Nov 26 2012
Topics Covered
Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties
Other Designations
Fabrication and Heat Treatment
Machinability
Forming
Welding
Heat Treatment
Forging
Cold Working
Annealing
Aging
Applications
Introduction
Super alloys are also known as high performance alloys. They have good creep and oxidation resistance, and can be formed in different shapes. They have the ability to function at very high temperatures and severe mechanical stress, and also where high surface stability is required. The strength of the super alloys can be improved by performing work hardening, precipitation hardening, and solid-solution hardening.
Haynes(r) waspalloy is a nickel-based alloy. It has high oxidation resistance and strength at high temperatures. It is available in the form of sheet, bar and forgings. The following datasheet gives an overview of Haynes(r) waspalloy.
Chemical Composition
The following table shows the chemical composition of Haynes(r) waspalloy.
|
Element |
Content (%) |
|
Nickel, Ni |
56 |
|
Chromium, Cr |
19 |
|
Cobalt, Co |
13.5 |
|
Molybdenum, Mo |
4.30 |
|
Titanium, Ti |
3 |
|
Iron, Fe |
≤ 2 |
|
Aluminum, Al |
1.50 |
|
Silicon, Si |
≤ 0.15 |
|
Manganese, Mn |
≤ 0.10 |
|
Carbon, C |
0.080 |
|
Zirconium, Zr |
0.050 |
|
Boron, B |
0.0060 |
Physical Properties
The physical properties of Haynes(r) waspalloy are displayed in the following table.
|
Properties |
Metric |
Imperial |
|
Density |
8.20 g/cm3 |
0.296 lb/in3 |
|
Melting point |
1358°C |
2475°F |
Mechanical Properties
The mechanical properties of Haynes (r) waspalloy are outlined in the following table.
|
Properties |
Metric |
Imperial |
|
Tensile strength |
1335 MPa |
193600 psi |
|
Yield strength (@ strain 0.200%) |
910 MPa |
132000 psi |
|
Modulus of elasticity (@20°C) |
213 GPa |
30900 ksi |
|
Elongation at break (in 51 mm) |
26.6% |
26.6% |
Thermal Properties
The thermal properties of Haynes(r) waspalloy are given in the following table.
|
Properties |
Metric |
Imperial |
|
Thermal expansion co-efficient (@20-500°C/68-932°F) |
13.9 µm/m°C |
7.72 µin/in°F |
|
Thermal conductivity (@ 200°C/392°F) |
12.6 W/mK |
87.4 BTU in/hr.ft².°F |
Other Designations
Other designations that are equivalent to Haynes(r) waspalloy are included in the following table.
|
|
|
|
|
|
|
AISI 685 |
AMS 5706 |
ASTM B637 |
PWA 1007 |
AMS 5544 |
|
AMS 5708 |
DIN 2.4654 |
PWA 1030 |
AMS 5586 |
AMS 5709 |
|
PWA 1005 |
PWA 686 |
AMS 5704 |
AMS 5828 |
PWA 1006 |
|
PWA 687 |
SPS M175 |
|
|
|
Fabrication and Heat Treatment
Machinability
Haynes(r) waspalloy can be machined using conventional methods which are used for iron-based alloys. Commercial coolants are used for performing machining operations. Water-based coolants are used for performing high-speed operations such as milling, grinding or turning. Heavy lubricants are preferred for tapping, drilling, boring or broaching.
Forming
Haynes(r) waspalloy can be formed using all conventional techniques.
Welding
Haynes(r) waspalloy is welded using gas-tungsten arc welding, gas metal-arc welding, shielded metal-arc welding and submerged-arc welding methods.
Heat Treatment
Haynes(r) waspalloy is heat treated by annealing at 1080°C (1975°F) for 4 h followed by cooling.
Forging
Haynes(r) waspalloy is hot forged at 1038 to 1205°C (1900 to 2200°F) followed by cooling.
Cold Working
Haynes(r) waspalloy is cold worked using standard tooling. Soft die materials are used for producing good finish and avoiding galling problems.
Annealing
Haynes(r) waspalloy is annealed at 1080°C (1975°F) for 4 h followed by cooling.
Aging
Haynes(r) waspalloy is aged at 1080°C (1975°F) followed by cooling.
Applications
Haynes(r) waspalloy is suitable for gas turbines used in land/marine or aircraft applications.