properties which make it suitable for a variety of fabricated components in both aircraft turbine engine and land-based turbine applications.

C263 Inventory Size Ranges


0.040" - 0.125"

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0.040" - 0.125"

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Standard Inventory Specifications

  • UNS N07623
  • AMS 5872

Other industry standards we comply with:

  • B50A774
  • W.Nr. 2.4650
  • Predominantly produced by AOD-ESR melt method. Hot worked, solution treated (annealed), then descaled

Common Trade Names

  • Nimonic C263®

Common Applications of C263

  • Low temperature combustors
  • Transition liners
  • Ring components

Chemical Composition

Chemical Composition of Alloy C263
Element Percent by Weight
Ni Nickel 52.00%
Co Cobalt 20.00%
Cr Chromium 20.00%
Mo Molybdenum 6% 2.4%
Ti Titanium 0.6%
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Physical Properties

Non-magnetic Alloy C263 plate - Nimonic 263 plate has high strength up to 1500ºF (816°C) and good oxidation resistance up to 1800ºF (982°C)
Characteristics This grade has excellent forming and welding characteristics.
Annealed Condition Alloy C263 nickel plate has excellent ductility and may be formed by cold working.
Density 0.302 lbs/in3, 8.36 g/cm3



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Mechanical Properties of Alloy C263

Hardness Typically 200 BHN. Grain structure is austenitic at both cryogenic and elevated temperatures.
Typical Stock Removal Rate 20 surface feet/minute with high speed tools. 80 surface feet/minute with carbide.
Care Care must be taken to ensure a rigid machine setup and sharp tools, so that work hardening and surface glazing do not occur.
Alloy C263 Plate - Nimonic 263 Plate Plate has excellent welding characteristics and can be welded by most customary techniques, such as inert gas tungsten arc (TIG), gas metal arc welding (GMAW), electron beam and resistance welding. Oxyacetylene and submerged arc processes are not recommended. Avoid excessive heat input when welding and when a filler metal is required a matching C-263 filler metal should be used. This grade is typically used in the fully aged condition. Following forming and welding, a full solution anneal prior to aging is often employed to develop optimum properties.



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*The technical data provided is for information only and not for design purposes. It is not warranted or guaranteed.