Gh99 / Age-Strengthened Nickel-Based Superalloy / Gh4099 /

• Application: Industrial
• Standard: GB, ASTM
• Purity: >99.5%
• Alloy: Alloy
• Powder: Not Powder
• Transport Package: Wooden
• Model NO.: XD-124
• Origin: Jiangsu Baoying
• HS Code: 7505120000
• Production Capacity: 500ton/Year

Product Description

GH4099 (GH99) is a highly alloyed nickel-based ageing 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 ºC, and the highest working The temperature can reach 1000ºC.

The alloy is stable in structure and has satisfactory cold and hot forming and welding 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.

Material introduction editing broadcast

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.

2. GH4099 (GH99) physical and chemical properties

2.1, GH4099 (GH99) thermal performance

2.1.1, GH4099 (GH99) melting temperature range 1345~1390ºC

2.1.2. The thermal conductivity of GH4099 (GH99) is shown in Table 2-1.

table 2-1

θ/ºC	100	200	300	400	500	600	700	800	900	1000
λ/(W/(m·C))	10.47	12.56	14.24	15.91	18.00	19.68	21.77	23.45	25.54	27.21

2.1.3. The linear expansion coefficient of GH4099 (GH99) is shown in Table 2-2.

Table 2-2

θ/ºC	20~100	20~200	20~300	20~400	20~500	20~600	20~700	20~800	20~900	20~1000
α/10-6C-1	12.0	12.4	12.8	13.0	13.7	14.2	14.7	15.1	15.3	17.4

2.1.4 Thermal diffusivity see Table 2-3

Table 2-3

θ/ºC	10	100	200	300	400	500	600	700	800	900
Q/(10-6m2/S))	2.5	2.7	3.0	3.3	3.6	3.9	4.0	4.3	4.4	4.55

2.2, GH4099 (GH99) density
ρ=8.47g/cm3

2.3, GH4099 electrical resistivity

Table 2-4

θ/ºC	14	110	200	300	400	500	600	700	800	900	1000
ρ/(10-6Ω.M))	1.373	1.403	1.414	1.427	1.440	1.443	1.457	1.452	1.423	1.393	1.357

2.4, GH4099 (GH99) magnetic energy alloy non-magnetic

2.5, GH4099 chemical properties

2.5.1, GH4099 (GH99) antioxidant properties

2.5.1.1 The oxidation rate and grain boundary oxidation depth of GH4099 (GH99) alloy tested in air medium for 100h are shown in Table 2-6.

θ/ºC	800	900	1000	1010
Oxidation rate/(g/m2·h)	0.017	0.084	0.212	0.481
Grain boundary oxidation depth/mm	0	0.0064~0.0086	0.0160~0.0192	0.0288~0.0320

Process requirements

3.1. Formability

3.1.1. The alloy forging furnace temperature is ≤700ºC, the heating temperature is 1120~1160ºC, the opening forging temperature is not less than 1050ºC, and the final forging temperature is not less than 980ºC. The heating temperature of slab hot rolling is 1110~1150ºC, and the final rolling temperature is not lower than 850ºC. The heating temperature of sheet blank rolling is 1130~1150ºC, and the heating temperature of finishing rolling is 1110~1130ºC.

3.1.2. The ultimate deep-drawing coefficient of the alloy is 2.08, the ultimate tumbling coefficient is 1.64, the minimum radius is less than 0.77δ, and the ultimate thinning rate is 71.7%

3.1.3. When the cold deformation is 30%, the initial recrystallization temperature of the plate is 900ºC, and the complete recrystallization temperature is 1080ºC.

3.2, welding performance

The alloy has satisfactory welding performance, and the cross tower welding crack tendency is less than 15%. It can be combined with manual argon arc welding, automatic tungsten argon arc welding, seam welding and spot welding. Pickling the surface to be soldered with rare resistance. The alloy can be used for argon arc welding and seam welding with GH3030, GH3044, GH3128 and other high temperature alloys.

3.3. Surface heat treatment

3.3.1. Before and after heat treatment of parts, the surface oil and other dirt should be cleaned to avoid local corrosion on the surface during heat treatment.

3.3.2. The oxide skin of the parts after heat treatment can be cleaned by sand blasting or pickling solution containing hydrofluoric acid. Parts must be cleaned with a pickling solution containing hydrofluoric acid prior to resistance welding.

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