GH169

HuaNickel GH169is a nickel-based superalloy composed of elements such as Ni-Cr-Fe. The alloy has high strength below 650°C, and has good fatigue resistance, radiation resistance, oxidation resistance and corrosion resistance, as well as good processing properties, welding properties and long-term microstructure stability.

GH169Chemical composition：

	Fe	Cr	Ni	Mo	AI	Ti	Nb	C	Co	B	Mg	Mn	Si	P	S	Cu
Min	Bal	17	50	2.8	0.2	0.65	4.75	≤
Max		21	55	3.3	0.8	1.15	5.5	0.08	1	0.006	0.01	0.35	0.35	0.015	0.015	0.3

GH169Physical properties：

Density	8.24g/cm³
Melting point	1260~1320℃
Magnetic properties	not

Thermal conductivity

θ/℃	11	100	200	300	400	500
α/[W/(m·℃)]	13.4	14.7	15.9	17.8	18.3	19.6
θ/℃	600	700	800	900	1000
α/[W/(m·℃)]	21.2	22.8	23.6	27.6	30.4

Specific heat capacity

θ/℃	300	400	500	600
c/[J/(kg·℃)]	481.4	493.9	514.8	539.0
θ/℃	700	800	900	1000
c/[J/(kg·℃)]	573.4	615.3	657.2	707.4

Coefficient of linear expansion

θ/℃	20~-253	20~-183	20~100	20~200	20~300	20~400
α/(10-6℃-1)	9.1	11.0	11.8	13.0	13.5	14.1
0/℃	20~500	20~600	20~700	20~800	20~900	20~1000
α/(10-℃-I)	14.4	14.8	15.4	17.0	18.4	18.7

GH169Mechanical properties：

Standard number

Variety

Sampling

θ/℃

Tensile properties

HBS

Long-lasting performance

σb/MPa

σp0.2/MPa

δ₅/%

ψ/%

σ/MPa

τ/h

δ₅/%

τh/h

GJB 5280

Aviation disc forgings

ChordalStandard heat treatment

20

≥1270

≥1030

≥12

≥15

461～341

—

—

—

650

≥1000

≥865

≥12

≥18

一

690

≥25

≥5

≥t

GJB 5301

Aviation rings

20

≥1270

≥1035

≥12

≥15

451～345

—

—

—

650

≥1000

≥860

≥12

≥15

690

≥25

≥5

≥t

GH169Alloy properties：

GH169alloy can be cooled by helium during vacuum self-consumption remelting, which can effectively reduce niobium segregation.

The injection molding process is used to produce rings, which can reduce production costs and shorten production cycles;

The superplastic forming process expands the production range of the product.

GH169Uses of alloys：

HuaNickel GH169alloy is used to make aero engine turbine discs, rings, casings, shafts, blades, fasteners, elastic elements, gas pipes, sealing elements and welded structural parts, etc.; production of turbine rotors and other components in liquid hydrogen and liquid oxygen rocket engines; fabrication of various elastic elements and lattices for nuclear industrial applications; Manufacture of a wide range of parts for applications in the petroleum and chemical industries.

GH169Process performance：

Welding process: The alloy has satisfactory welding performance, and can be welded by argon arc welding, electron beam welding, seam welding, spot welding and other methods.

For the parts that are directly aged, inertial friction welding can be carried out in the forging state, and then the direct aging treatment can be carried out after welding, so that the welded joints with high lasting strength can be obtained; With the selection of appropriate friction welding process parameters, while retaining the fine grain structure, the weld edge and the heat-affected zone can also retain the strengthening phase γ, γ and δ phases, which has a significant impact on the performance of the joint

Surface treatment: The surface of the part can be strengthened by shot peening, hole extrusion strengthening or thread rolling strengthening, so that the service life of the part under alternating load conditions can be doubled.

Cutting: The alloy can be cut satisfactorily. When machining alloys, it is necessary to ensure that the arc meets the design requirements and that the transition is smooth.

Relevant standards：

GJB 2611、GJB 2612、GJB3318A、GJB 3527、GJB 5280、GJB 5301、GJB712A 、HB/Z140、Q/5B4040、Q/3B4048、Q/3B4056 、Q/3B4054 、Q/3B4050、GH169、Q/5B4037、Q/3B4052 、GH169 、GH4169、GH4169、Q/5B4029、GH4169