Dec 18 2012
Topics Covered
Chemical CompositionPhysical PropertiesMechanical PropertiesThermal PropertiesApplications
Super alloys or high performance alloys have an ability to function at temperatures above 540ºC(1000ºF) with deformation resistance and high surface stability. As they have good oxidation and creep resistance, super alloys can be forged, rolled to sheet or produced in various shapes. Iron-base, nickel-base and cobalt-base alloys are the major types of super alloys. Nickel-base and cobalt-base super alloys may be cast or wrought based on its composition or application. The iron-base super alloys are generally wrought alloys with stainless steel technology. These alloys can be strengthened by precipitation hardening, work hardening and solid-solution hardening.
The following datasheet provides a detailed description of super alloy Constantan ™.
Chemical Composition
The following table shows the chemical composition of super alloy Constantan ™ wire type E.
| Element |
Content (%) |
| Copper, Cu |
55 |
| Nickel, Ni |
45 |
Physical Properties
The following table shows the physical properties of super alloy Constantan ™ wire type E.
| Properties |
Metric |
Imperial |
| Density |
8.86 g/cm³ |
0.320 lb/in³ |
| Melting point |
1220°C |
2230°F |
Mechanical Properties
The mechanical properties of super alloy Constantan ™ wire type E are displayed in the following table.
| Properties |
Metric |
Imperial |
| Tensile strength at break (annealed) |
414 MPa |
60000 psi |
| Elongation at break |
<45% |
<45% |
| Hardness |
100-300 |
100-300 |
| Modulus of elasticity |
162 GPa |
23496 ksi |
Thermal Properties
The thermal properties of super alloy Constantan ™ wire type E are displayed in the following table.
| Properties |
Metric |
English |
| Thermal expansion co-efficient (@20°C/68°F) |
8.30 µm/m°C |
4.61 µin/in°F |
| Thermal conductivity |
21.8 W/mK |
151 BTU in/hr.ft².°F |
Applications
Super alloy Constantan ™ is widely used in the manufacture of thermocouples.