Haynes 188

HuaNickel Haynes 188 is a Co-Ni-Cr based solution-strengthened superalloy with a service temperature of less than 1100°C. Tungsten is added to the alloy for solution strengthening, so that the alloy has good comprehensive properties; A higher content of chromium and trace lanthanum are added to make the alloy have good high-temperature oxidation resistance. The alloy has good process properties such as cold and hot processing plasticity and welding.

Haynes 188Chemical composition：

	Co	C	Cr	Ni	W	La	Si	Fe	B	Mn	P	S	Cu
Min	Bal	0.05	20	20	13	0.03	0.2	≤
Max		0.15	24	24	16	0.12	0.5	3	0.015	1.25	0.02	0.015	0.007

Haynes 188Physical properties：

Density	9.09g/cm³
Melting point	1300℃~1360℃
Magnetic properties	not

Haynes 188Mechanical properties：

Standard number	variety/mm		heat treatment	Tensile properties				Long-lasting performance				Room temperature hardness HV	Other features
				θ/℃	σp0.2/MPa	σb/MPa	δ₅/%	θ/℃	σ/MPa	τ/h	δ₅/%
					≥					≥
GJB 3317A	Hot-rolled plate		Standard heat treatment	20	380	860	45	815	165	23	10	≤282	Grain size≥ class 4
								927	76	23	15
Q/5B4003	sheet		Standard heat treatment	20	380	860	45	927	76	23	15		Curved; Antioxidant; Grain size
				650	250	620	50
Q/5B 4002	Strips	δ≤0.51		20	380	860	40	927	62	23	8		Bending 180°; Anti-oxidation grain size≥ grade 4
				650	250	620	40
		δ>0.51		20	380	860	45	927	76	23	5
				650	250	620	50
Q/5B 40222	Rods		Standard heat treatment	20	380	860	45	927	90	23	15	HB≤302	Antioxidant
Q/5B4014	Ring forgings			20	380	860	45	927	83	23	15	HB≤293	Antioxidant

Haynes 188Alloy properties：

In the manufacturing process of alloy plate machined parts, any process (such as heat treatment, welding, etc.) should be prevented from carburizing and copper pollution, so as not to damage the mechanical properties and corrosion resistance of the alloy. The corrosion resistance of alloy plates is better than that of GH3536 alloy.

Haynes 188Uses of alloys：

Haynes 188 alloy has been used to make high-temperature components such as combustion chambers, flame barrels, and guide vanes in aero engines. Similar alloys are also widely used in high-temperature components of gas turbines and missiles, such as combustion chambers, tail nozzles, and heat exchangers in the nuclear industry.

Haynes 188Process performance：

Welding process:HuaNickel  Haynes 188 alloy has good welding performance, and various welding processes can be used, among which argon arc welding has the best connection effect, and the joint strength and plasticity are less reduced.

Surface treatment process: The surface oxide film formed by Haynes 188 alloy after heating is firmly combined with the matrix, and it is not easy to wash off by cleaning the stainless steel oxide scale, but the oxide scale should be removed by the composite alkali pickling process.

Relevant standards：

GB/T14992、GJB3317A 、HB/Z140 、Q/5B4002、Q/5B4003、Q/5B4014、Q/5B4022、Q/5B4057