Jul 9 2013
Topics Covered
Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties
Fabrication and Heat Treatment
Welding
Annealing
Applications
Introduction
INCONEL alloy 603XL is a nickel-chromium alloy with the addition of molybdenum, silicon, and rare earth elements. The key characteristics of this alloy are its resistance to elevated temperature oxidation and nitridation.
INCONEL alloy 603XL is known to be resistant to oxide spalling thus making this alloy very useful in areas where oxide contamination cannot be tolerated such as electronics, ceramics, glass, and tableware industries.
The following sections will discuss in detail about super alloy INCONEL 603XL.
Chemical Composition
The chemical composition of INCONEL alloy 603XL is outlined in the following table.
|
Element |
Content (%) |
|
Chromium, Cr |
15-23 |
|
Molybdenum, Mo |
4 |
|
Silicon, Si |
2 |
|
Titanium, Ti |
0.5 max |
|
Aluminum, Al |
0.5 max |
|
Manganese, Mn |
0.3 max |
|
Carbon, C |
0.3 max |
|
Rare earths |
0.1 max |
|
Nickel. Ni |
Remainder |
Physical Properties
The physical properties of INCONEL alloy 603XL are tabulated below.
|
Properties |
Metric |
Imperial |
|
Density |
8.54 g/cm3 |
0.308 lb/in3 |
|
Melting point |
1380-1400°C |
2516-2552°F |
Mechanical Properties
The following table shows mechanical properties of INCONEL alloy 603XL alloy.
|
Properties |
Metric |
Imperial |
|
Poisson’s ratio |
0.33 |
0.33 |
|
Elastic modulus |
218.6 GPa |
31.8 psi |
|
Shear modulus |
81.9 GPa |
11.9 psi |
Thermal Properties
The thermal properties of INCONEL alloy 603XL are tabulated below.
|
Properties |
Metric |
Imperial |
|
Thermal expansion co-efficient (@100°C/400°F) |
12.87 µm/m°C |
7.46 µin/in°F |
|
Thermal conductivity(@23°C/200°F) |
11 W/mK |
74.453 BTU in/hr.ft².°F |
Fabrication and Heat Treatment
Welding
Weldability of INCONEL alloy 603XL is rated as good. The commonly used welding method is the gas tungsten arc welding method. Other methods such as the electron beam can also be used. The recommended filler metal is INCONEL Filler Metal 617.
Annealing
Annealing of INCONEL 603XL can be performed by heating between 1100 and 1175°C (2012 and 2147°F) and then air cooled.
Applications
INCONEL alloy 603XL is used in the following application areas:
-
Fixtures
-
Radiant tubes
-
Furnace muffles
-
Furnace mesh belts
-
Strand annealing tubes
-
Refractory anchors.