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Inconel is the brand name for a group of 20 austenitic nickel-chromium alloys, made by Special Metals Corporation. Each Inconel alloy has been developed with its own specific properties. Here are a few of the most commonly used Inconel alloys:

Inconel 600 – Nickel-chromium alloy with applications in food processing resistant to corrosion by chloride ions and water.

Inconel 625 – Developed for easier welding.

Inconel 690 – Low cobalt content making it ideal for nuclear applications

Inconel 718 – Comprised of nickel, chromium and traces of molybdenum, iron, niobium, aluminium and titanium, this alloy is strong, flexible and can perform well in temperatures of up to 1,300 degrees Fahrenheit.


All Inconel alloys are resistant to oxidation, however, it is in high temperature environments where Inconel outperforms aluminium and steel. This is because, when it is heated, Inconel forms a passivating oxide layer that protects the surface. Different types of Inconel differ in terms of resistance to corrosion, malleability, elasticity and how they react to


It’s during the production process that Inconel alloys take on their temperature resistance. Depending on the alloy, either solid solution strengthening or precipitation strengthening is used. However, due to rapid work hardening, Incomel can be difficult to shape or machine, requiring a slow cut with a hard tool. Inconel parts can be roll threaded using induction heat. Because of its superior temperature resistance, gas tungsten arc welding and electron beam welding are recommended.


Typically, Inconel alloys are used in extreme temperature environments, such as in the chemical industry. However, it is also found in:

  • Food processing
  • Gas turbine blades
  • Nuclear industry
  • Electronics
  • Power generation
  • Aerospace

Interesting Fact

Inconel was first developed in the 1940s by an English company called Wiggin Alloys that was working on an alloy to handle the high temperatures created by the Whittle jet engine.

Chemical Composition of Inconel 625

Element Content
Ni 58 %
Mo 8 – 10%
Cr 20 – 23%
Nb+Ta 3.15 – 4.15%
Fe 5% max

Typical Properties of Inconel 625

Properties Metric Imperial
Density 8.44 g/cm3 0.305 lb/in3
Melting point 1350 °C 2460 °F
Co-Efficient of Expansion 12.8 μm/m.°C
7.1×10-6 in/in.°F
Modulus of Rigidity 79 kN/mm2 11458 ksi
Modulus of Elasticity 205.8 kN/mm2 29849 ksi


Recent Ads in Inconel



Inconel 600

Material Grade: Inconel alloy 600
Offcut Length: 1500mm
Offcut width: 1500mm
Thickness: 2.0mm
Cut Type: Flat