825 Alloy
UNS N08825
Trade Name: INCOLOY® Alloy 825

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 localized attack such as pitting and crevice corrosion. The alloy is especially resistant to sulfuric and phosphoric acids. Used for chemical processing, pollution-control equipment, oil and gas well piping, nuclear fuel reprocessing, acid production, and pickling equipment. Standard product forms are round, flats, forging stock, pipe, tube, plate, sheet, strip, and wire. (Information provided by Special Metals Corporation)

ASME Boiler and Pressure Vessel Specifications
Sheet/ Plate Forgings Weld Fittings Rod and Bar Tubing - Welded/ Smls Pipe - Welded/ Smls Bolting- Bolts/ Nuts Filler Metals
SB424 NA SB366 SB425 SB704/ SB427-SB163 SB705/   SB423 SB425-825/ SB425-825 ERNiFeCr-1

ASME Boiler and Pressure Vessel Chemical Requirements for Sheet/Plate
Note: all percentages max unless otherwise specified
Ni Cr FeA Mn C Cu Si S Al Ti Mo
38.0-46.0 19.5-23.5 22.0 (min) 1.0 0.05 1.5-3.0 0.5 0.03 0.2 0.6-1.2 2.5-3.5

ASME Boiler and Pressure Vessel Mechanical Properties for Sheet/Plate
Tensile Strength, Min ksi Yield Strength, (0.2% offset), Min, ksi Min. Elongation in 2", % Density lb/in³
85 35 30.0 0.294

A - Element shall be determined arithmetically by difference
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