Monel® 400 is a nickel-copper alloy with high strength and excellent corrosion resistance in a range of media including sea water, hydrofluoric acid, sulfuric acid and alkalies.

Monel® 400 is used for marine engineering, chemical and hydrocarbon processing equipment, valves, pumps, shafts, fittings, fasteners and heat exchangers. Standard product forms are round, hexagon, flats, forging stock, pipe, tube, plate, sheet, strip and wire.
Unit of Measure



N/A Tubes Tubing


N/A 1 inches25.40 mm


N/A Monel®


N/A 0.028 inches0.7112 mm

Nickel Alloy Compositions


N/A Monel® 400

Basic Composition

N/A 1.1% Manganese 1.6% Iron 32.0% Copper 65.1% Nickel


N/A 0.319 lbs/in³8.84 g/cm³

ASTM Specification

N/A ASME SB-163(s) ASME SB-165(s) ASTM B163(s) ASTM B165(s) ASTM B725(w) ASTM B730(w) SAE 4574(b) SAE 4574(s) UNS N04400

Typical Mechanical Properties

Tensile Strength

N/A 80000 psi550 MPa

Yield Strength (0.2% Offset)

N/A 35000 psi240 MPa

Melting Temperature Range

N/A 2370 to 2460 ºF1300 to 1350 ºC