GH44

HuaNickel GH44 is a Ni-Cr-based solution-strengthened deformed superalloy with a service temperature of less than 900°C. The alloy contains a large amount of tungsten and a small amount of aluminum and titanium. And it has excellent oxidation resistance and good stamping and welding process performance. It is suitable for the production of aero engine main combustion chamber and afterburner parts that work for a long time below 900 °C, as well as heat shields, guide vanes, etc.

GH44 Chemical composition：

	Ni	Cr	W	Ti	C	Mo	AI	Fe	Mn	Si	P	S	Cu
Min	Bal	23.5	13	0.3	≤
Max		26.5	16	0.7	0.1	1.5	0.5	4	0.5	0.8	0.013	0.013	0.07

GH44 Physical properties：

Density	8.89g/cm³
Melting point	1352℃~1375℃
Magnetic properties	not

Coefficient of linear expansion

θ/℃	α/(10-6℃-1)	θ/℃	α/(10-5℃-l)	θ/℃	α/(10-6℃-1)
20～100	12.25	20～500	13.31	20～800	14.90
20～200	12.35	20～600	13.50	20～900	15.60
20～300	12.85	20～700	14.30	20～1000	16.28
20～400	13.10	—	—	—

Resilient performance

θ/℃	20	100	200	300	400	500	600	700	800	900	1000
E/GPa	203		——		178	—	—	157	128	100	—
Ed/GPa	203	—	——		173	—		136	126	——	——
Ed/GPa	210	206	200	196	189	183	177	170	161	153	142

GH44 Mechanical properties：

Standard number	variety	heat treatment	Stretch atroomtemperature			900℃Stretch			850℃lasting
			σb/MPa	δ₅/%	ψ/%				σ/MPa	τ/h	δ₅/%
			≥							≥
GJB 1952A	Cold-rolled plate	(1120～1160)℃/AC	735	40	—	195	30	—	—	—
GJB 3020A	Ring blanks	(1120～1160)℃/AC	705	40		195	30	—	80	Measured
GJB 3165A	Hot rolled, forged rods	(1120～1160)℃/AC	685	40	45	195	30	40	70	23	—
GIB 3317A	Hot rolled plate	(1120～1160)℃/AC	735	40		185	30
GJB 3318A	Cold-rolled strip	(1120～1160)℃/AC	735	40	—		—	—	—	—
GJB 5301A	Rings	(1120～1160)℃/AC/OQ	705	40		195	30		80	Measured

GH44 Alloy properties：

HuaNickel GH44 alloy can be welded by argon arc welding, spot welding, seam welding and brazing, and can be welded in combination with 1Cr18Ni9Ti, GH1140, GH3030 and GH3039 alloys. Parts that work at high temperatures can be effectively protected with a W-2 enamel coating.

GH44 Uses of alloys：

HuaNickel GH44 alloy has been used to make plate stamping and welding structural parts of aero engine combustion chamber and afterburner, as well as parts such as mounting edges, conduits and guide vanes, and its performance is reliable and good use.

GH44 Process performance：

Welding process: HuaNickel GH44 alloy can be welded by argon arc welding, spot welding, seam welding and brazing. The fluidity of the weld pool is poor in TIG welding, but the crack tendency is small. During contact welding, it is easy to form bond line extension and shrinkage porosity in the core, so it is generally advisable to use a larger electrode pressure and a lower welding speed.

Relevant standards：

GJB1952A、GJB 3020A、GJB3165A 、GJB 3317A、GJB 3318A 、GJB 5301A、HB/Z140