Nov 29 2012
Topics Covered
Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties
Other Designations
Introduction
Super alloys or high performance alloys contain many elements in a variety of combinations to achieve a desired result. These alloys are good for use at high temperatures and severe mechanical stress, and also in cases where high surface stability is needed. Super alloys provide good creep and oxidation resistance.
Strengthening of super alloys is performed by work hardening, solid-solution hardening, and precipitation hardening methods. NI SPAN C™ is a nickel-iron-chromium alloy that can be precipitation hardened by adding aluminium and titanium.
The following datasheet will provide more details about NI SPAN C™.
Chemical Composition
The following table shows the chemical composition of NI SPAN C™.
|
Element |
Content (%) |
|
Iron, Fe |
47 |
|
Nickel, Ni |
41.0-43.5 |
|
Chromium, Cr |
4.90-5.75 |
|
Titanium, Ti |
2.20-2.75 |
|
Silicon, Si |
1 |
|
Manganese, Mn |
0.80 |
|
Aluminum, Al |
0.30-0.80 |
|
Carbon, C |
0.060 |
|
Phosphorous, P |
0.040 |
|
Sulfur, S |
0.040 |
Physical Properties
The physical properties of NI SPAN C™ are outlined in the following table.
|
Properties |
Metric |
Imperial |
|
Density |
8.05 g/cm³ |
0.291 lb/in³ |
|
Melting point |
1450-1480°C |
2640-2700°F |
Mechanical Properties
The mechanical properties of NI SPAN C™ are provided below.
|
Properties |
Metric |
Imperial |
|
Tensile strength (precipitation hardened) |
1210 MPa |
175000 psi |
|
Yield strength (@strain 0.200%, precipitation hardened) |
760 MPa |
110000 psi |
|
Elastic modulus |
165-200 GPa |
23900-29000 ksi |
|
Shear modulus |
62-69 GPa |
8990-10000 ksi |
|
Elongation at break (precipitation hardened) |
25% |
25% |
Thermal Properties
The thermal properties of NI SPAN C™ are given below.
|
Properties |
Metric |
Imperial |
|
Thermal expansion co-efficient (@20-100°C/68-212°F) |
7.60 µm/m°C |
4.22 µin/in°F |
|
Thermal conductivity |
12.1 W/mK |
84 BTU in/hr.ft².°F |
Other Designations
Equivalent materials to NI SPAN C™ are:
-
AMS 5221
-
AMS 5223
-
AMS 5225