INCOLOY A-286 Age Hardenable Forged Ring Precipitation Hardened Solution Annealed High Strength for Industrial Turbine

INCOLOY® alloy A-286 (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 and maintains good strength and oxidation resistance at temperatures up to about 1300°F (700°C). The high strength and excellent fabrication characteristics make this alloy useful for various components of aircraft and industrial gas turbines, automotive engine fasteners, and offshore oil and gas applications.

A-286 offers good fabricability comparable to stainless steels and nickel alloys, making it the material of choice for aerospace gas turbines, industrial fasteners, and high-temperature structural components. Through precisely controlled solution annealing at 980°C and aging at 720°C for 16 hours, this forged ring achieves remarkable strength via fine gamma-prime (Ni3Ti) precipitation throughout the austenitic matrix.

• Age Hardenable: Gamma-prime (Ni3Ti) precipitation during 720°C aging delivers a 3× strength increase over solution-annealed condition while retaining excellent ductility (25% elongation).
• High Temperature Strength: Maintains structural integrity and load-bearing capacity at temperatures up to 704°C (1300°F), with good creep-rupture strength during extended high-temperature exposure.
• Oxidation Resistance: Chromium content (13.5-16%) forms a stable, adherent Cr2O3 protective layer, resisting scaling up to 982°C (1800°F) in air and combustion environments.
• Excellent Fabricability: Austenitic in all conditions; readily formed, machined, and welded using standard procedures for stainless steels and nickel alloys.
• Hot Working Range: 1150°C (2100°F) start; final reductions below 980°C (1800°F) should exceed 10% to prevent excessive grain growth.
• Corrosion Resistance: Nickel (24-27%) and chromium contents provide broad resistance to oxidizing and reducing environments, including sulfide-containing atmospheres.

Heat Treatment: Solution 980°C (1800°F) / 1h + Age 720°C (1325°F) / 16h, Air Cool

• Industrial Gas Turbine Rings & Seals: High-stress rotating and static ring components for power generation turbines.
• High-Temperature Automotive Fasteners: Exhaust manifold studs, turbocharger bolts, and cylinder head fasteners subject to sustained thermal cycling.
• Offshore Oil & Gas Connectors: High-stress flanges, clamp connectors, and structural rings in subsea and topside equipment.
• Turbocharger Turbine Wheel Rings: Precision rings for automotive and marine turbocharger assemblies operating at elevated exhaust temperatures.
• High-Pressure Valve Components: Forged ring blanks for valve seats, stems, and bonnet components in high-temperature service.

DINGSCO — PROFESSIONAL NICKEL ALLOY MANUFACTURER

QUALITY ASSURANCE

Our mission is to provide customers with the best quality products. As an ISO 9001:2015, PED 2014/68/EC, and API 6A certified manufacturer, we enforce strict quality control at every production stage. Each forging ring includes full material test certificates (EN 10204 3.1) and traceability documentation.

SCIENCE AND TECHNOLOGY INNOVATION

We pay close attention to customer needs, implement product innovation, and leverage our full range of product types and material grades to provide one-stop service. Continuous improvement drives our material, process, and equipment optimization programs.

COOPERATION

We actively participate in team meetings and support decision-making. We share experience with each other and cooperate with different types of colleagues to deliver the best solutions for our customers.