Jul 9 2013
Topics Covered
Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties
Applications
Introduction
INCOLOY alloy MA956 is an iron-chromium-aluminum alloy that is oxide dispersion strengthened and produced by mechanical alloying. Its production involves high-energy milling of metal powders to produce an alloy with a strengthening yttrium oxide dispersoid. It has exceptional strength and resistance to corrosion, carburization and oxidation at temperatures over 1100°C (2000°F).
The following section will discuss in detail about INCOLOY alloy MA956.
Chemical Composition
The chemical composition INCOLOY alloy MA956 is outlined in the following table.
|
Element |
Content (%) |
|
Iron, Fe |
74 |
|
Chromium, Cr |
20 |
|
Aluminum, Al |
4.5 |
|
Titanium, Ti |
0.5 |
|
Yttrium oxide, Y2O3 |
0.5 |
Physical Properties
The following table shows the physical properties of INCOLOY alloy MA956.
|
Properties |
Metric |
Imperial |
|
Density |
7.25 g/cm3 |
0.262 lb/in3 |
|
Melting point |
1311-1400°C |
2392-2550°F |
Mechanical Properties
The mechanical properties of INCOLOY alloy MA956 are displayed in the following table.
|
Properties |
Metric |
Imperial |
|
Tensile strength (annealed) |
650 MPa |
94300 psi |
|
Yield strength (annealed) |
550 MPa |
79800 psi |
|
Elongation at break (annealed prior to test) |
9% |
9% |
Thermal Properties
The thermal properties of INCOLOY alloy MA956 are given in the following table
|
Properties |
Metric |
Imperial |
|
Thermal expansion co-efficient (@20-100°C/68-212°F) |
11.3 µm/m°C |
6.28 µin/in°F |
|
Thermal conductivity |
10.9 W/mK |
75.6 BTU.in/hrft².°F |
Applications
The following are the list of applications of INCOLOY alloy MA956:
-
Gas-turbine combustion chambers
-
Advanced energy-conversion systems
-
Other applications that involves rigorous conditions.