Inconel® alloy 625

UNS N06625
W.Nr 2.4856

Applications

Springs, seals, nuclear water reactors, and aircraft ducting systems.

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 Inconel® 625 due to the solid solution effects of molybdenum and columbium on the nickel-chromium matrix. Inconel® 625 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

Marine, Chemical Processing, and Aerospace.

Nominal Composition

Ni: 58.0 min
Cr: 20.0 - 23.0
Mo: 8.0 - 10.0
Cb (Nb): 3.15 - 4.15
Fe: 5.0 max
Co: 1.0 max
Si: 0.5 max
Mn: 0.5 max
Al: 0.4 max
Ti: 0.4 max
C: 0.10 max

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 300°C)

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

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

Applicable Specifications

Wire & Bar: AMS 5666, AMS 5837, ASTM B446, AWS A5.14, NACE MR0175 (ISO 15156-3).

Typical Mechanical Properties – Spring Applications

  • 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 – 240 ksi; (1380 – 1655 MPa)
    • Suggested Operating Conditions: -300°F to 700°F (-184°C to 370°C‚Äč)


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

For further information Contact:

Email: wireinfo@elgiloy.com
Phone: 1 847 695 1900 
Elgiloy Specialty Metals - Wire Products
356 N.Cross Street
Sycamore, IL 60178 USA