Stainless steel A286 is a heat and corrosion resistant austenitic iron-base material that can be age hardened to a high strength level. It is designed for use at temperatures up to 704°C (1300°F) where good corrosion resistance, excellent creep strength and high tensile strength are required. The alloy can also be used for low temperature applications that require a ductile, non-magnetic high strength material at temperatures below room temperature.
Chemical Composition
The chemical composition of Grade A286 stainless steel is outlined in the following table.
| Element |
Content (%) |
| Nickel, Ni |
24-27 |
| Chromium, Cr |
13.5-16 |
| Columbium, Nb |
4.75-5.50 |
| Molybdenum, Mo |
1-1.5 |
| Cobalt, Co |
1 max |
| Titanium, Ti |
1.9-2.35 |
| Silicon, Si |
1 max |
| Manganese, Mn |
2 max |
| Copper, Cu |
0.30 max |
| Aluminum, Al |
0.35 max |
| Carbon, C |
0.08 max |
| Tantalum, Ta |
0.05 max |
| Boron, B |
0.003-0.01 |
| Phosphorus, P |
0.025 max |
| Sulfur, S |
0.025 max |
| Iron, Fe |
Balance |
Mechanical properties
The mechanical properties of Grade A286 stainless steel are displayed in the following table.
| Properties |
Metric |
Imperial |
| Tensile strength |
620 MPa |
90000 psi |
| Yield strength |
275 MPa |
40000 ksi |
| Elongation at break |
40% |
40% |
Manufacturing process
Generally, high temperature alloyshigh-temperature alloys are difficult to machine than stainless steels. However, stainless steel A286, an iron-base alloy group iron base alloy is easier to machine than the nickel-based precipitation-hardening gradesthe nickel-based precipitation-hardening grades. Carbon insert tools are commonly used for machining this alloy. Although A286 alloy is harder than other stainless steels, it can be satisfactorily cold drawn and formed. It can be work-hardened rapidly. Forging of this alloy can be performed at temperatures ranging from 1038 to 1121°C (1900 to 2050°F temperature).
A286 alloy can also be produced by argon oxygen decarburization or vacuum induction melting. Vacuum arc or electroslag remelting techniques may be used to refine the alloy.
Applications
The following are some of the major applications of Grade A286 stainless steel:
- Aircraft and industrial gas turbine
- Flange nuts
- Super-charger components
- Jet engines blades
- Castings
- Frames and fasteners
- Sockets
- Screws
- Afterburner parts.