GH4080A (original GH80A) is a superalloy with nickel-chromium as the matrix, and aluminum and titanium are added to form a γ' phase dispersion-strengthened superalloy. Except for the slightly higher aluminum content, the others are similar to GH4033. It has good creep resistance and oxidation resistance between ºC.
Material number: GH4080A
Standard: GB/T14992-2005 UNS AISI ASTM DIIN
GH4080A grades: GH80A, Nimonic 80A, UNS N07080
GH4080A executive standard:
GB/T14992 HB/Z140 QJ/DT01
WS9-7009 WS9-7011 WS9-7095 WS9-7156
Characteristics and application: GH4080A corrosion-resistant alloy,
Chemical composition of GH4080A:
C Cr Ni Al Ti
0.04~0.10 18.0~21.0 Remain 1.00~1.80 1.8~2.7
Co Fe B Mn Si P S Ag Bi Cu Pb
no greater than
2.0 1.50 0.008 0.40 0.80 0.020 0.015 0.0005 0.0001 0.20 0.002
Note: B is added according to the calculated amount, and trace amounts of Ce, Zr and Mg are allowed to be added.
GH80A heat treatment system The bar for blades is: 1080ºC±10ºC, 8h, air cooling+700ºC±5ºC, 16h, air cooling. Hot-rolled, forged and cold-drawn bars: according to the provisions of Table 1-2. Rolled rings: (1050~1080ºC)±10ºC, no more than 2h, water cooling +750ºC±5ºC (or +700ºC±5ºC), 4h (or 16h), air cooling. Hot-rolled sheet, cold-rolled sheet and strip are: supply state +750ºC±10ºC, 4h, air cooling.
material type Solution treatment system statute of limitations
Hot rolled (or forged) bars for hot working 1080ºC±10ºC, 8h, air cooling 700ºC±5ºC, 16h, air cooling or 750ºC±5ºC, 4h, air cooling
Hot rolling for hot working (or forged) bar According to system or
1080ºC±10ºC, holding time according to table 1-3, oil cooling or water cooling or air cooling. (normal condition, d≥40mm, oil cooling)
1080ºC±10ºC, holding time according to table 1-3, air cooling +1080ºC±10ºC, heat preservation for 30min, water cooling
cold drawn bar 1080ºC±10ºC, holding time according to table 1-4, water cooling or air cooling. 1.6 GH80A varieties, specifications and supply status Supply hot-rolled bars for blades with a diameter of d20-55mm, hot-rolled or
Forged bar. Cold-drawn rods supply round rods with a diameter of 8-45mm and hexagonal rods with an inscribed circle diameter of d8-36mm. We supply rolled pieces with an outer diameter of 1000mm, an inner diameter of 900mm and a height of 130mm. We supply hot-rolled sheet with thickness not greater than 9.5mm, cold-rolled sheet with thickness not greater than 4.0mm, and cold-rolled strip with thickness not greater than 0.8mm. Hot-rolled bars for blades are supplied without heat treatment, and their surfaces should be completely ground or polished. Hot-rolled bars for machining are solution-treated and supplied in a descaled state. Cold-drawn bars for upsetting are supplied in a cold-drawn and polished state, cold-drawn bars for machining are supplied in a cold-drawn, solution-treated and descaled state, and hot-working bars are supplied in a manufactured state and descaled (For the bar used in the forging plant, it should be supplied after polishing, and its surface roughness should not be less than 3.2μm). Rolled rings are supplied in solution treated and roughed condition. Hot-rolled sheet, cold-rolled sheet and strip are supplied after softening, alkaline pickling, trimming and leveling or straightening.
1.7 GH80A Melting and Casting Process The bar and plate for blade use vacuum induction melting and electroslag remelting process. Rolled Rings and Hot Rolled, Forged
Induction melting and electroslag remelting, or vacuum induction melting and vacuum arc remelting, or vacuum induction melting and electroslag remelting are used for making and cold drawing bars.
GH4080A physical properties
Density: 8.15 g/cm3
Melting point: 1405 ºC
Magnetic properties: none
This alloy has the following properties:
Main features: The operating temperature is 700-800ºC, and it has good creep resistance and oxidation resistance at 650-850ºC. Precipitation hardenable alloy with excellent high temperature (up to 815°C) tensile properties.
Application example: The alloy has good cold and hot working properties, and is used to manufacture engine rotor blades, guide vane supports, bolts, blade lock plates and other parts
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