Alloy 286 Pipe Fittings

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Aircraft engine builders, gas turbine operators, nuclear power contractors, and oil and gas processors all specify piping components that must carry load at temperatures where ordinary austenitic stainless steel weakens. Metracore Alloys manufactures Alloy 286 Pipe Fittings for these industries at our ISO-certified production facility and exports them to buyers worldwide. Alloy 286 (UNS S66286) is a precipitation-hardenable iron-nickel-chromium alloy.

It keeps its high tensile strength at working temperatures up to 700°C and resists oxidation and corrosion under sustained thermal load. Fittings produced from this grade stay tight and dimensionally stable through repeated thermal cycles, so designers trust them in critical pressure lines.

Due to its balanced composition of nickel (24-27%), chromium (13.5-16%), and titanium-aluminum hardening elements, Alloy 286 maintains exceptional creep-rupture strength, ductility, and resistance to thermal shock even under continuous exposure to elevated temperatures and severe mechanical stress.

What Are Alloy 286 Pipe Fittings?

Alloy 286 Pipe Fittings comprise pressure-retaining elbows, tees, reducers, and end caps produced from the iron-based superalloy A-286. The material gains its strength from a gamma prime precipitate, Ni3(Ti,Al), formed by solution treating at around 980°C and ageing near 720°C for 16 hours. Nickel at 24-27% stabilises the austenitic matrix. Chromium at 13.5-16% builds the protective oxide film. Under heavy loads, A286 Pipe Fittings behave differently from standard austenitic grades: creep resistance and rupture strength stay high up to 700°C, so welded joints don’t relax or leak. The grade welds with matching filler; post-weld ageing restores full properties. We manufacture Alloy 286 Buttweld Pipe Fittings and Alloy 286 Forged Pipe Fittings for aerospace, power, and process piping.

Why Choose Metracore Alloys?

Metracore Alloys produces each fitting under strict quality assurance procedures, from raw material verification through final dimensional inspection. Standard fittings come pre-beveled for easy welding. Custom dimensions and schedules are made to customer drawings, with third-party inspection available at our site. Mill Test Certificates accompany each batch. A large inventory of common sizes supports immediate dispatch, while our export team manages documentation and freight worldwide. Purchasers also get direct access to technical staff for grade selection. It’s an accountable source for critical alloy piping.

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Table of Content

Alloy 286 Pipe Fittings Specifications

The table below defines our manufacturing scope for UNS S66286 Pipe Fittings, covering sizes, schedules, end preparation, testing, and certification.

Product Range of Alloy 286 Pipe Fittings

Our production covers 8 standard configurations: long and short radius elbows, 45° elbows, equal and reducing tees, concentric and eccentric reducers, and pipe caps.

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Technical Details of Alloy 286 Pipe Fittings

Chemical Composition

Composition limits follow ASTM A453 Grade 660. Titanium and vanadium control the age-hardening response in every production batch.

Element	Content (%)
Nickel (Ni)	24.0 – 27.0
Chromium (Cr)	13.5 – 16.0
Iron (Fe)	Balance
Molybdenum (Mo)	1.00 – 1.50
Titanium (Ti)	1.90 – 2.35
Aluminium (Al)	0.35 max
Vanadium (V)	0.10 – 0.50
Carbon (C)	0.08 max
Manganese (Mn)	2.00 max
Silicon (Si)	1.00 max
Boron (B)	0.010
Phosphorus (P)	0.040 max
Sulphur (S)	0.030 max

Mechanical Properties

Minimum aged-condition values appear below. Buyers use these figures for pressure rating and joint integrity checks.

Property	Value
Tensile Strength	895 MPa min
Yield Strength (0.2% Offset)	585 MPa min
Elongation	15% min
Hardness	248 HB min (aged)
Density	7.94 g/cm³
Melting Range	1370 – 1400°C

Key Features of Alloy 286 Pipe Fittings

Eight characteristics separate Alloy A286 Pipe Fittings from conventional stainless steel versions; all stem from the precipitation-hardened microstructure.

The fittings deliver excellent high-temperature strength, maintaining a minimum tensile capacity of 895 MPa after ageing.
Good oxidation resistance comes from the 13.5-16% chromium content, which forms a stable surface oxide.
Resistance to creep and stress rupture comes from the gamma prime precipitate, which blocks dislocation movement under load.
Corrosion resistance holds up in combustion gases, steam and mildly acidic process media.
The alloy shows good fatigue performance under cyclic engine and exhaust loading.
Excellent structural stability persists through repeated thermal cycling.
Fittings remain suitable for heat-treated applications; a fresh ageing cycle restores properties after welding.
A long operational lifespan cuts replacement frequency in piping runs that are hard to reach once the line is insulated.

Manufacturing & Quality Standards

Dimensional control for our buttweld range follows ASME B16.9, with short radius elbows and 180° returns built to ASME B16.28. Light-wall corrosion-resistant fittings comply with MSS SP-43. Common wrought fitting requirements follow ASTM A960. Raw material for our ASTM A453 Grade 660 Pipe Fittings arrives with chemistry and heat treatment records. Each shipment carries EN 10204 3.1 certification, so traceability runs from melt to finished fitting.

Benefits of Alloy 286 Pipe Fittings

Incorporating this grade into high-temperature operations delivers six key performance advantages.

Strength retention at elevated temperatures removes the need for oversized walls.
Durability under cyclic loading extends inspection intervals in vibrating engine circuits, where downtime costs most.
High oxidation resistance protects the pressure boundary without coatings.
Plants report reduced maintenance and downtime.
Critical engineering applications gain a material with decades of documented history.
Consistent performance over a long service life lowers total cost per operating hour.

Manufacturing Process of Alloy 286 Pipe Fittings

Alloy 286 Pipe Fittings Application

Alloy 286 fittings serve the following application areas, from aircraft engines to pressure piping.

Exporter, Manufacturer & Supplier of Alloy 286 Pipe Fittings in various material and sizes.

FAQs

What are Alloy 286 Pipe Fittings?

Alloy 286 Pipe Fittings are pressure piping connectors made from precipitation-hardened iron-nickel-chromium alloy UNS S66286, built for service up to 700°C.

What is Alloy 286 used for?

The alloy is used in jet engine parts, turbine piping, fasteners, exhaust assemblies, and high-temperature pressure lines.

Is Alloy 286 suitable for high-temperature applications?

Yes, Alloy 286’s aged strength holds to 700°C, and oxidation resistance exceeds common stainless steel limits.

Which standards are followed for Alloy 286 Pipe Fittings?

We manufacture to ASME B16.9, ASME B16.28, MSS SP-43, and ASTM A960, with material certified to ASTM A453 Grade 660.

What industries commonly use Alloy 286 fittings?

Aerospace, power generation, nuclear engineering, oil and gas, chemical processing, and automotive turbocharger production are the main buyers.

Are custom sizes available?

Custom sizes are available. Our works produces non-standard walls, reducing combinations, and cut-to-drawing fittings.

Can Alloy 286 Pipe Fittings be exported internationally?

We export these fittings worldwide with full documentation: EN 10204 3.1 certificates, packing lists, and third-party inspection reports.

How do I request a quotation for Alloy 286 Pipe Fittings?

You can email your size list, quantities, and destination to our sales team; we’ll respond with pricing and lead time.