A comprehensive introduction to GH4099 (GH99) highly alloyed nickel-based aging plate alloy
1.Material Overview:GH4099 (GH99) is a highly alloyed nickel-based aging plate alloy, which is comprehensively strengthened with cobalt, tungsten, aluminum, titanium and other elements, with high thermal strength, which can be used for a long time below 900, and the maximum working temperature can reach 1000. It is suitable for the manufacture of high-temperature plate bearing welded structural parts such as aero engine combustion chamber and afterburner combustion chamber.
2.Chemical Composition:
c(％)0.08
cr(％)17.00～20.0
ni( ) margin.
w(％)5.00～7.00
mo(％)3.50～4.50
al(％)1.70～2.40
co(％)5.00～8.00
ti(％)1.00～1.50
fe(％)2.0
si(％)0.40
mn(％)0.50
p(％)0.015
s(％)0.015
Other( )b 0005, ce≤0.020
3.Physical Properties:
Density: No specific value is provided.
Melting Point: 1345 1390
4.Heat treatment regime:The plate is 1140 1160 and air-cooled; The welding wire is 1100 1140 and air-cooled.
5.Variety, Specification and Status:** Cold-rolled sheet δ08～4.0mm cold-rolled sheet and d03 10mm cold drawn wire, all solution treatment and alkali pickling**.
6.Melting & Casting Process:The alloy is produced by vacuum induction furnace and electroslag remelting process.
7.Application areas and special requirements:It is used in the manufacture of high-temperature plate bearing welded structural parts for the combustion chamber and afterburner of aero engines. It has passed the long-term use assessment and is widely used in the production of large-scale plate structural parts, which can be used directly after solution treatment.
8.Chemical properties and formability:
Melting temperature range: 1345 1390
Ultimate deep drawing coefficient: 208
Ultimate spinning rate: 717%
9.Welding Performance:It has satisfactory welding process performance, and can be combined with manual argon arc welding, automatic tungsten grade argon arc welding, seam welding and spot welding. TIG and seam welding with other superalloys can be performed.
10.Surface heat treatment:The surface oil and other dirt should be cleaned before and after heat treatment, and the oxide scale after heat treatment can be cleaned with sand blowing or pickling solution containing hydrofluoric acid.
Summary:GH4099 (GH99) has excellent high-temperature performance, formability and welding performance, which is suitable for the manufacture of high-temperature parts of aero engines, and provides reliable material support for improving engine performance and life.