GH128

HuaNickel GH128 is a Ni-Cr solution-strengthened deformed superalloy with a service temperature of less than 950°C. The alloy has high plasticity, high durability and creep strength, as well as good oxidation resistance, process performance such as stamping and welding, and its comprehensive performance is better than that of similar nickel-based solution strengthened alloys such as GH3044 and GH3536.

GH128 Chemical composition：

	Ni	Cr	W	Mo	AI	Ti	C	Fe	Zr	B	Ce	Si	P	S	Mn
Min	Bal	19	7.5	7.5	0.4	0.4	≤
Max		22	9	9	0.8	0.8	0.05	2	0.06	0.005	0.05	0.8	0.013	0.013	0.5

GH128 Physical properties：

Density	8.81g/cm3
Melting point	1340℃~1390℃
Magnetic properties	not

Coefficient of linear expansion

θ/℃	20～100	20～200	20～300	20～400	20～500
α/(10-6℃-1)	11.25	11.86	12.68	12.80	13.37
θ/℃	20～600	20～700	20～800	20～900	20～1000
α/(10-6℃-1)	13.68	14.46	15.19	15.66	16.29

Resilient performance

θ/℃	20	100	200	300	400	500
Ed/GPa	208	205	202	198	191	189
θ/℃	600	700	800	900	1000
Ed/GPa	187	175	162	152	144

GH128 Mechanical properties：

Standard number	variety	Heat treatment	θ/℃	Tensile properties			Long-lasting performance
				σb/MPa	δ₅/%	ψ/%	Constituencies	Plate thickness/mm	σ/MPa	τ/h	δ₅/%
GJB 1952A	Cold-rolled sheet	Delivery status	20	≥735	≥40.0		—	—	—
		Delivery status  +1200℃/AC	950	≥175	≥40.0		I	>1.2	54	≥23	Measured
								≤1.2		≥20
							Ⅱ	≥1.5	39	≥100	Measured
								<1.5～1.0		≥80
								≤1.0		≥70
GJB 3317A GB/T 14995 GB/T 14996	Hot-rolled plates, cold-rolled plates	Delivery status	20	≥735	≥40.0	Measured	—	—		—	—
		Delivery status  +1200℃/AC	950	≥175	≥40.0	Measured
QJ/D 01.73092	Medium and heavy plates	Delivery status  +1200℃/AC	20	≥735	≥40	Measured	——		—	—	——
			950	≥177	≥40	≥40	—	15～65	100	Measured	——

GH128 Alloy properties：

When working at high temperatures, the parts can be effectively protected with a W-2 enamel layer.

After long-term aging, the alloy has μ phase precipitation.

GH128 Uses of alloys：

HuaNickel GH128 alloy has been used in the manufacture of aero engine flame cylinders, diffusers, afterburners, tail nozzles, adjusting sheets, stabilizers, diffusers and gas pipes, etc., and is in good batch production and use. It is also used in temperature measurement thermocouple protection tubes, fluxgates, magnetometer probes, skeleton materials, W and Mo reduction sintering boats, railway locomotive pre-combustion chamber nozzles and other structural parts under high temperature oxidation atmosphere.

GH128 Process performance：

Welding process: The plate can be welded by argon arc welding, seam welding, and spot welding, and the quality of the welded joint can be satisfied, and the joint strength coefficient is greater than 90%.

Relevant standards：

GB/T14992、GB/T  14995、GB/T14996 、GJB 1952A 、GJB 2612、GJB 3317A、HB/Z140 、辽新7-0062、辽新7-0087、辽新7-0090 、QJ/DT01.73092、QJ/DT01.73131