GH80A

The HuaNickel GH80A is based on Ni-Cr and the operating temperature is less than 800°C. The alloy is mainly composed of aluminum and titanium elements to form a γ’phase precipitation strengthening phase. The alloy has good creep resistance and oxidation resistance in the range of 650°C~850°C. The cold and hot working properties of the alloy are good.

GH80A Chemical composition：

	Ni	C	Cr	AI	Ti	Fe	B	Si	Mn	S	P	Cu	Pb	Ag
Min	Bal	0.04	18	1	1.8	≤
Max		0.1	21	1.8	2.7	1.5	0.008	0.8	0.4	0.015	0.02	0.2	0.002	0.0005

GH80A Physical properties：

Density		8.15g/cm3
Melting point		1405℃
Resistivity	20℃	1.34×10-⁶Ω·m
Magnetic properties		not

Coefficient of linear expansion

θ/℃	25～100	25～200	25～300	25～400
α/(10~5℃-1)	12.7	13.1	13.7	14.4
θ/℃	25～500	25～600	25～700	25～800
α/(10-6℃-¹)	14.8	15.1	15.5	16.2

Resilient performance

θ/℃	20	100	200	300
E/GPa	222	218	214	206
θ/℃	400	500	600	700
E/GPa	200	194	189	179

GH80A Mechanical properties：

Standard number	Variety	Heat treatment	Room temperature performance
			σb/MPa	σp0.2/MPa	δ₅/%	ψ/%	Akv/J	Hardness
QJ/DT 01.63022	Round rod for diesel engine valve	Standard heat treatment	≥1150	≥800	≥15	≥20		HRC≥36
辽新6-0051	Rods for vehicles and ships	Standard heat treatment	1030～1275	≥640	≥20	≥20	≥21	—
QJ/DT 01.63019	Forged rods and step shafts for air valves	Standard heat treatment	1200～1400	≥800	≥15	≥25	≥35	HB≥320

GH80A Alloy properties：

The GH80A alloy did not precipitate TCP phase after long-term aging at 700°C~850°C for 1000h.

GH80A Uses of alloys：

GH80A alloy is used in the manufacture of rotor blades, guide vane bearings, fan-shaped mounting rings, bolts, blade lock plates and other parts of aero engines. It is also used in the manufacture of fasteners and blades for automobile engines, as well as valves and shafts for trains.

GH80A Process performance：

Heat treatment: The stamping and forming parts of plates and strips need to be annealed in an intermediate vacuum after each forming time, and the system is 1060 °C± 10 °C, 10 min, and the argon fan is cooled. The final heat treatment of the parts is aged in a vacuum furnace at 750°C±10°C for 4h, and cooled by an argon fan. For the local work hardening of the blade in the manufacturing process after solution (before aging), argon or hydrogen protective surface annealing should be carried out according to the specified requirements, and the annealing temperature should be 1070 °C ~ 1090 °C [5].

Cutting: The alloy has good machinability in a fully heat-treated state.

Relevant standards：

HB/Z 140、WS9-7009GH80A 、WS9-7011 GH80A、WS9-7011 GH80A 、WS9-7095 GH80A 、WS9-7156 GH80A 、QJ/DT01.63018 GH80A 、QJ/DT01.63019GH80A 、QJ/DT01.63022、GH80A