Alloy 625

Nickel

Alloy 625 nickel alloy

Alloy 625 supplied by Shanxi Youte Steel (jlhsteel.net).

Chemical Composition (%)

NI	58
CR	20
MO	8
NB	3.15
FE	5

Chinese Standard

ASTM B443

Equivalent Grades

Inconel 625 / UNS N06625 / 2.4856

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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