GH4099 (GH99) is a highly alloyed nickel-based aging sheet alloy, which is comprehensively strengthened with cobalt, tungsten, aluminum, titanium and other elements, so that the alloy has high thermal strength, can be used for a long time below 900 °C, and the highest working The temperature can reach 1000ºC.
The alloy is stable in structure and has satisfactory cold and hot forming and welding process performance. It is suitable for the manufacture of high-temperature plate bearing welded structural parts such as aero-engine combustion chambers and afterburners. Large-scale plate structural parts made of this alloy can be It is used directly without aging treatment after solution treatment. The main products are plate and wire, but also plate and forging can be produced.
GH4099(GH99) Heat Treatment System
The plate is air-cooled at 1140~1160ºC; the welding wire is air-cooled at 1100~1140ºC.
GH4099(GH99) Variety Specifications and Status
The cold-rolled sheet with δ0.8~4.0mm and the cold-drawn wire with d0.3~10mm are supplied after solution treatment and alkali pickling.
GH4099(GH99) Melting and Casting Process
The alloy is produced by vacuum induction furnace plus electroslag remelting process.
GH4099(GH99) Application Overview and Special Requirements
The afterburner adjustable nozzle casing of the aero-engine made of this alloy plate has been tested for long-term use and has been put into mass production, which can reduce the weight of the engine and prolong its life.
1.1, material grade
GH4099 (GH99)
1.2. GH4099 (GH99)
Similar grades ЭП693, ХН68МВКТЮР (Russia)
1.3. Technical standard of GH4099 material
GJB 1952-1994 "Specification for cold-rolled sheet of superalloy superalloy for aviation"
BZ 44-903B-06 "Technical Conditions for GH99 Alloy Cold Rolled Sheet" (Fushun Steel Factory Enterprise Standard)
1.4. Chemical composition of GH4099
C Cr Ni W Mo Al Co Ti
≤0.08 17.00~20.0 margin 5.00~7.00 3.50~4.50 1.70~2.40 5.00~8.00 1.00~1.50
Fe B Mg Ce Mn Si P S
≤2.00 ≤0.005 ≤0.010 ≤0.020 ≤0.40 ≤0.50 ≤0.015 ≤0.015
Note: B and Ce are added according to the calculated amount.
GH4099(GH99) Melting temperature range 1345~1390ºC
GH4099(GH99) Density ρ=8.47g/cm3
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