Incoloy A286
Details
Lork Group high-quality Incoloy A286 (UNS S66286; W. Nr. 1.4980) is an iron-nickel-chromium alloy with additions of molybdenum and titanium. It is age-hardenable for high mechanical properties.
Products Description
Lork Group high-quality Incoloy A286 (UNS S66286; W. Nr. 1.4980) is an iron-nickel-chromium alloy with additions of molybdenum and titanium. It is age-hardenable for high mechanical properties. The alloy maintains good strength and oxidation resistance at temperatures up to about 1300°F (700°C).
The alloy is austenitic in all metallurgical conditions. The high strength and excellent fabrication characteristics of Incoloy A286 make the alloy useful for various components of aircraft and industrial gas turbines. It is also used for fastener applications in automotive engine and manifold components, subject to high levels of heat and stress,s and in the offshore oil and gas industry.
Chemical Composition
|
Element |
Content (%) |
|
Iron, Fe |
54 |
|
Nickel, Ni |
25.5 |
|
Chromium, Cr |
14.8 |
|
Titanium, Ti |
2.13 |
|
Molybdenum, Mo |
1.30 |
|
Manganese, Mn |
1.0 |
|
Silicon, Si |
0.50 |
|
Vanadium, V |
0.30 |
|
Aluminum, Al |
0.18 |
|
Carbon, C |
0.040 |
|
Phosphorous, P |
0.020 |
|
Sulfur, S |
0.015 |
|
Boron, B |
0.0060 |
Physical Properties
|
Properties |
Metric |
Imperial |
|
Density |
7.92 g/cm3 |
0.286 lb/in3 |
|
Melting point |
1399°C |
2550°F |
Mechanical Properties
|
Properties |
Metric |
Imperial |
|
Tensile strength |
1035 MPa |
150100 psi |
|
Yield strength (@strain 0.200%) |
759 MPa |
110000 psi |
|
Elongation at break |
25% |
25% |
|
Reduction of area |
40% |
40% |
|
Hardness, Brinell (estimated from Rockwell C value for Brinell test with 3000 kg load/10 mm diameter ball) |
304 |
304 |
|
Hardness, Knoop (estimated from Rockwell C value) |
330 |
330 |
|
Hardness, Rockwell C |
32 |
32 |
|
Hardness, Vickers (estimated from Rockwell C value) |
318 |
318 |
Cold Working
Super alloy A-286 is capable of being readily cold worked, and a solution anneal heat treatment is recommended when this alloy is work hardened due to severe cold forming. This solution anneal heat treatment will thus enable softening of super alloy A-286.
Welding
Welding methods used for stainless steels are also recommended for super alloy A-286. The area to be welded should be clean. Post-welding heat treatment or preheating is not recommended for this alloy. Better welding results can be obtained when this alloy is solution annealed.
Forging
Heavy forging and light forging are suitable for super alloy A-286. Heavy forging is carried out between 1010-1204°C (1850-2200°F) and light forging between 871-1010°C (1600-1850°F).
Machinability
Conventional machining techniques are used to readily machine super alloy A-286. This machining process involves turning, drilling, and milling. In the turning operations, the usage of cemented carbide tools is recommended for high cutting rates.
Aging
Super alloy A-286 is first solution heat-treated at 982°C (1800°F) before the aging process. Aging takes place for 16 h at 718°C (1325°F) after which this alloy is cooled in air.
Hardening
Super alloy A-286 is hardened by the cold working process and is also capable of being age hardened due to the presence of titanium in this alloy.
Heat Treatment
Super alloy A286 is solution annealed at 982°C (1800°F), oil quenched, held for 16 h at 718°C (1325°F), and finally cooled in air. This heat treatment improves the strength of super alloy A-286.
Applications
Super alloy A-286 is used in gas turbine forgings, fasteners, superchargers, cryogenic equipment, missile components, corrosive deep well hardware, and jet engines.