Nov 19 2012
Topics Covered
Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties
Other Designations
Fabrication and Heat Treatment
Machinability
Forming
Welding
Annealing
Hardening
Applications
Introduction
Super alloys have the capacity to function at very high temperatures and under extreme mechanical stress, and also where high surface stability is required. They consist of a number of elements in a variety of combinations to achieve the desired result. They are available in different forms, and have good creep and oxidation resistance. They are categorized into three groups such as cobalt-based, nickel-based, and iron-based alloys.
Ametek 899A™ is a commercially pure wrought nickel alloy. It has high thermal and electrical conductivities, and good corrosion resistance. The datasheet given below provides an overview of Ametek 899D™.
Chemical Composition
The following table outlines the chemical composition of Ametek 899D™.
|
Element |
Content (%) |
|
Nickel, Ni |
99.6 |
|
Manganese, Mn |
≤ 0.25 |
|
Iron, Fe |
≤ 0.050 |
|
Magnesium, Mg |
≤ 0.035 |
|
Carbon, C |
0.010-0.020 |
|
Copper, Cu |
≤ 0.0050 |
|
Silicon, Si |
≤ 0.0020 |
|
Sulfur, S |
≤ 0.0010 |
Physical Properties
The physical properties of Ametek 899D™ are given in the following table.
|
Properties |
Metric |
Imperial |
|
Density |
8.90 g/cm³ |
0.322 lb/in³ |
|
Melting point |
1444°C |
2630°F |
Mechanical Properties
The mechanical properties of Ametek 899D™ are displayed in the following table.
|
Properties |
Metric |
Imperial |
|
Tensile strength |
408 MPa |
59200 psi |
|
Yield strength |
128 MPa |
18600 psi |
|
Poisson’s ratio |
0.31 |
0.31 |
|
Elongation at break (in 2 in.) |
42% |
42% |
|
Hardness, Vickers |
85 |
85 |
Thermal Properties
The thermal properties of Ametek 899D™ are highlighted in the following table.
|
Properties |
Metric |
Imperial |
|
Thermal conductivity (@70°C/158°F) |
86 W/mK |
597 BTU in/hr.ft².°F |
Other Designations
Other designations that are equivalent to Ametek 899D™ include:
Fabrication and Heat Treatment
Machinability
Ametek 899D™ is machined using conventional methods.
Forming
Ametek 899D™ can be cold and hot formed using conventional methods.
Welding
Ametek 899D™ is welded, brazed, or soldered using conventional methods. Before performing this process, all foreign objects should be removed in order to ensure high weld integrity.
Annealing
Ametek 899D™ is annealed by soaking at 705 to 927°C (1300-1700°F) followed by cooling.
Hardening
Ametek 899D™ is not hardened by heat treatment.
Applications
Ametek 899D™ has the following applications:
-
Lead frames
-
Transistors
-
Temperature sensors
-
Transducers
-
Electronic components