Wire – INCOLOY® 25-6MO Alloy

Wire – INCOLOY® 25-6MO Alloy

INCOLOY® 25-6MO Alloy

UNS N08926
W.Nr 1.4529


Marine/offshore platform equipment, Desalination equipment, Heat exchangers, Pipes, Paper processing equipment, Caustic chloride systems, Springs


INCOLOY® 25-6MO alloy is an iron-base super-austenitic stainless steel with resistance to a wide range of corrosive environments. Alloying additions of molybdenum and nitrogen protect from pitting/crevice corrosion, and copper provides resistance to sulfuric acid conditions. INCOLOY® 25-6MO has improved performance compared to 316 stainless steel, while remaining a cost-effective alternative to other nickel-based alloys.

Industries Supplied

Chemical Processing, Oil & Gas, Nuclear Power Generation, Food Processing

Nominal Composition

C: 0.02 max
Mn: 2.0 max
Si: 0.50 max
P: 0.03 max
S: 0.01 max
Ni: 24.0 – 26.0
Cr: 19.0 – 21.0
Mo: 6.0 – 7.0
Cu: 0.5 – 1.5
N: 0.15 – 0.25
Fe: Bal min

Physical Properties

Density: 0.290 lb/in3, (8.03 g/cm3)

Modulus of Elasticity (E):
At 70°F (20°C): 27.2 x 103 ksi (188 GPa)

Modulus of Rigidity (G)
At 70°F (20°C): 10.3 x 103 ksi (71 GPa)

Coefficient of Expansion:
9.26 µin/in-°F (70-1100°F)
16.7 µm/m-°C (25-600°C)

Electrical Resistivity: 31.4 µohm-in, (80.0 µohm-cm)

Thermal Conductivity: 79.8 Btu-in/ft2-hr-°F, (11.5 W/m-°C)

Applicable Specifications

Wire & Bar: ASTM B649

Typical Mechanical Properties

  • Annealed
    • Heat Treatment: 1950-2156°F (1066-11800°C)
    • Tensile Strength: 90-120 ksi (620-827 MPa)
    • Suggested Operating Conditions: -320°F to 800°F (-196°C to 427°C)
  • Spring
    • Heat Treatment: Stress Relieve
      800-900°F (427-482°C)
    • Tensile Strength: 190 ksi min (1034 MPa)
    • Suggested Operating Conditions: Up to 800°F (427°C)

INCOLOY® is a registered trademark of Special Metals Corporation group of companies.

For further information Contact:

Contact Us
Phone: 1 847 695 1900
Elgiloy Specialty Metals – Wire Products
356 N.Cross Street
Sycamore, IL 60178 USA

Limitation of Liability and Disclaimer of Warranty:
• The content in these data sheets is provided primarily by third-party melting mills and is provided for reference only. It is not intended for engineering or design.
• Applications may be discussed, however, Elgiloy Specialty Metals, a Division of Combined Metals of Chicago L.L.C., does not recommend or endorse any material for any particular end use or application.
• The data included in this data sheet are typical values and may vary.
• Elgiloy Specialty Metals, a Division of Combined Metals of Chicago L.L.C., makes no representations or warranties, express or implied, as to the accuracy, completeness, condition, suitability, performance, fitness for a particular purpose, or merchantability of any information contained in any data sheet.
• In no event will Elgiloy Specialty Metals, a Division of Combined Metals of Chicago L.L.C., be liable for any damages whatsoever arising from the use of the information included in the data sheets.