Nickel Alloys

Alloy 625


A nickel-chromium-molybdenum alloy with the addition of niobium for strengthening. This alloy resists many severely corrosive environments and is very resistant to pitting/crevice corrosion.

Alloy 625 has excellent weldability and service temperatures range from cryogenic to 1800 deg F. The alloy resists scaling at high temperatures making it suitable for heat shields and furnace hardware, also used in offshore marine and aerospace industries among others and for structures in contact with seawater and subject to high mechanical stresses.

Typical applications: Superphosphoric acid production equipment, flue gas scrubbers components, sour gas equipment, offshore and marine equipment.

Available in dia bar stock from ¾" to 10"

(Other forms available on request.)

Colour Code

Related Specifications

Steel Number UNS ASTM
2.4856 N06625 B4433-6

Typical Chemical Analysis

Ni Cr Mo Fe C Mn Si Al TiiNb P S
Bal 57min 20-23 8-10 5 .05 .40 .50 .40 .40 3.2-4.0 .02 .01

For further technical information or additional sizes on this product or any other product or service please contact us.


All data provided is for information and guidance only. Information above is not for design purposes and comes without warranty or guarantee with respect to the subject matter or fitness for purpose.