5667

High-Temp Steel

5667

Precipitation-hardening Ni-base, springs & bolts. (AMS; equiv UNS N07750 / AMS 5667). Nominal values—confirm mill certificate.

Chemical Composition (%)

NI70
CR14
NB0.7
TI2.25
AL0.4
FE5

Mechanical Properties

Tensile:≥1170 MPa;Yield:≥790 MPa

Chinese Standard

AMS 5667

Equivalent Standards

AMS 5667

Equivalent Grades

UNS N07750

Applications

沉淀硬化镍基，弹簧螺栓。,"Bar

Available Forms

Strip"

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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