Complaint
The GH4145 alloy is mainly a nickel-based superalloy with γ"[Ni3(Al, Ti, Nb)] phase for aging strengthening.
It has good corrosion resistance and oxidation resistance below 980 ºC, and has high strength below 800 ºC.
It has good relaxation resistance below 540°C, as well as good formability and welding performance.
The alloy is mainly used for the manufacture of flat springs and coil springs that are resistant to relaxation and require high strength for aero-engines that work below 800°C.
It can also be used to manufacture gas turbine turbine blades, etc.
The available varieties are sheet, strip, bar, forging, ring, wire and tube.
Material grade: GH4145 (GH145)
Melting temperature range: 1395~1425ºC
Introduction to alloys
material grade
GH4145 (GH145)
Similar grades
Inconel X-750 (USA), NiCr15Fe7TiAl (Germany), NC15FeTNbA (France), NCF750 (Japan)
technical standards for materials
Q/3B 4088-1994 "GH4145 Alloy Capillary"
Q/3B 4098-1995 "GH4145 Alloy Wire"
Q/3B 4198-1993 "GH4145 Alloy Cold Rolled Sheet and Strip"
Chemical composition
Table 1-1
C Cr Ni+Co Al Ti Fe Nb+Ta
≤0.08 14.0~17.0 ≥70.0 0.40~1.00 2.25~2.75 5.00~9.00 0.70~1.20
Co Mn Si S Cu P
≤1.00 ≤1.00 ≤0.50 ≤0.010 ≤0.50 ≤0.015
Note: Mn and Si in the table are the contents of rods, forgings, rings and wires. Plates, strips and pipes are: Mn≤0.35%, Si≤0.35%.
Physical and chemical properties
Thermal performance
It has good corrosion resistance and oxidation resistance below 980 °C, high strength below 800 °C, good relaxation resistance below 540 °C, and good formability and welding performance.
This alloy is mainly used to manufacture flat springs and coil springs that are resistant to relaxation and require high strength for aero-engines that work below 800 °C.
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