Inconel617 nickel base alloy (Tech Center of Shanghai HY Industry Co., Ltd)

Inconel 617 is a nickel-chromium-cobalt-molybdenum alloy with excellent mechanical properties at high temperatures. The alloy has high temperature corrosion resistance, such as oxidation and carburization.

Inconel617 nickel base alloy has the following properties:

Excellent transient and long-term mechanical properties at high temperatures up to 1100°C

High oxidation resistance at 1100°C

High carbonation resistance at 1100°C

good welding performance

Inconel 617 chemical composition:

%	Ni	Cr	Fe	C	Mn	Si	Mo	Co	Al	Ti	P	S	N	B	Cu	Zr
Min		20		0.04			8	10.0	0.8	0.2
Max	Rest	24	2.0	0.08	0.2	0.2	10.0	13.0	1.5	0.6	0.010	0.010	0.05	0.002	0.2	0.045

Inconel 617 physical properties:

Typical physical properties at room temperature and high temperature Density: ρ=8.4g/cm3

Melting temperature range: 1330～1380℃

Temp ℃	specific heat capacity J/Kg K	Thermal conductivity W/mK	Resistivity μΩcm	Elastic Modulus KN/mm2	Thermal expansion coefficient 10-6/K
20	420	13.4	122	212
93
100	440	14.7	125	206	11.6
200	465	16.3	126	200	12.6
204
300	485	17.7	127	194	13.1
316
400	515	19.3	128	188	13.6
427
500	545	20.9	129	181	13.9
538
600	565	22.5	131	173	14.0
649
700	595	23.9	133	166	14.8
760
800	615	25.5	134	157	15.4
871
900	645	27.1	135	149	15.8
982
1000	665	28.7	138	139	16.3

Inconel 617 mechanical properties:

The properties listed in the table below apply to a given size of Inconel617 nickel base alloy in the solution treated state. Special properties of non-standard size materials are available upon request for specific applications.

Room temperature mechanical properties Min (refer to VdTÜV485)

product shape	Size （mm）	test direction	tensile strength Rm N/mm2	Yield Strength RP0.2 N/mm2	Yield Strength RP1.0 N/mm2	Elongation A5%
Plate / strip	cold rolling≤6	horizontal	750	350	390	35
Plate	hot rolled <80	horizontal	700	300	330	35
Bar	≤300	horizontal	680	300	330	30
	≤300	Radial	680	300	330	35
Pipe	≤150	Radial	700	300	330	35

Mechanical properties of alloys at elevated temperatures (refer to VdTÜV 485)

	N/mm2 (corresponding to each temperature)
	100	200	300	400	500	600	700	750
tensile strength	650	620	600	570	540	510	400	340
0.2% Yield Strength	270	230	220	210	200	190	185	180
1.0% Yield Strength	300	260	250	240	225	210	205	200

Inconel 617ISO-V notch:

Room temperature average: lateral >=100J/cm2

Radial>=150J/cm2

Metallographic structure of Inconel 617:

Inconel617 nickel base alloy has a face-centered cubic lattice structure and has good crystal phase stability. Excellent high temperature strength is obtained through solution hardening, and the alloy is not age hardened.
Inconel 617 corrosion and heat resistance properties:

Inconel 617 alloy has good corrosion resistance in hot corrosion fields such as sulfidation environment, especially in oxidation and carbonization environment up to 1100 °C cycle. These corrosion resistance properties, combined with high-quality mechanical properties, make this alloy particularly suitable for use in high-temperature applications.

In addition, the high content of nickel, chromium and molybdenum makes the alloy have good corrosion resistance in most corrosive media.
Inconel 617 application:

Inconel 617 is suitable for high temperature and higher mechanical stress occasions. The recommended operating temperature does not exceed 1000°C. At the same time, Inconel 617 is suitable for occasions that require weight reduction, such as the processing of thin-walled structural components.

Industrial and Aerospace Turbine Components

air heater

Muffles and Radiation Pavilion

High temperature heat exchangers, valves and springs

High temperature gas cooling of nuclear reactors, such as high temperature components of nuclear reactors – helium/helium medium heat exchanger

Chemical Equipment

Spiral pipes and pipes in the petrochemical industry
Inconel 617 Processing and Heat Treatment

Inconel 617 alloy is easy to process in various hot and cold working processes, but due to its high strength, high power equipment is required.

