NeoNickel

Alloy 625

A nickel-chromium-molybdenum-niobium grade, Alloy 625, commonly referred to as Inconel® 625, offers outstanding corrosion resistance and superb weldability.

Characteristics of Alloy 625

The addition of niobium provides high strength without the need for heat treatment. NeoNickel also offers Alloy 625 sheet with a combination of low-cycle fatigue and deep drawing quality.

  • UNS Number: N06625
  • Werkstoff Number: 2.4856
  • ASTM: B443, B444, B446, B704, B705, B366, B751, B775, B829
  • AMS: 5599, 5666, 5837, 5879, 5869, 5581, 5666

Product availability

Coil
Coiled Weld Wire
Flanges
Pipe (Seamless)
Pipe Fittings
Plate
Round Bar
Round Tube
Sheet
Welding Wire

Chemical analysis

%CrNiMoCoNb+TaAlTiCFeMnSiPS
Min20-8-3.15--------
Max23Balance1014.150.40.40.15.00.50.50.0150.015

Key Properties

  • Density: 8.442 g/cm³
  • Melting Point: 1287-1348°C

About Alloy 625

Alloy 625, commonly referred to as Inconel® 625, demonstrates an excellent combination of corrosion resistance and high strength. Due to the high nickel content, Inconel® Alloy 625 is immune to chloride-induced stress corrosion cracking. It also has good resistance to pitting and crevice corrosion.

NeoNickel offers Alloy 625 sheet certified to both UNS N06625, 625 LCF® and ATI 625 HP® (UNS N06626). The 625 sheet meets the low-cycle fatigue properties specified in UNS N06626 and is also produced and certified as DDQ (deep drawing quality).

Resulting from the alloy’s excellent thermal stability, Alloy 625/Inconel® 625 is the alloy of choice for weld overlay applications in the oil and gas/petrochemical and refineries markets.
To learn more about Alloy 625 contact us, or fill in our online quote form and we’ll get right back to you!

ATI 625 HP® is a registered trademark of ATI Allegheny.
625 LCF® is a registered trademark of Special Metals Corporation.

Mechanical & Physical Properties

Mechanical & Physical Properties21°C204 °C316 °C427 °C538 °C649 °C760 °C871 °C
Ultimate Tensile Strength /Mpa992.9923.9910.1910.1896.3820.5537.8275.8
0.2% Yield Strength /MPa579.2455.1434.4420.6420.6413.7406.8268.9
Elongation %444542.545483459117
Coefficient of Thermal Expansion µm/m⁰C-13.113.313.71414.815.315.8
Thermal Conductivity /kcal/(hr.m.°C)8.510.712.213.51516.417.919.6
Modulus of Elasticity/ MPa2.071.931.931.861.791.651.59-

Typical Rupture Strength, Bar

Temperature, °C649°C704°C760°C
100 Hours, ksi593418
1,000 Hours, ksi432312

Applications of Alloy 625

  • Aircraft ducting and exhaust systems
  • Engine thrust-reverser systems
  • Turbine shroud rings
  • Bellows, expansion joints
  • Gaskets and damper seals
  • Motorsport exhaust and clamps
  • Weld overlay and spacers for heat recovery systems
  • Furnace muffles
  • Valve seats and components
Proud members of the British Valve & Actuator AssociationProud members of the British Valve & Actuator Association