Haynes® 242 (Alloy 242) Wire UNS N10242

Alloy 242 is a nickel-molybdenum-chromium age hardenable alloy which derives strength from a log-range ordering reaction upon aging.

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Shaped, Flat, Square, Round, Fine Wire, Plated and Un-plated ASTM B434

Alloy 242® Description

Alloy 242 is a nickel-molybdenum-chromium age hardenable alloy which derives strength from a log-range ordering reaction upon aging. It has tensile and creep strength properties up to 1300°F which are as much as double for solid solution strengthened alloys, but with high ductility in the aged condition. The thermal expansion characteristics of alloy 242 are much lower than those for most other alloys, and it has very good oxidation resistance up to 1500°F.


Seal rings
Containment rings
Chemical processing: such as high temperature HF vapor containing process,
fluoroelastomer processing equipment.

Chemistry Typical

Nickel: Balance
Molybdenum: 24.00 – 26.00
Chromium: 7.00 – 9.00
Iron: 2.00 max
Cobalt: 2.50 max
Manganese: 0.80 max
Silicon: 0.80 max
Aluminum: 0.50 max
Carbon: 0.03 max
Boron: 0.006 max
Copper: 0.50 max

Physical Properties

Density, 0.327 lbs/in³, 9.05 g/cm³

Specific Heat BTU/lb.-°F( J/Kg-K):
At 70°F (21°C): 0.092 (386)

Mean Coefficient of Thermal Expansion: in/in/°F (mm/m/°C):
70-212°F (20-100°C): 6.0 x 10 (10.8)

Thermal Conductivity: BTU-in/h-ft-°F (W/m-°K):
70°F (21°C): 75.7 (11.3)

Modulus of Elasticity: KSI (MPa)
33.2 x 10³ (229 x 10³) in tension

Melting Range: 2350-2510°F (1290-1375°C)

Mechanical Properties at Room Temperature

Annealed: Typical

Ultimate Tensile Strength: 105 KSI min, (950 MPa min)
Yield Strength: (0.2% offset) 45 KSI min, 310 MPa min)
Elongation: 40% min
Grain Size: ASTM 3 min


Alloy 242 can be cold rolled to achieve the temper properties required by specific customers and/or manufacturing requirements. Contact Ulbrich Wire for details.

Additional Properties

Corrosion Resistance

Refer to NACE (National Association of Corrosion Engineers) for recommendations

Standard Wire Finishes

Extra Clean: (XC) 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

Heat Treatment

ALLOY 242 can be hardened by:
Cold working
Age hardening
Cold working and age hardening


For best results refer to: SSINA’s “Welding of Stainless Steels and Other Joining Methods”
Haynes® 242 is a registered trademark of Haynes Alloys

Limitation of Liability and Disclaimer of Warranty: In no event will Ulbrich Stainless Steels and 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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