GH39

HuaNickel GH39is a Ni-Cr-based solution-strengthened deformed superalloy, which is mainly solution strengthened with elements such as chromium and molybdenum. It has good thermal strength, good resistance to cold and heat fatigue and good oxidation resistance. The alloy has good cold forming and welding properties.

GH39Chemical composition：

	Ni	Cr	Mo	AI	Ti	Nb	C	Fe	Mn	Si	P	S	Cu
Min	Bal	19	1.8	0.35	0.35	0.9	≤
Max		22	2.3	0.75	0.75	1.3	0.08	3	0.4	0.8	0.02	0.012	0.2

GH39Physical properties：

Density		8.3g/cm³
Resistivity	20℃	1.18×10-⁶Ω·m
Magnetic properties		not

Coefficient of linear expansion

θ/℃	α/(10-6℃-I)	θ/℃	α/(10-6℃-1)	θ/℃	α/(10-6℃-1)
20～100	11.5	20～500	13.8	20～800	15.3
20～200	12.4	20～600	14.3	20～900	15.8
20～300	13.2	20～700	14.9	20～1000	16.4
20～400	13.5			—

Resilient performance

θ/℃	20	400	500	600	700	800	900
E/GPa	196	162	160	147	134	98	—
Ep/GPa	211	182	176	169	162	155	147

GH39Mechanical properties：

Standard number	variety	heat treatment	Stretch at room temperature			800℃Stretch
			σb/MPa	δ₅/%	ψ/%	σb/MPa	δ₅/%	ψ/%
			≥
GJB 1952A	Cold-rolled plate	(1050～1090)℃/AC	735	40	—	245	40	——
GJB 2297A	Cold-drawn notched tubing	(1050～1080)℃/AC/WQ	6850	40		245	40	——
GJB 3165A	Hot rolled forged rods	(1050～1080)℃/AC/OQ	735	40	—	245	40	40
GJB 3317A	Hot rolled plate	(1050～1090)℃/AC	735	40	45	245	40	50
GJB 3318A	Cold-rolled strip	(1050～1090)℃/AC	7352	40	—		—	—
GB/T 15062	Cold drawing	(1050～1080)℃/WQ	635	35	—	—

GH39Alloy properties：

GH39alloy supply state sheet has good hot working process plasticity and good stamping properties. It can be welded by argon arc welding, spot welding or seam welding, etc., and its welding performance is excellent, and the crack tendency of argon arc welding is small. The welding characteristics are close to that of GH3030 alloy. It can be welded in combination with alloys such as GH1140, HuaNickel GH3030 and GH3044. There is no precipitation of harmful phase in the alloy, the microstructure stability is good, and when working at high temperature for a long time, there is a tendency to oxidize along the grain boundary.

GH39Uses of alloys：

GH39alloy is used to make aero engine combustion chamber and afterburner parts.

GH39Process performance：

Welding process: The alloy can be welded by argon arc welding, spot welding or seam welding, which has excellent welding performance and small crack tendency of argon arc welding.

Plasticity of hot working process: HuaNickel GH39alloy has good plasticity of hot working process and good deformation performance. The heating temperature for forging is 1170°C, and the final forging is 900°C.

Heat treatment: After heat treatment, the oxide scale on the surface of the part can be removed by sand blowing or pickling.

Relevant standards：

GB/T15062、GJB 1952A 、GJB 2297A、GJB 2612 、GJB3165A、GJB3317A  、GJB3318A 、HB/Z140