Inconel® 625 (Alloy 625) UNS N06625

Inconel 625 is a high strength, highly corrosion resistant nickel-chromium-molybdenum alloy used in the aerospace, oil and gas, automotive, marine, chemical processing and nuclear industries.

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Inconel 625 (Nickel 625) Strip, Foil, Wire, AMS 5599, AMS 5979, ASTM B443 Gr1 or Gr2

Gr1 -Annealed for service temps up to 1100 °F Gr2 - Solution annealed for service temps above 1100 °F where resistance to creep and rupture is required

Inconel 625 Applications


lnconel® 625 is a non-magnetic, corrosion and oxidation resistant, nickel-chromium alloy. Its outstanding strength and toughness in the temperature range from cryogenic to 2000 °F (1093 °C) are derived primarily from the solid solution effects of the refractory metals Columbium and molybdenum in a nickel-chromium matrix. The alloy has excellent fatigue strength and stress corrosion cracking to chloride ions.

Chemistry Typical

Nickel: 58.00 min
Chromium: 20.0-23.0
Iron: 5 min
Molybdenum: 8.0-10.0
Columbium + Tantalum: 3.15-4.15
Manganese: 0.50 max
Carbon: 0.10 max
Silicon: 0.50 max
Phosphorus: 0.015 max
Sulfur: 0.015 max
Aluminum: 0.40 max
Titanium: 0.40 max
Cobalt: 1 .00 max

Physical Properties of Inconel 625

Density: 0.305 lbs/in3, 8.44 g/cm3 Mean

Coefficient of Thermal Expansion: in/in/° F (m/m/°C)

68 -400 °F (20 -204 °C): 7.3 x 10·6 (13.1)
68 -600 °F (20 -315 °C): 7.5 x 10·6 (13.5)
68 -800 °F (20 -427 °C): 7.7 x 10·6 (13.9)

Magnetic Permeability H= 200 Oersted

Annealed: 1.0006

Modulus of Elasticity: ksi (MPa) in Tension
30.2 X 103 (208 X 103)

Melting Range: 2350 -2460 ° F (1290 -1350 °C)


Coil - Strip, Foil, Ribbon Wire - Profile, Round, Flat, Square

Mechanical Properties at Room Temperature

Annealed Typical

Ultimate Tensile Strength: 120 KSI min (827 MPa min)
Yield Strength: (0.2% offset) 60 KSI min (414 MPa min)
Elongation: 30% min ( gauges > 0.040inched

Properties: Tempered

lnconel® 625 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 of Inconel 625

Refer to NACE (National Associate of Corrosion Engineers) for recommendations.


#1 - Hot rolled annealed and descaled. It is available in strip, foil and ribbon. It is used for applications where a smooth decorative finish is not required.
#2D - Dull finish produced by cold rolling, annealing and descaling. Used for deep drawn parts and those parts that need to retain lubricants in the forming process. #2B - Smooth finish produced by cold rolling, annealing and descaling. A light cold rolling pass is added after anneal with polished rolls giving it a brighter finish than 2D.
#BA- Bright annealed cold rolled and bright annealed
#CBA- Course bright annealed cold rolled matte finish and bright anneal
#2 - Cold Rolled
#2BA- Smooth finish produced by cold rolling and bright annealing. A light pass using highly polished rolls produces a glossy finish. A 2BA finish may be used for lightly formed applications where a glossy finish is desired in the formed part. Polished - Various grit finish for specific polish finished requirements.
* Not all finishes are available in all alloys - Contact Ulbrich Sales for more information.

Wire Finishes

XC - Extra Clean Bright Annealed or Bright Annealed and Cold Rolled Grease - Ultra bright finish (for decorative applications) Soap - Soap coating on tempered wire to act as lubricant. * Contact Wire Sales for custom wire finishes.

Heat Treatment

lnconel® 625 cannot be hardened heat treating.

Welding Inconel 625

For best results refer to: SSINA's "Welding of Stainless Steels and Other Joining Methods".

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