Gh698 / Gh4698 / Nickel-Based Superalloy / Ni-Cr-Based Precipitation Hardening Wrought Superalloy

GH4698 is a nickel-based superalloy reinforced by elements such as aluminum, titanium, molybdenum, and niobium. It is developed by supplementary alloying on the basis of GH4033 alloy.

Basic Information

GH4698 is a nickel-based superalloy reinforced by elements such as aluminum, titanium, molybdenum, and niobium. It is developed by supplementary alloying on the basis of GH4033 alloy. performance. The alloy is widely used in the manufacture of important load-bearing parts such as turbine discs, compressor discs, guide vanes, and load-bearing rings of aero-engines. The working temperature can reach 750ºC~800ºC.

1.1, has the following characteristics

has high lasting strength
Good overall performance
long-term use of tissue stability
Suitable for important load-bearing parts such as aero-engine turbine disks, compressor disks, guide vanes, and load-bearing rings that are suitable for long-term use below 750~800ºC

1.2, application field

Due to its high lasting strength below 500~800ºC, it can be widely used in various high-demanding occasions.
Aero engine
combustion turbine disk
Compressor disc
Guide
bearing ring

1.3. Production specifications

(1) Plate and sheet (please refer to strip for fixed length)
Supply status: hot-rolled sheet, cold-rolled sheet, solution treated or precipitation hardened, pickled

Thickness mm   Cold Rolled/Hot Rolled   width mm   length mm
1.1-                          cold rolled                    1000            2500
1.50-                        cold rolled                    1000            2500
3.00-                  Cold Rolled/Hot Rolled      1000       1500-2000

*Other sizes available on special request **Depending on sheet weight

(2) circular plate or ring
Condition: Hot rolled or forged, solution treated or precipitation hardened, pickled or machined

(3) Bar
Condition: Forged, rolled, cold drawn, solution treated or precipitation hardened, pickled, machined peeled or planed

(4) Forgings
In addition to round plates, rings, rods, and bars, we can also provide forgings with irregular shapes upon request.

(5)) Strip
Condition: Cold rolled annealed, or solution treated, pickled or bright annealed

(6) Wire
Condition: Bright wire drawing, bright annealing Specifications: Diameter Φ0.01-12.0mm (0.0004-1/2 inch), supplied in rolls, packed in barrels or on reels or rolls.

(7) GH4037 (GH37) welding filler material
Weldable rod, wire, strip electrodes and electrode cores are available in all sizes
Editing and broadcasting of similar grades

2.1, similar grades
Зи4698 XH73MTTЮ (Russia)

2.2. Implementation standards
GB/T14992-2005 "Superalloy"
HB 5285-1984 "GH698 Alloy Disc Forgings for Aviation"
GJB 3782-1999 "Specification for forged round cake of superalloy for aviation"

2.3, chemical composition
                      Ni        Cr   Fe     C     Mn    Si     Mo    Al     Ti     Nb      P      Cu     Ce        B        S
minimum   Remain  13.0                                  2.80 1.30  2.35 1.80
maximum  Remain  16.0  2.0  0.08 0.40  0.60 3.20 1.70  2.75 2.20  0.015  0.07  0.020  0.005 0.007

Physical Properties 
3.1. Density ρ=8.32g/cm3

3.2. Melting temperature range 1340~1365ºC

Machining and Heat Treating

4.1. Metallographic structure

After solution treatment, the alloy is composed of γ matrix and MC-type carbides and M5B4-type borides. The microstructure after standard heat treatment consists of a γ matrix and two sizes of spherical γ' phases, MC, M23C6 carbides and M5B4 type borides.

4.2. Process performance and requirements

1. The heat deformation heating temperature of the alloy is 1160~1180ºC, the optimal plastic temperature range is 1160~1000ºC, and the maximum deformation amount at one time is 50%. Large-size die forging requires the use of wrapping die forging.

2. The average grain size of the alloy is closely related to the deformation degree and final forging temperature of the forging.

3. The alloy adopts vacuum induction melting plus vacuum arc remelting or vacuum induction melting plus electroslag remelting process. Similar foreign alloys use non-vacuum furnace melting and vacuum arc remelting process.

  Company Profile

Test Equipment :

Company strength:

Certificate: