Nov 15 2012
Topics Covered
Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties
Other Designations
Fabrication and Heat Treatment
Machinability
Forming
Welding
Heat Treatment
Forging
Hot Working
Cold Working
Annealing
Hardening
Applications
Introduction
Super alloys comprise different kinds of elements in a variety of combinations to obtain the desired result. They have good creep and oxidation resistance. They can function at very high temperatures and severe mechanical stress, and also where high surface stability is required. There are three groups of alloys such as cobalt-based, nickel-based, and iron-based alloys. All of these can function at temperatures above 540°C (1000°F).
Ametek 899A™ is a nickel-based alloy. The following datasheet gives more details about Ametek 899A™.
Chemical Composition
The chemical composition of Ametek 899A™ is outlined in the following table.
|
Element |
Content (%) |
|
Nickel, Ni |
≥ 99.97 |
|
Carbon, C |
0.0050-0.020 |
|
Iron, Fe |
≤ 0.0050 |
|
Copper, Cu |
≤ 0.0010 |
|
Sulfur, S |
≤ 0.0010 |
|
Silicon, Si |
≤ 0.0010 |
|
Manganese, Mn |
≤ 0.0010 |
Physical Properties
The following table shows the physical properties of annealed Ametek 899A™.
|
Properties |
Metric |
Imperial |
|
Density |
8.90 g/cm³ |
0.322 lb/in³ |
|
Melting point |
1455°C |
2650°F |
Mechanical Properties
The mechanical properties of Ametek 899A™ are displayed in the following table.
|
Properties |
Metric |
Imperial |
|
Tensile strength |
345-400 MPa |
50000-58000 psi |
|
Yield strength (at strain 0.200%) |
103-138 MPa |
14900-20000 psi |
|
Poisson’s ratio |
0.31 |
0.31 |
|
Elongation at break (typical) |
40-45% |
40-45% |
|
Hardness, Rockwell B |
≤ 46 |
≤ 46 |
|
Hardness, Vickers |
64-90 |
64-90 |
Thermal Properties
The thermal properties of Ametek 899A™ are highlighted in the following table.
|
Properties |
Metric |
Imperial |
|
Thermal conductivity (at 70°C/158°F) |
86 W/mK |
597 BTU in/hr.ft².°F |
Other Designations
Other designations that are equivalent to Ametek 899A™ include:
Fabrication and Heat Treatment
Machinability
Ametek 899A™ can be machined using conventional methods.
Forming
Ametek 899A™ can be formed using conventional methods.
Welding
Ametek 899A™ is welded using conventional methods.
Heat Treatment
Ametek 899A™ is heat treated by annealing at 816°C (1500°F) followed by cooling.
Forging
Ametek 899A™ is forged at temperatures ranging from 705 to 1038°C (1300 to 1900°F).
Hot Working
Ametek 899A™ is hot worked at temperatures ranging from 705 to 983°C (1300 to 1800°F).
Cold Working
Ametek 899A™ can be easily cold worked using conventional techniques.
Annealing
Ametek 899A™ is annealed at 816°C (1500°F) followed by cooling.
Hardening
Ametek 899A™ is hardened by cold working.
Applications
Ametek 899A™ is used in the following applications:
-
Electronic cathodes or anodes
-
Resistance thermometers
-
Fluorescent light components