Dec 14 2012
Topics Covered
IntroductionChemical CompositionPhysical PropertiesMechanical PropertiesThermal PropertiesOther DesignationsApplication
Introduction
Super alloys or high performance alloys are available in a variety of shapes and contain elements in different combinations to obtain a specific result. These alloys are of three types that include iron-based, cobalt-based and nickel-based alloys. The nickel-based and cobalt-based super alloys are available as cast or wrought alloys according to their composition and application.
Super alloys have good oxidation and creep resistance and can be strengthened by precipitation hardening, solid-solution hardening and work hardening methods. They can also function under high mechanical stress and high temperatures and also in places that require high surface stability.
The following datasheet provides an overview of super alloy 46.
Chemical Composition
The chemical composition of super alloy 46 is outlined in the following table.
| Element |
Content (%) |
| Nickel, Ni |
46 |
| Silicon, Si |
0.30 |
| Sulfur, S |
0.025 |
| Chromium, Cr |
0.025 |
| Carbon, C |
0.05 |
| Iron. Fe |
Remainder |
Physical Properties
The following table shows the physical properties of super alloy 46.
| Properties |
Metric |
Imperial |
| Density |
8.165 g/cm3 |
0.295 lb/in3 |
| Melting point |
1427°C |
2600°F |
Mechanical Properties
The mechanical properties of super alloy 46 are displayed in the following table.
| Properties |
Metric |
Imperial |
| Tensile strength |
552 MPa |
80 ksi |
| Yield strength |
242 MPa |
35 ksi |
| Elongation at break |
30% |
30% |
Thermal Properties
The thermal properties of super alloy 46 are given in the following table.
| Properties |
Metric |
Imperial |
| Thermal expansion co-efficient |
7.9 µm/m°C |
4.4 µin/in°F |
| Thermal conductivity |
0.11 W/mK |
79.2 BTU in/hr.ft².°F |
Other Designations
Equivalent materials to super alloy 46 are given below:
- ASTM F-30
- MIL 1-23011 CL 4
- AMS 1-23011 CL 4
Application
Super alloy 46 is used in metal and glass seals for hermetic and electronic tubes.