NiCo20Cr20MoTi

HuaNickelNiCo20Cr20MoTi is a deformed superalloy based precipitation hardening of Ni-Cr-Co. The alloy has good oxidation resistance below 800°C, high yield strength and creep strength, small strain aging crack tendency, and good cold and heat fatigue resistance. It is suitable for making plate welded structural parts and load-bearing parts for the main combustion chamber and afterburner of aero engine.

NiCo20Cr20MoTiChemical composition：

	Ni	C	Cr	Co	Mo	AI	Ti	Fe	B	Si	Mn	S	P	Cu
Min	Bal	0.04	19	19	5.6	0.3	1.9	≤
Max		0.08	21	21	6.1	0.6	2.4	0.7	0.005	0.5	0.6	0.007	0.015	0.2

NiCo20Cr20MoTiPhysical properties：

Density	8.35g/cm³
Melting point	1320~1375℃
Magnetic properties	无

Coefficient of linear expansion

θ/℃	α/(10-6℃-I)	θ/℃	α/(10-6℃-l)
20～100	11.6	20～600	14.6
20～200	12.2	20～700	15.4
20～300	13.0	20～800	16.2
20～400	13.4	20～900	17.4
20～500	14.1	20～1000	18.0

Resilient performance

θ/℃	20	100	200	300	400	500
Ed/GPa	248	246	241	240	219	212
θ/℃	600	700	800	900	1000
Ed/GPa	196	182	150	144	143

NiCo20Cr20MoTiMechanical properties：

Standard number	variety/mm		heat treatment	θ/℃	Tensile properties			Creep properties			Room temperature hardness Supply status
					σb/MPa	σp0.2/MPa	δ₅/%	σ/MPa	t/h	Ɛt/%
GJB 3165A	Hot rolled and forged rods		Standard heat treatment	780	≥540	≥400	≥12	120	50	≤0.10	一
GJB 1952A	Cold-rolled plate	Non-welded	Standard heat treatment	780	≥540	≥400	≥9	116	50	≤0.10	HV≤230
		For welding	Solution + welding + aging		≥465		≥5
GJB 3317A	Hot rolled plate		Standard heat treatment	780	≥540	≥400	≥9	120	50	≤0.10	HV≤250
GB/T 15062 GJB 2297A	Cold-drawn seamless tubes	<0.5	Standard heat treatment	780	≥540	——		120	50	≤0.10	HV≤230
		≥0.5			≥540	≥400	≥9
GJB 5301	Rings		Standard heat treatment	780	≥540	≥400	≥12	120	50	≤0.10	HBS≤229

NiCo20Cr20MoTiAlloy properties：

The parts must be welded in a solution state, and can be welded by spot welding, seam welding and argon arc welding. In the long-term aging of high temperature or long-term stress aging, there is η phase precipitation.

NiCo20Cr20MoTiUses of alloys：

HuaNickelNiCo20Cr20MoTialloy is used to make aero engine flame cylinders, afterburner cylinders, mounting edges, mounts and pipe fittings.

NiCo20Cr20MoTiProcess performance：

Welding process: The alloy has satisfactory welding process performance, and can be welded by spot welding, seam welding and argon arc welding.

Heat treatment: Surface oxide scale after solution treatment and intermediate annealing is chemically eliminated. The assembly generally does not remove the oxide scale after aging. The parts are not allowed to be chemically removed from the oxide scale after ageing.

Cutting: The alloy can be cut satisfactorily.

Relevant standards：

GB/T15062 、GJB1952A  、GJB 2297A 、GJB3165A、  GJB 3317A 、GJB 5301、HB/Z140