GH761

HuaNickel GH761 is a Fe-Ni-Cr-based precipitation-hardening deformed superalloy. The alloy is strengthened by adding high alumina, high titanium and controlled Al/Ti. It has excellent high-temperature performance and corrosion resistance. It is mainly composed of nickel, chromium, molybdenum, tungsten and other elements, also known as “super alloy,” with high strength, high toughness, high heat resistance and high corrosion resistance, and is widely used in aviation, aerospace, energy, chemical industry and other fields.

GH761 Chemical composition：

	Fe	C	Cr	Ni	W	Mo	AI	Ti	B	Ce	Mn	Si	P	S	Cu
Min	Bal	0.02	12	42	2.8	1.4	1.4	3.2	≤
Max		0.07	14	45	3.3	1.9	1.85	3.65	0.015	0.03	0.5	0.4	0.02	0.008	0.2

GH761 Physical properties：

Density	8.10g/cm³
Melting point	1325℃~1345℃

Thermal conductivity

θ/℃	300	400	500	600
α/[W/(m·℃)]	13.3	15.2	17.2	19.6
θ/℃	700	800	900	1000
α/[W/(m·℃)]	22.4	25.3	28.7	31.7

Specific heat capacity

θ/℃	300	400	500	600
c/[J/(kg·K)]	419	440	469	507
θ/℃	700	800	900	1000
c/[J/(kg·K)]	553	603	670	745

Resilient performance

θ/℃	13	100	150	200	250	300	350	400	450	500	550	600	650	700	750	800	850	900
Ed/GPa	205	204	202	200	198	195	191	188	183	179	176	172	168	163	159	154	148	133
G/GPa	78.3	77.5	76.8	76.1	75.1	73.9	72.6	71.2	69.6	68.1	66.5	64.8	63.2	61.0	59.5	57.8	56.5	一
μ	0.31	0.315	—	0.315		0.32		0.32	—	0.32	—	0.32	—	0.33	—	0.33	0.33	——

GH761 Mechanical properties：

Standard number	Variety	Heat treatment	θ/℃	Tensile properties				lmpact	Hardness	637MPaLong-lasting performance
				σb/MPa	σpo.2/MPa	δ₅/%	ψ/%	aku/kJ/m²	HBS	τ/h	τH/h
				≥						≥
BTXH 524	Forgings, forging rods	systemⅡ	20	1125	810	9	12	300	415～321	一
			650	930	800	7	10	—		23	T
	Hot rolled rods	systemI	20	1125	835	9	12	300	415～321
			650	930		8	10	一	一	23	T
QJ/DT 0160027	Forgings, rings, forging rods	systemI	20	1125	810	9	12	300	415～321	——	—
			650	930	一	7	10		—	23

GH761 Alloy properties：

GH761 alloy has good resistance to gas corrosion below 900°C and stress corrosion resistance in gas atmosphere. After (650~700)°C×2000h aging, the new phase is not precipitated; A small amount of Laves phase precipitation was precipitated after 750°C × 2000h aging.

GH761 Uses of alloys：

GH761 alloy is used to make aero engine turbine discs, compressor discs, drums, turbine casings, grate rings, rectifier blades, precision bolts and other parts.

GH761 Process performance：

Welding process:HuaNickel  GH761 alloy can be used for argon arc welding and electron beam welding. TIG welding is carried out in a solid solution state, and aging treatment is carried out after welding.

Cutting process: HuaNickel GH761 alloy has good cutting machinability, and can be used for various cutting processes in the standard heat treatment state.

Relevant standards：

HB/Z 140、 BTXH524 、GH761、QJ/DT 0160027 、GH761