Inconel 625 is a nickel-chromium-molybdenum alloy with an addition of niobium that acts with the molybdenum to stiffen the alloy's matrix and thereby provide high strength without a strengthening heat treatment. Inconel 625 resists a wide range of severely corrosive environments and is especially resistant to pitting and crevice corrosion. Inconel 625 is used in chemical processing, aerospace and marine engineering, pollution-control equipment and nuclear reactors. Standard product forms are round, flats, forging stock, extruded section, pipe, tube, plate, sheet, strip and wire.
Unit of Measure



N/A Inconel®


N/A Plates


N/A 1 3/4 inches


N/A 1.750 inches44.45 mm

Plate Weight per Unit Area

N/A 0.549 lbs/in²385.9852104 kg/m²

Nickel Alloy Compositions


N/A Inconel® 625

Basic Composition

N/A 1.0% Iron 16.3% Molybdenum 20.5% Chrominum 3.8% Tungsten 58.0% Nickel


N/A 0.315 lbs/in³8.72 g/cm³

ASTM Specification

N/A ASME SB-443 ASTM B-443 SAE 5599 SAE 5869 UNS N06625

Typical Mechanical Properties

Melting Temperature Range

N/A 2350 to 2460 ºF1290 to 1350 ºC

Rupture Strength (1000 h at 1200°F/650°C)

N/A 52000 psi360 MPa

Rupture Strength (1000 h at 1400°F/760°C)

N/A 23000 psi160 MPa

Rupture Strength (1000 h at 1600°F/870°C)

N/A 7200 psi50 MPa

Rupture Strength (1000 h at 1800°F/980°C)

N/A 2600 psi18 MPa