AMS 5586 Waspaloy Alloy Pipe
AMS 5586 is an Aerospace Material Specification detailing requirements for Waspaloy alloy pipes, including chemical composition, mechanical properties, heat treatment, manufacturing processes, testing, and quality control.
This specification is available as welded and drawn tubing and commonly vacuum-induction and consumable electrode remelted. AMS 5586 is intended for parts that require high-temperature creep and stress rupture properties.
AMS 5586 Waspaloy Alloy Pipe superalloy that can be used at temperatures up to 1200°F (650°C) for critical rotating applications, such as rotating parts, and up to 1600°F (870°C) for less demanding applications.
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Heat Treatment
AMS 5586 Waspaloy Alloy Pipe heat treatment is as follows:
Solution treatment – heat at 1975°F (1080°C) and air cool for 4 hours to produce hardness of 20-25 Rockwell C;
Stabilization – reheat to 1550°F (845°C), and air cool for 24 hours;
Age harden – reheat to 1400°F (760°C) and air cool for 16 hours to achieve a hardness of 34-40 Rockwell C;
Please note that scale may be formed on the alloy during heat treatment in oxidizing atmospheres. However, this doesn't affect the properties of the alloy and can be removed by acid pickling or mechanically.
Chemical Composition
|
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
|
Properties |
Metric |
Imperial |
|
Density |
8.20 g/cm3 |
0.296 lb/in3 |
|
Melting point |
1358°C |
2475°F |
Mechanical Properties
|
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% |
Welded
AMS 5586 can be readily welded only in carefully controlled circumstances, using argon-arc methods and the Waspaloy AMS 5828 filler metal. Welds should be avoided in high-stress environments.
Hot working of AMS 5586 is done at 2140-1800°F (1170-980°C), while hydroforming, drawing, spinning, bending, and rolling can be used for cold working.
-
Manufacturing & Processing
Forming: Typically seamless, via extrusion or rotary piercing; challenging due to work hardening.
Heat Treatment: Solution annealing followed by aging (e.g., 1080°C solution treatment, 845°C stabilization, 760°C aging).
Machining/Welding: Requires specialized techniques to avoid stress cracking; post-weld heat treatment is often necessary.
-
Applications
Aerospace: Jet engine components (exhaust systems, turbine casings), fuel delivery.
Energy: Gas turbines (power generation), high-pressure piping.
-
Testing & Quality Assurance
Mechanical Testing: Tensile, yield strength, elongation, and impact tests at room/elevated temperatures.
NDT: Ultrasonic, radiographic, or dye penetrant inspection.
Chemical Analysis: Ensures compliance with AMS standards.
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