Monel400

High-Temp Steel

Monel400

Ni-Cu alloy, seawater corrosion resistant. (UNS N04400; equiv Monel 400 / UNS N04400). Nominal values—confirm mill certificate.

Chemical Composition (%)

NI63
CU28
FE2.5
MN2
C0.3
SI0.5

Mechanical Properties

Tensile(annealed):≥480 MPa;Yield(annealed):≥170 MPa;Elong:≥35%;Hardness:≤140 HB

Equivalent Grades

Machining is difficult — use ceramic/PCBN tools, generous coolant and rigid setups. Keep clean (vacuum/inert melting) to avoid inclusions; avoid contamination by low-melting elements.

Applications

镍铜耐海水腐蚀。,"Bar

Available Forms

Plate

Uses

Tube"

Heat Treatment

Nickel/cobalt-base superalloy retaining high strength, creep and corrosion resistance at extreme temperature. Used in gas-turbine blades, aero-engine hot sections, combustors and advanced energy systems.

Precautions

Solution treated 1050–1250 °C and aged (≈700–900 °C) to precipitate γ′/γ″ strengtheners; processed via vacuum induction + VAR/ESR for cleanliness.

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