Lega A286
Alloy A286 is an iron-nickel-chromium age-hardenable superalloy. It is designed for applications requiring high strength and good corrosion resistance at temperatures up to 1300°F (700°C). It is often referred to as "Grade 660" stainless steel.
- Forme comuni: Round Bar, Hex Bar, Wire, Sheet, Fasteners.
- Caratteristiche principali: Excellent high-temperature strength at a lower cost than Nickel-base alloys.
- Tempra: Age-hardened via Titanium and Aluminum additions.
- Magnetic Permeability: Non-magnetic, even at cryogenic temperatures.
Alloy A286 bridges the gap between conventional stainless steels and expensive nickel-base superalloys (like Inconel 718). It offers significant strength improvements over 304/316 stainless via precipitation hardening, while maintaining excellent oxidation resistance. It is the industry standard material for jet engine fasteners and automotive turbocharger components.
High Strength Fasteners
Can be aged to tensile strengths above 130 ksi (896 MPa), making it the default choice for bolts holding engines together at high heat.
Cryogenic Stability
Remains ductile and non-magnetic down to -320°F (-196°C), making it excellent for cryogenic tanks and superconducting hardware.
Creep Resistance
Maintains structural stability under load at temperatures up to 1300°F, where standard stainless steels would deform.
| Elemento | Contenuto (%) |
|---|---|
| Nichel (Ni) | 24.0 - 27.0 |
| Cromo (Cr) | 13.5 - 16.0 |
| Titanio (Ti) | 1.90 - 2.35 |
| Molibdeno (Mo) | 1.0 - 1.5 |
| Vanadium (V) | 0.10 - 0.50 |
| Alluminio (Al) | 0.35 max |
| Ferro (Fe) | Equilibrio |
*Note: The Titanium addition is what allows this alloy to be precipitation hardened.
| Forma del prodotto | Norme (AMS / ASTM) |
|---|---|
| Bars, Forgings (Sol. Treated) | AMS 5731, ASTM A638 (Grade 660 Type 1) |
| Bars (Sol. Treated & Aged) | AMS 5732 (Most Common), AMS 5737 |
| Lamiera, striscia, piastra | AMS 5525 |
| Elementi di fissaggio | ASTM A453 (Grade 660) |
| Proprietà | Valori tipici (temperatura ambiente) |
|---|---|
| Resistenza alla trazione | 130 - 150 ksi (896 - 1034 MPa) |
| Resistenza allo snervamento (offset 0,2%) | 85 - 105 ksi (586 - 724 MPa) |
| Allungamento | 15 - 25 % |
| Durezza (Rockwell C) | 24 - 35 HRC |
| Creep Rupture (1200°F) | 23 hours min @ 65 ksi stress |
*Note: Properties vary based on the specific aging cycle (e.g., AMS 5737 offers higher creep strength but lower tensile).
Aerospace Fasteners
High-strength bolts, screws, and studs used in jet engines and airframes.
Automotive Turbochargers
Turbine wheels and housing components exposed to hot exhaust gases.
Petrolio e gas
Downhole components and manifolds requiring moderate corrosion resistance and high strength.
Cryogenic Equipment
Non-magnetic structural parts for superconducting magnets and MRI machines.
Need A286 Bar or Fastener Stock?
We stock Alloy A286 (Grade 660) in solution treated and aged conditions. Available in round bar, hex bar, and sheet.
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