Incoloy 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 localized attack, such as pitting and crevice corrosion. Incoloy 825 is especially resistant to sulfuric and phosphoric acids. Incoloy 825 is 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.
Unit of Measure



N/A Incoloy®


N/A Plates


N/A 9/16 inches


N/A 0.5625 inches14.27 mm

Plate Weight per Unit Area

N/A 0.16870 lbs/in²118.6078415 kg/m²

Nickel Alloy Compositions


N/A Incoloy 825

Basic Composition

N/A 1.0% Titanium 2.0% Copper 21.5% Chrominum 28.0% Iron 3.0% Molybdenum 44.0% Nickel


N/A 0.294 lbs/in³8.14 g/cm³

ASTM Specification

N/A ASME SB-424 ASTM B424 UNS N08825

Typical Mechanical Properties

Tensile Strength

N/A 100000 psi690 MPa

Yield Strength (0.2% Offset)

N/A 45000 psi310 MPa


N/A 45 %

Melting Temperature Range

N/A 2500 to 2550 ºF1370 to 1400 ºC