GH90

HuaNickel GH90 is a Ni-Cr-Co-based precipitation-hardened deformed superalloy with a service temperature of up to 920°C. The alloy has high tensile strength and creep resistance, good oxidation resistance and corrosion resistance at 815°C~870°C, and high fatigue strength under the repeated action of cold and heat. The alloy has good processing and welding properties. It is suitable for the production of turbine discs, blades, high-temperature fasteners, clamps, sealing rings and elastic components of aviation turbine engines.

GH90 Chemical composition：

	Ni	Cr	Co	AI	Ti	Fe	Zr	B	Si	Mn	S	P	Cu
Min	Bal	18	15	1	2	≤
Max		21	21	2	3	1.5	0.15	0.02	0.8	0.4	0.15	0.02	0.2

GH90 Physical properties：

Density	8.18g/cm³
Melting point	1310~1370℃

Coefficient of linear expansion

θ/℃	α/(10-6℃-¹)	θ/℃	α/(10-6℃-I)
20～100	12.71	20～600	15.03
20～200	13.09	20～700	15.58
20～300	13.51	20～800	16.36
20～400	14.04	20～900	17.38
20～500	14.52	20～1000

Resilient performance

θ/℃	20	100	200	300	400
E/GPa	225	219	213	207	199
G/GPa	83	82	80	77	74
θ/℃	500	600	700	800	900
E/GPa	192	184	175	168
G/GPa	71	68	65	61	57

GH90 Mechanical properties：

Standard number	Breed and specification  / mm		θ/℃	Tensile properties				Hardness HV	Long-lasting performance
				σb/MPa	σp0.2/MPa	δ₅/%	ψ/%		σ/MPa	τ/h
GB/T   14994 WS9-7016	Cold drawer		650	≥820	≥590	≥8
		—	870		——	——	—	—	140	≥30
WS9-7014	For springs Cold draw	≤1.0	20	≥1540			—		——	—
		>1.0～5.0	20	≥1390	≥1160
		>5.0～8.0	20	≥1310	≥1000	≥10			—	—
		Blank	870	——	——	——			140	≥30
WS9-7015.1	For springs Silk	>0.44～0.99	20	≥1080		≥15
		>0.99～8.0	20	≥1080	≥620	≥15
		Blank	870	—					140	≥30
WS9-7015.2	For springs Flat wire	1.65×0.5	20	≥1080	≥620	≥15
		Blank	870		—	——	一	——	140	≥30

GH90 Alloy properties：

GH90 alloy has good oxidation and corrosion resistance below 1040°C, and is prone to intergranular oxidation above 1040°C.

GH90 superalloy has excellent high-temperature strength, can withstand high loads at high temperatures, and is suitable for manufacturing high-temperature components.

GH90 Uses of alloys：

GH90 alloy is used to make high-temperature spring elements, high-temperature fasteners, combustion chamber clamps and stop pins and other parts of aero engines.

H4090 Process performance：

Welding process:HuaNickel  GH90 alloy can be used for inert gas shielded tungsten arc welding and flash butt welding in the solid solution state.

Cutting: GH90 alloy has good machinability in the state of solution treatment, and is processed slowly by using hard tools according to the specified feed amount after aging treatment.

Relevant standards：

GB/T14992、GB/T 14994 、HB/Z140、WS9-7014 GH90(N90)  、WS9-7015.1 GH90(N90)、WS9-7015.2 GH90(N90)、WS9-7016 GH90(N90)、WS9-7086 GH90(N90)、WS9-7087 GH90(N90)