Nistelle™ 625 Alloy

Nominal Composition (Mass %) and Physical Properties

Ni Cr Mo C Nb+Ta Fe Others Hardness Density Melting Range
Base 21.5 9 0.1 max 3.7 5 max Si, Mn, Al, Ti 25 HRC max 8.42 g/cm3
0.304 lb/in3

Nistelle 625

Nistelle nickel-based alloys are designed primarily for high corrosion resistance. They have excellent high-temperature strength, resistance to oxidizing and/or reducing acids (depending on the grade) and are readily machinable.

Nistelle 625 is a nickel-chromium-molybdenum alloy with an addition of niobium that acts with the molybdenum to stiffen the alloy’s matrix, thereby providing high strength without a strengthening heat treatment. The alloy resists a wide range of severely corrosive environments and is especially resistant to pitting and crevice corrosion. It has excellent high-temperature oxidation and corrosion properties. Nistelle 625 is readily manufactured and fabricated by common industrial practices and has excellent weld qualities.

Nistelle 625 has been widely used in a range of high-temperature aerospace, chemical process, and power industry applications. As a low-temperature corrosion-resistant material, it has been used in the chemical industry, marine industry and in pollution-control equipment. It is widely specified for use in seawater and contaminated seawater environments.


Vacuum-Cast Nistelle 625
AWS 5.14
UNS N26625
Powder, Casting
AMS 5401 Casting (Vacuum)
AMS 5402 Casting (Air Melt)


Nistelle 625 Alloy Data Sheet

Check out our Nistelle 625 Alloy data sheet for additional information.

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