Haynes® 263 (Alloy 263) Wire UNS N07263

Alloy 263 is a nickel-cobalt-chromium-molybdenum alloy designed specifically to combine very good strength properties with excellent fabrication characteristics in the annealed condition.

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Shaped, Flat, Square, Round, Fine Wire, Plated and Bare wire AMS 5872, AMS 5886, MSSR 7036

Haynes® 263 or Alloy 263 Description

Alloy 263 is a nickel-cobalt-chromium-molybdenum alloy designed specifically to combine very good strength properties with excellent fabrication characteristics in the annealed condition. The alloy is also age hardenable. While its strength at elevated temperatures is not quite as high as materials such as Waspaloy or alloy R-41, it is far easier to form and weld. Alloy 263 exhibits excellent intermediate temperature tensile ductility, and is not normally subject to strain age cracking problems common for gamma prime strengthened alloys.


Gas turbine components
Heat treat equipment
High temperature/high strength applications

Chemistry Typical

Nickel: Balance
Cobalt: 19.00 – 21.00
Chromium: 19.00 – 21.00
Molybdenum: 5.60 – 6.10
Titanium: 1.9-2.4
Titanium + Carbon: 0.04-0.08
Aluminum: .0.60 max
Manganese: 0.60 max
Silicon: 0.40 max
Iron: 0.70 max
Boron: 0.005 max
Copper: 0.20 max
Sulfur: 0.007 max
Silver: 0.0005 max
Bismuth: 0.0001 max

Physical Properties

Density: 0.302 lbs/in³, 8.36 g/cm³

Electrical Resistivity: micro-ohm-in, (micro-ohm-cm): 70°F
(21°C): 45.3(115)

Mean Coefficient of Thermal Expansion: µin/in-°F (µm/m-°C)
70-200°F (25-100°C): 6.2(11.1)
70-400°F (25-200°C): 6.7(12.1)
70-600°F (25-300°C): 7.1(12.7)
70-800°F (25-400°C): 7.2(12.8)
70-1000°F (25-500°C): 7.6(13.6)
70-1200°F (25-600°C): 7.9(13.9)
70-1400°F (25-700°C): 8.3(14.7)
70-1600°F (25-800°C): 9.0(15.4)
70-1800°F (25-900°C): 9.9(17.0)

Thermal Conductivity: BTU-in/ft-°F (W/m-°K)
70°F (21°C): 81(11.7)
200°F (100°C): 89(13.0)
400°F (200°C): 103(14.7)
600°F (300°C): 115(16.3)
800°F (400°C): 128(18.0)
1000°F (500°C): 141(19.7)
1200°F (600°C): 154(21.2)
1400°F (700°C): 167(23.0)
1600°F (800°C): 182(24.7)
1800°F (900°C): 195(26.8)

Modulus of Elasticity: KSI (MPa)
32.1 x 10³ (221 x 10³) in tension
Melting Range: 2370-2470°F (1300-1355°C)

Mechanical Properties at Room Temperature

Annealed: Typical

Ultimate Tensile Strength: *
Yield Strength: (0.2% offset) *
Elongation: *
Gauges up to 0.010 inches: HV 256 max
Gauges over 0.010 inches: Rb 100 max
* Contact Ulbrich Wire for additional information


Alloy 263 can be cold rolled to achieve the temper properties required by specific customers and/or manufacturing requirements. Contact Ulbrich Wire for details.

Heat Treat Capabilities: Typical

Aged at 1472°F
Yield Strength: (0.2% offset): 87 KSI nom (600 MPa nom)
Elongation: 37% nom

Additional Properties

Corrosion Resistance

Alloy 263 exhibits good resistance to oxidizing combustion gas environments at
temperatures up to about 1600°F (870°C). Refer to NACE (National Association of Corrosion Engineers) for additional recommendations.

Standard Wire Finishes

Extra Clean: Extra clean is also referred to as “bright annealed” or “bright annealed and cold rolled”

Grease (round wire only): Drawn in a heavy grease produces an “Ultra bright” finish for decorative applications

Soap (round wire only): Soap is used as a lubricant in the drawing process and is not removed. It acts as a lubricant during customer part forming operation.

A soap finish is available in tempered products.
Plated: Many plating options are available.
*Special finishes are available: Contact Ulbrich Wire Sales with special finish and plating requests.


Continuous Coils
Cut to lengths
Precision cutting
Cold Forming
Alloy 263 has excellent forming characteristics. The alloy has excellent ductility in the annealed condition, and thus may also be formed by cold working. Intermediate annealing in the temperature range from 1900 to 2000°F may be needed for complex component forming operations. All hot or cold-worked parts should be annealed and rapidly cooled in order to restore the best balance of properties.


Alloy 263 can be welded by both manual and automatic welding methods, including gas tungsten arc (TIG), gas metal arc (MIG), electron beam and resistance welding. Matching composition filler wire is generally used for welding alloy 263. For best results refer to: SSINA’s “Welding of Stainless Steels and Other Joining Methods”
*Haynes® Alloy 263 is a registered trademark of Haynes Alloys

Limitation of Liability and Disclaimer of Warranty: In no event will Ulbrich Stainless Steelsand Special Metals, Inc., be liable for any damages arising from the use of the information included in this document or that it is suitable for the ‘applications’ noted. We believe the information and data provided to be accurate to the best of our knowledge but, all data is considered typical values only. It is intended for reference and general information and not recommended for specification, design or engineering purposes. Ulbrich assumes no implied or express warranty in regard to the creation or accuracy of the data provided in this document.

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