Inconel 617 alloy has excellent welding performance and can be welded by various welding methods.

Inconel 617 preheating:

The surface of the workpiece must be cleaned before and during heating to keep the surface clean. If the heating environment contains sulfur, phosphorus, lead or other low melting point metals, Inconel 617 alloy will become brittle. Impurities originate from marking paint, chalk, lubricating oil, water, fuel, etc. The sulfur content of the fuel should be low. For example, the impurity content of liquefied petroleum gas and natural gas should be less than 0.1%, the sulfur content of city gas should be less than 0.25g/m3, and the sulfur content of petroleum gas should be less than 0.5%.

The heating electric furnace requires a more precise temperature control capability, the furnace gas must be neutral or weakly oxidizing, and the furnace gas composition should be prevented from fluctuating between oxidizing and reducing. The heating flame cannot directly burn to the workpiece.

During all heating processes, the material must be added to the heated furnace.

Inconel 617 thermal processing:

Due to the very high thermal intensity, considerable processing forces are required for hot working.

The suitable thermal processing temperature for Inconel 617 alloy is 1200-950°C. The cooling method can be water quenching or other rapid cooling methods. The material must be put into the furnace when the heating furnace reaches the Max furnace temperature.

Inconel 617 cold working:

Cold working should be carried out after annealing treatment. The work hardening rate of Inconel 617 is greater than that of austenitic stainless steel, so the processing equipment should be adjusted accordingly, and there should be an intermediate annealing process during cold working.

Solution annealing is required when the cold deformation is greater than 10% or when the cold deformation is greater than 5% for materials with an application temperature higher than 900°C.

Inconel 617 heat treatment:

In order to obtain proper properties, the solution treatment temperature is 1150°C-1200°C, water quenching is necessary to obtain greater creep resistance, and rapid air cooling can also be used for thicknesses less than 1.5mm.

The stress relief annealing temperature can reach 870°C.

During all heat treatments, the aforementioned considerations regarding maintaining cleanliness should be observed.
Inconel 617 grinding:

The oxide near the weld of Inconel 617 workpiece is more difficult to remove than that of stainless steel. Both mechanical and chemical methods can be used

When using mechanical methods, metal contamination and high surface deformation should be avoided. Before pickling in a mixed acid of nitric acid and hydrofluoric acid, it is also necessary to remove oxides with sandpaper or perform a salt bath pretreatment.

Inconel 617 Machining:

The machining of Inconel 617 needs to be carried out after solution treatment. Considering the work hardening of the material, Inconel 617 must use a lower surface cutting speed and heavy feed than low-alloy standard austenitic stainless steel.

Inconel 617 welding:

Inconel alloy 617 is well suited for welding, including tungsten arc welding (GTAW/TIG), manual arc welding (GMAW/MIG), pulsed arc welding, and shielding gas arc welding.

Before welding, the material must be in a solid solution treatment state, and the surface of the material must be clean, free of oil, chalk marks, etc., and the metal within 25mm around the weld must be polished to expose bright metal.

With low heat input, the interlayer temperature does not exceed 150°C.

No pre- or post-weld heat treatment is required.

Recommended welding consumables:
GTAW/GMAW
Nicrofer S 5520
W.-Nr. 2.4627
SG-NiCr22Co12Mo
AWS A 5.14 ERNiCrCoMo-1
SMAW
W.-Nr. 2.4628
EL-NiCr21Co12Mo
AWS A 5.11 ENiCrCoMo-1

Shanghai HY Industry Co., Ltd has international first-class material production equipment such as high temperature alloy isothermal forging production line, CONSARC vacuum melting furnace, VAR vacuum arc remelting furnace etc., with strong professional ability and highly responsible management team. We are a member of China Application of nuclear energy materials, Member of the International Council of the Aeronautical Sciences. Years of experience in Heat Resistant Steels & Superalloys. When you have superalloy material inquiry, please contact us without hesitation. Shanghai HY Industry Co., Ltd is Corrosion & fatigue nickel alloy professional manufacturer,We will provide you with sincere and thoughtful service.

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