Alloy Inconel 625

Alloy Inconel 625

Principal Design Features: This nickel-chromium-molybdenum wrought alloy is an excellent general purpose material for elevated temperature use in high strength, oxidation problem applications. It also has excellent corrosion resistance to many acids and resists intergranular attack and stress-corrosion cracking.

Partial List of Applications: The alloy finds use in high temperature applications such as heat exchangers and gas turbine components. Because of its good corrosion resistance it is also used in wet scrubbers and some acid process equipment.

Machinability: May be machined by conventional means. However, the alloy tends to work harden ahead of cutting and rigid tooling is essential to avoid chatter and work hardening in front of the tool edge.

Forming: This alloy can be cold formed by conventional means and tooling. The alloy does work harden during cold working with an attendant increase in strength. This increase in strength may be of value for moderate temperature applications and, in these instances, the formed parts can be left in the cold work hardened condition.

Welding: Welding is readily accomplished using matching alloy filler metal for the conventional welding techniques.

Alloy Inconel 625 Chemistry

Aluminum0.4 max
Carbon0.1 max
Chromium20 - 23
Cobalt1 max
Iron5 max
Manganese0.5 max
Molybdenum8 - 10
NickelBalance
Niobium3.15 - 4.15
Phosphorus0.015 max
Silicon
0.5 max
Sulphur0.015 max
Titanium0.4 max

Alloy Inconel 625 Physical Data

Density (lb / cu. in.)0.305
Specific Heat (Btu/lb/Deg F - [32-212 Deg F])0.107
Melting Point (Deg F)2425
Poissons Ratio0.312
Thermal Conductivity74
Mean Coeff Thermal Expansion7.3
Modulus of Elasticity Tension29.2
Reduction of Area70

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