Super Alloy Inconel 617™ (UNS N06617)

Topics Covered

Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Other Designations
Fabrication and Heat Treatment
     Machinability
     Forming
     Welding
     Heat Treatment
     Forging
     Hot Working
     Cold Working
     Annealing
     Hardening
Applications

Introduction

Super alloys or high performance alloys have good creep and oxidation resistance. They have an ability to function under high temperatures and mechanical stress. They are available in different shapes, and contain a number of elements in a variety of combinations to achieve the desired result. There are three groups of alloys namely cobalt-based, nickel-based, and iron-based alloys. All the three types can be used at temperatures above 540°C (1000°F).

Inconel 617™ is a solid-solution strengthened alloy, and has good oxidation resistance and a wide variety of corrosive media. The datasheet given below will discuss about Inconel 617™.

Chemical Composition

The chemical composition of Inconel 617™ is given in the following table.

Elements Content (%)
Nickel, Ni 48.85-62
Chromium, Cr 20-24.0
Cobalt, Co 10-15
Molybdenum, Mo 8-10
Manganese, Mn ≤ 1
Silicon, Si ≤ 1
Carbon, C ≤ 0.15

Physical Properties

The following table shows the physical properties of Inconel 617™.

Properties Metric Imperial
Density 8.3g/cm³ 0.302 lb/in³
Melting point 1363°C 2485°F

Mechanical Properties

The mechanical properties of Inconel 617™ are displayed in the following table.

Properties Metric Imperial
Tensile strength ≥ 485 MPa ≥ 70300 psi
Yield strength ≥ 275 MPa ≥ 39900 psi
Elongation at break ≥ 25% ≥ 25%
Hardness, Brinell 170 170

Other Designations

Other designation equivalent to Inconel 617™ is DIN 2.4663.

Fabrication and Heat Treatment

Machinability

Inconel 617™ is machined using conventional machining methods which are usually used for iron-based alloys. Machining operations are performed using commercial coolants. High-speed operations such as grinding, milling or turning, are performed using water-base coolants.

Forming

Inconel 617™ can be formed using all conventional techniques.

Welding

Inconel 617™ is welded using gas-tungsten arc welding, shielded metal-arc welding, gas metal-arc welding, and submerged-arc welding methods.

Heat Treatment

Inconel 617™ is heat treated by annealing at 1177°C (2150°F) followed by quenching in water or cooling in air for thinner sections.

Forging

Inconel 617™ is forged at 1010 to 1205°C (1850 to 2200°F).

Hot Working

Inconel 617™ is hot worked at 927 to 1205°C (1700 to 2200°F).

Cold Working

Inconel 617™ can be cold worked using standard tooling.

Annealing

Inconel 617™ is annealed at 1177°C (2150°F) followed by cooling.

Hardening

Inconel 617™ can be hardened by cold working.

Applications

Inconel 617™ is used in industrial furnace components and gas turbines for combustion cans and ducts.

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