Alloy A286
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Alloy A286
A-286 alloy is an age-hardenable iron base superalloy for applications requiring high strength from -320°F up to 1000°F long time, 1300-1500°F short time. Oxidation resistance is high for continuous service to 1500°F, intermittent to 1800°F. Aqueous corrosion resistance is comparable to 316/316L stainless. Heat treatment according to AMS 5525 requires a solution anneal at 1800°F, air cool. Age at 1325°F for 16 hours and then air cool.
Applications
Valve parts, Paper mills, aircraft and power generation, chemical processing, nuclear and space craft.
Heat Treatment
Solution heat treatment, heat at 1875/1925f (1024/1052c cool to below 90f (32c) to allow material to fully martensite. Material can be air cooled, but should be rapidly quenched for best response to aging.
Aging
All solution treated materials: Condition H-900 4hrs and air cool. H-900 offers the best combination of ductility, strength and toughness. H-1150 increases ductility but decreases strength.
Mechanical Properties
* 70°F to indicated temperature.
Representative Tensile Properties, Sheet
| Temperature, °F | 70* | 70 | 400 | 800 | 1000 | 1200 | 1400 |
| Ultimate Tensile Strength, ksi | 95* | 145 | 143 | 138 | 131 | 103 | 64 |
| 0.2% Yield Strength, ksi | 50* | 95 | 93 | 93 | 87 | 88 | 62 |
| Elongation, % | 40* | 24 | 21 | 18 | 18 | 13 | 18 |
Chemical Composition(%)
| Cr | Ni | Mo | Co | Va | Al | Ti | B | C | Fe | Mn | Si | Ph | S | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| MIN | 13.5 | 24.0 | 1.0 | - | 0.1 | - | 1.9 | 0.003 | - | - | - | - | - | - |
| MAX | 16.0 | 27.0 | 1.5 | 1.0 | 0.5 | 0.35 | 2.35 | 0.01 | 0.08 | Balance | 2.0 | 1.0 | 0.025 | 0.025 |
Specifications
AMS 5525, AMS 5732, AMS 5737, AMS 5804
EN 1.4980
GE B50T1181, GE B50T12, GE B50T81
UNS S66286
Werkstoff 1.4980
Inventory
A-286 Coil, A-286 Hex Bar, A-286 Round Bar, A-286 Sheet
Common Trade Names
A286 Stainless, A286 Alloy
Features
Applications
Physical Properties
Density: 0.303 lb/inch3
Melting Range: 2350-2460°F
| Temperature, °F | 200 | 800 | 1000 | 1200 | 1400 |
| Coefficient of Thermal Expansion, in/in°F x 10-6 | 9.2 | 9.6 | 9.8 | 9.9 | 10.3 |
| Thermal Conductivity Btu • ft/ft2 • hr • °F |
8.0 | 9.8 | 13.0 | 14.1 | - |
| Modulus of Elasticity, psi X 106 |
- | - | 24 | 22 | 23 |
* Annealed
Typical Stress-Rupture Strength 1800°F/1325°F Heat Treat
| Temperature, °F | 1000 | 1100 | 1200 |
| 100 Hours, ksi | 99 | 81 | 61 |
| 1,000 Hours, ksi | 88 | 71 | 46 |
