GH131

Hua Nickel GH131 is a Fe-Ni-Cr based solution-strengthened deformed superalloy, which is solution strengthened by adding chromium, tungsten, molybdenum and other elements, and the service temperature is 700°C~1000°C. The alloy has good hot-working plasticity, welding, and cold formingProcess performance。

GH131 Chemical composition：

	Fe	Cr	Ni	W	Mo	Nb	N	C	Mn	Si	P	S
Min	Bal	19	25	4.8	2.8	0.7	0.15	≤
Max		22	30	6	3.5	1.3	0.3	0.1	1.2	0.8	0.02	0.02

GH131 Physical properties：

Thermal conductivity

θ/℃	20	100	200	300	400	500	600	700	800	900
α/[W/(m·℃)]	9.6	10.5	12.1	13.8	16.3	18.0	19.3	20.9	22.6	24.7

Resilient performance

θ/℃	20	100	300	400	500	600	700
Ed/GPa	220	201	188	181	177	174	177
θ/℃	800	850	900	950	1000	1050	—
Ed/GPa	176	174	173	168	166	164

Coefficient of linear expansion

θ/℃	α/(10-6℃-1)	θ/℃	α/(10-6℃-1)	θ/℃	α/(10-6℃-1)	θ/℃	α/(10-6℃-1)
20～100	14.72	20～600	16.20	20～1100	18.70	500～600	18.5
20～200	14.13	20～70C	16.97	100～200	16.0	600～700	20.4
20～300	14.89	20～800	17.26	200～300	16.7	700～800	19.5
20～400	14.77	20～900	17.59	300～400	17.3	800～900	20.20
20～500	15.74	20～1000	18.08	400～500	18.2	900～1000	22.38

GH131 Mechanical properties：

Standard number	Variety	Thermal treatment	θ/℃	σb/MPa	σp0.2/MPa	δ₅/%	ψ/%
				≥
GB/T14995  GB/T14996	Hot-rolled plates Cold-rolled sheet	1130℃~1170℃/AC	20	735		34.0
			900	176		40.0
			1000	108		43.0
GJB 1952	Cold-rolled sheet	1130℃~1170℃/AC	20	735		34.0
			900	175		40.0
GJB 1954	Cold-rolled sheet	1130℃~1170℃/AC	20	735		34.0
			900	186		40.0
			1000	110		43.0
GJB 1955	Hot forging (rolling) bars	1160℃±10℃/AC	20	735	345	32.0	40.0
			900	186	—	40.0	45.0
			1000	110		50.0	50.0
YB/T 5245	Hot rolled and forged bars	1160℃±10℃/AC	20	735	343	32	Measured
			1000	108		50	Measured

 

GH131 Alloy properties

Compared with nickel-based alloys for similar purposes, the alloy has poor high-temperature oxidation resistance and microstructure stability. After long-term use at 700°C~900°C, the plasticity of the alloy decreases at room temperature.

GH131 Uses of alloys：

GH131 alloy is used to make rocket engines, combustion chamber partitions, turbine gas intake ducts, gas generator convergence sections, conical guides, turbine bends and flanges and other parts that work for a short time at 700 °C ~ 1000 °C; For aero engines, afterburner cylinders, afterburners, heat shields, stabilizers and adjusting sheets and other parts that work for a long time at 700 °C ~ 750 °C; For ground gas turbines, flame pipes and other parts that work for long periods of time below 700°C.

GH131 Process performance：

Welding process: Hua Nickel GH131 alloy can be connected by spot welding, seam welding and argon arc welding.

Heat treatment: The final heat treatment temperature of plate parts is 1150 °C± 10 °C or 1080 °C~1120 °C, and the intermediate heat treatment temperature is 1000 °C ± 10 °C. Cooling in inert gas or air after heat treatment.

Relevant standards：

GB/T14995、 GB/T14996 、GJB1952A、 GJB1954 、GJB1955 、GJB 2612 、YB/T 5245 、HB/Z140