Haynes® 25 L-605 UNS R30605

Haynes® 25 (L-605) is a cobalt based alloy that combines good forming and excellent high temperature properties.

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Strip, Coil, Foil, Wire, AMS 5537



Haynes® 25 (L-605) is a cobalt based alloy that combines good forming and excellent high temperature properties. The alloy is resistant to oxidation and carburization to 1900 °F. Alloy 25 can only be hardened significantly by cold working. Cold working will increase creep strength up to 1800 °F and stress rupture strength uo to 1500 °F. Strain aging at 700 - 1100 °F improve creep and stress rupture strengths below 1300 °F.

Chemistry Typical

Cobalt: Remainder
Chromium: 19.00-21.00
Nickel: 9.00-11.00
Tungsten: 14.00-16.00
Manganese: 1.00-2.00
Iron: 3.00 max
Silicon: 1.00 max
Carbon 0.05-0.15
Sulfur: 0.03
Phosphorus: 0.03 max

Physical Properties

Density: 0.330 lbs/in3, 9.13 g/cm3

Electrical Resistivity: micro-ohm-in, (micro-ohm-cm)
75 °F (24 °C): 34.9 (89)

Mean Coefficient of Thermal Expansion: µin/in-° F (µm/m-° C)
70 - 200 °F (21 - 93 °C): 6.8 (12.3)
70 - 400 °F (21 - 204 ° C): 7.2 (12.9)
70 - 600 °F (21 - 316 ° C): 7.6 (13.5)
70 - 800 °F (21 - 427 ° C): 7.8 (13.9)
70 - 1000 °F (21 - 538 ° C): 8.0 (14.4)
70 - 1200 °F (21 - 649 ° C): 8.2 (14.8)
70 - 1400 °F (21 - 760 ° C): 8.6 (15.5)
70 - 1600 °F (21 - 871 ° C): 9.1 (16.2)
70 - 1800 °F (21 - 982 ° C): 9.4 (17.7)

Thermal Conductivity: BTU-in/ft-° F (watt-cm./cm.2-°C)
300° F (200°C): 82(.130)
500° F (300°C): 97(.147)
700° F (400°C): 112(.166)
900° F (500°C): 127(.185)
1100° F (600° C): 142(.204)
1300° F (700° C): 157(.224)
1500° F (800° C): 172(.244)
1700° F (900° C): 191 (.265)

Modulus of Elasticity: ksi (MPa)
32.6 x 103 (224 x 103) in tension

Melting Point: 2425-2570° F (1329-1410° C)


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

Mechanical Properties at Room Temperature

Properties: Annealed

Ultimate Tensile Strength: 130 KSI min (896 MPa min)
Yield Strength (0.2% offset):
Gauges: less than 0.003 inches: 55 KSI min (379 MPa min)
Gauges: 0.003 inches and greater: 55 - 80 KSI (379 - 552 MPa)
Elongation: Consult Ulbrich Technical Services

Properties: Tempered

Haynes® 25 (L-605) can be cold rolled to various tempers. Contact Ulbrich Technical Service for additional information .

Additional Properties

Corrosion Resistance

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 is not removed from tempered wire to act as a lubricant.
* Contact Ulbrich Wire for custom finishes.

Cold Forming

Haynes® 25 (L605) may be cold or hot-formed by various techniques.


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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