Nickel Super Alloy 825 (Wst 2.4858)

Technical Data Sheet

Chemical Composition Limits
Weight % Ni Fe Cr Mo Cu Ti C Mn S Si Al
Alloy 825 38 - 46 22 min 19.5 - 23.5 2.5 - 3.5 1.5 - 3 0.6 - 1.2 0.05 max 1 max 0.03 max 0.5 max 0.2 max

Alloy 825 is a nickel-iron-chromium alloy with additions of molybdenum and copper. It has excellent resistance to both reducing and oxidizing acids, to stress-corrosion cracking, and to localise attack such as pitting and crevice corrosion. The alloy are especially resistant to sulphuric and phosphoric acid. Used for chemical processing, pollution control equipment, oil and gas well piping, nuclear fuel reprocessing, acid production and pickling equipment.

Typical Mechanical Properties

Material Form and Condition Tensile Strength MPa Yield Strength (0.2% Offset) MPa Elongation (%)
Alloy 825 Tube Annealed 772 441 36
Alloy 825 Tube Cold Drawn 1000 889 15
Alloy 825 Bar Annealed 690 324 45
Alloy 825 Plate Annealed 662 338 45
Alloy 825 Sheet Annealed 758 421 39


Alloy 825 is available in Instrument tube, Precision tube and Hydraulic tube. Alloy 825 can also be supplied in Coiled Tube with a seamless and welded execution. Contact Sales for further availability.

At Aircraft Materials all stock items can be shipped out within 24 hours, usually within the same day. Even cutting orders for bar or sheet can be processed and dispatched the same day, and for time-critical situations such as AOGs, we have a dedicated AOG service desk ready to help (

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Every effort is made to ensure that technical specifications are accurate. However, technical specifications included herein should be used as a guideline only. All specifications are subject to change without notice.

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