Alloy 404

Nickel

Alloy 404 nickel alloy

Alloy 404 supplied by Shanxi Youte Steel (jlhsteel.net).

Chemical Composition (%)

NI	52
CU	41
FE	0.5
SI	0.1
MN	0.1
S	0.024

Chinese Standard

ASTM B127

Equivalent Grades

Monel 404 / UNS N04404

Applications

Aerospace, chemical processing, marine, nuclear, heat resistance.

Available Forms

Bar, Plate, Sheet, Tube, Wire, Forging, Pipe

Uses

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.

Heat Treatment

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

Precautions

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.

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