Inconel® alloy 625

UNS N06625
W.Nr 2.4856

Applications

Honeycomb, springs, seals, bellows, diaphragms, land-based turbine components, aircraft exhaust ducting, and heat exchangers.

Description

Inconel® 625 is a Nickel-Chromium-Molybdenum-Columbium (Niobium) alloy with excellent oxidation resistance, corrosion resistance, and strength at high temperatures. Age-hardening treatments are not required to obtain the high strength properties of Alloy 625 due to the solid solution effects of molybdenum and columbium on the nickel-chromium matrix. I625 is resistant to chloride-ion stress-corrosion cracking, pitting, and stress-corrosion cracking making it suitable for seawater applications. Inconel® 625 can operate from cryogenic temperatures to 700°F (370°C).

Industries Supplied

Automotive, Marine, Chemical Processing, Power Generation, Nuclear, and Aerospace.

Nominal Composition

C: 0.10 max
Mn: 0.50 max
Si: 0.50 max
P: 0.015 max
S: 0.015 max
Cr: 20.0 - 23.0 
Mo: 8.0 - 10.0 
Nb: 3.15 - 4.15 
Co: 1.0 max
Ti: 0.40 max
Al: 0.40 max 
Fe: 5.0 max 
Ni: Balance

Physical Properties

Density: 0.305 lb/in3, (8.44 g/cm3)

Modulus of Elasticity (E): 
At 70°F (20°C): 30.1 x 103 ksi (208 GPa)

Modulus of Rigidity (G)
At 70°F (20°C):  11.8 x 103 ksi (81.2 GPa)

Coefficient of Expansion:
7.4 µin/in.-°F (70°F to 600°F)
13.3 µm/m-°C (20°C to 538°C)

Electrical Resistivity: 50.8 µΩ.in, (129 µΩ.cm)

Thermal Conductivity: 68 Btu-in/ft2hr-°F, (9.8 W/m-K)

Applicable Specifications

Strip and Foil: ASTM B443, AMS 5599, AMS 5869, ISO 6208, EN 10095

Typical Mechanical Properties

  • Annealed
    • Heat Treatment: 1925°F (1050°C)
    • Tensile Strength: 120 - 150 ksi (830 - 1100 MPa)
    • Suggested Operating Conditions: -300°F to 700°F (-184°C to 370°C)
  • Spring Temper
  • Tensile Strength: 200 - 250 ksi (1380 - 1724 MPa)
  • Suggested Operating Conditions: -300°F to 700°F (-184°C to 370°C)

  • INCONEL® is a registered trademark of the Special Metals Corporation group of companies.

    For further information Contact:

    Email: stripinfo@elgiloy.com
    Phone: 1 888 843 2350 
    Elgiloy Specialty Metals - Strip Products
    1565 Fleetwood Dr.
    Elgin, IL 60123 USA