GH4099
High-Temp SteelGH4099
GH4099 Ni-base age-hardening superalloy, Co/W bearing. (GB/T 14992; equiv GB GH4099 / ЭП693). Nominal values—confirm mill certificate.
Chemical Composition (%)
| CR | 17 |
|---|---|
| CO | 5 |
| W | 5 |
| MO | 3.5 |
Mechanical Properties
Tensile:≥690 MPa;Yield:≥280 MPa;Elong:≥25%
Chinese Standard
T 14992 GH4099
Equivalent Standards
GB GH4099 / ЭП693
Available Forms
Bar,Strip
Uses
Nickel/cobalt-base superalloy retaining high strength, creep and corrosion resistance at extreme temperature. Cobalt (≈6.5%) raises hot corrosion and wear resistance. 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.
Comments 0