GH625

HuaNickel GH625 is a Ni-Cr-based solution-strengthened deformed superalloy with chromium, molybdenum and niobium as the main solution-strengthened elements. The alloy has good tensile strength and fatigue resistance from low temperature to 980°C, and the processing and welding process performance is good. GH625 alloy has excellent corrosion and oxidation resistance. It is widely used in the manufacture of aero engine parts, aerospace structural components and chemical equipment.

GH625 Chemical composition：

	Ni	Cr	Mo	Nb	C	Co	AI	Ti	Fe	Si	Mn	S	P	Cu
Min	Bal	20	8	3.15
Max		23	10	4.15	0.1	1	0.4	0.4	5	0.5	0.5	0.015	0.015	0.07

GH625 Physical properties：

Density	8.44g/cm3
Melting point	1290℃~1350℃
Magnetic properties	not

GH625 Mechanical properties：

Standard number	variety	heat treatment	Room temperature performance					815℃Long-lasting performance
			σb/MPa	σp0.2/MPa	δ₅/%	ψ/%	hardness	σ/MPa	τ/h	δ₅/%
			≥				≤		≥
GJB 3165A 辽新7-0023	Hot rolled, forged rods	(950～1030)℃/AC / W Q	830	410	30	Measured	HB290	114	23	15
GJB 3317A	Hot rolled plate	(950～1030)℃/AC	830	410	30	Measured	HV305	114	23	15
辽新7-0038	Cold-rolled sheet	(950～1030)℃/(1090～1200)℃/AC	830	410	30	——	HV305	114	23	15
Q/3B 4080	Pipe	(960～1030)℃/AC / W Q	825	415	35		HRC25	—

GH625 Alloy properties：

HuaNickel GH625 alloy is not in the marine atmosphere or in the non-marine atmosphere, the corrosion rate is very small, and the seawater corrosion resistance is very good. The alloy is resistant to the corrosion of various salt solutions, and has good resistance to nitric acid and phosphoric acid corrosion. It is also quite resistant to hydrochloric acid heated below the boiling point and sulfuric acid at low concentrations. The alloy has a certain aging hardening phenomenon after long-term use at 550°C~700°C, which can lead to some decline in alloy plasticity.

GH625 Uses of alloys：

It is widely used in the manufacture of aero engine parts, aerospace structural components and chemical equipment.

GH625 Process performance：

Welding process: GH625 alloy can be used for argon arc welding with tungsten electrode or this alloy as an additive under a protective atmosphere, and can also be brazed and welded.

Heat treatment of parts: HuaNickel GH625 When the alloy is working at no higher than 650°C, the material in hot-rolled, cold-rolled or annealed state can be used according to requirements. When the working temperature is above 650°C, the annealing process can be used for parts that require good fatigue resistance and tensile strength, and solution treatment can be used for parts that require good creep and durability.

Relevant standards：

GJB 3165A、GJB 3317A、HB/Z140、GH625 、GH625 、Q/3B4080、GH625