Inconel617 nickel base alloy test chemical composition

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

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