Inconel 625
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Chemical Data, Mechanical Properties and Specifications for Nickel Alloy 625

Inconel® 625 is a nickel-chromium-molybdenum alloy with niobium added to provide high strength without the need to further harden. Because of this high strength, Alloy 625 can be used to cut thickness and weight from tubing and other forms, thereby improving the transfer of heat.

This alloy is extremely corrosive resistant in severe environments. This allows for use in chemical processing, aerospace and marine engineering, and in nuclear reactors.

We supply Inconel® 625 in a variety of forms, including: Rod, Plate, Sheet, and Tube.

Chemical

Chemical Range
Element Minimum Maximum
Aluminum (Al) -- 0.40
Carbon (C) -- 0.10
Chromium (Cr) 20 23
Cobalt (Co) -- 1.0
Copper (Cu) -- 0.5
Iron (Fe) --
5.0
Manganese (Mn) -- 0.5
Molybdenum (Mo) 8.0 10.0
Nickel (Ni) 58.0
Balance
Niobium (Nb) 3.15 4.15
Phosphorus (P) -- 0.015
Silicon (Si) -- 0.5
Sulphur (S) -- 0.015
Titanium (Ti) -- 0.40

Mechanical

Typical Mechanical Properties for Nickel Alloy 625
Form Tensile Strength Yield Strength Elongation at Break
Annealed Bar 144 ksi 84 ksi 44%

Physical

Typical Physical Data
Density 0.305 lb /in 
Melting Range  2350-2460 ºF 
Specific Heat
0.098 (Btu/lb · ºF)
Curie Temperature < -320  ºF
Permiability
1.0006  (at 200 oerstad (15.9 kA/m)
Coefficient of Expansion 7.1 (70-200 ºF , 10-6  in/in · ºF)
Thermal Conductivity 68 (Btu · in/ft2 · h · ºF)
Electrical Resistivity 776 (ohm·circ mil/ft)

Specs

Applicable Specifications
Rod & Bar ASTM B446, AMS 5666, AMS 5837
Sheet & Plate ASTM B443, AMS 5599, AMS 5869
Tube & Pipe
ASTM B444, ASTM B751, ASTM B829, ASTM B775, ASTM B705, ASTM B704, AMS 5581
Forgings ASTM B564, AMS 5666

Inconel is a registered trademark of Special Metals