Alloy A-286，Incoloy A-286 Pipe，,E FORU

British Specs:，American Specs:，German Specs:

**Alloy A-286 / Incoloy A-286 Pipe (UNS S66286)** **Product Overview** Alloy A-286 pipe is a precipitation-hardenable iron-nickel-chromium superalloy tubular product designed for high-strength applications in elevated temperature service environments. This age-hardenable austenitic alloy maintains exceptional mechanical properties and corrosion resistance at temperatures up to 1300°F (700°C), making it ideal for high-pressure and high-stress applications in aerospace, power generation, and chemical processing industries. --- **Chemical Composition (Weight %)** | Element | Content (%) | Role in Alloy | |---------|-------------|---------------| | **Iron (Fe)** | Balance | Base Element | | **Nickel (Ni)** | 24.0-27.0 | Austenite Stabilizer & Strength Provider | | **Chromium (Cr)** | 13.5-16.0 | Oxidation & Corrosion Resistance | | **Molybdenum (Mo)** | 1.0-1.5 | Solid Solution Strengthening | | **Titanium (Ti)** | 1.9-2.35 | Primary Age-Hardening Element | | **Aluminum (Al)** | ≤0.35 | Secondary Hardening Element | | **Vanadium (V)** | 0.10-0.50 | Strengthening Element | | **Boron (B)** | 0.003-0.010 | Grain Boundary Strengthening | | **Carbon (C)** | ≤0.08 | Controlled for Stability | | **Manganese (Mn)** | ≤2.00 | Workability Enhancement | --- **Physical & Mechanical Properties** **Physical Properties:** | Property | Value | |----------|-------| | **Density** | 7.93 g/cm³ (0.286 lb/in³) | | **Melting Point** | 1390-1430°C (2534-2606°F) | | **Thermal Expansion Coefficient** | 14.2 μm/m·°C (20-100°C) | | **Thermal Conductivity** | 18.0 W/m·K @ 100°C | | **Modulus of Elasticity** | 201 GPa (29.2 × 10⁶ psi) | | **Specific Heat** | 460 J/kg·K @ 20°C | **Mechanical Properties (Age-Hardened Condition):** | Property | Value | |----------|-------| | **Tensile Strength** | 895-1100 MPa (130-160 ksi) | | **Yield Strength (0.2% Offset)** | 585-860 MPa (85-125 ksi) | | **Elongation** | 15-25% | | **Hardness** | 248-321 HB | | **Creep Rupture Strength** | 380 MPa @ 650°C | --- **International Standards & Specifications** | Standard Type | Specification | Description | |---------------|---------------|-------------| | **ASTM** | B516 / B517 | Welded and Seamless Pipe | | **AMS** | 5731 | Pipe and Tubing General Specification | | **ASME** | SB-516 / SB-517 | Boiler and Pressure Vessel Code | | **UNS** | S66286 | Unified Numbering System | | **EN** | 1.4980 | European Standard | --- **Pipe Specifications & Availability** **Types & Sizes:** - **Seamless Pipe:** Superior for high-pressure applications - **Welded Pipe:** Cost-effective for standard applications - **Size Range:** 1/8" to 24" NPS - **Schedule:** SCH 10S to SCH 160 - **Length:** Random (16-24 feet) or cut-to-length **Heat Treatment Conditions:** - **Solution Annealed:** Optimal for fabrication - **Age Hardened:** Maximum strength condition - **Annealed & Pickled:** Ready for service --- **Applications** 1. **Aerospace Systems** - Aircraft hydraulic lines - Engine fuel and oil systems - High-pressure air ducts - Afterburner fuel lines 2. **Power Generation** - High-temperature steam lines - Gas turbine fuel systems - Heat exchanger tubing - Boiler feedwater systems 3. **Chemical Processing** - High-temperature process lines - Catalyst carrier tubes - Reactor cooling systems - High-pressure chemical transfer 4. **Industrial Applications** - High-temperature hydraulic systems - Thermal fluid transfer lines - Heat treatment furnace piping - Nuclear component piping --- **Heat Treatment Specifications** **Solution Annealing:** - Temperature: 1700-1800°F (925-980°C) - Soaking Time: 30 minutes per inch of wall thickness - Cooling: Rapid air cool or water quench **Age Hardening:** - Temperature: 1300-1400°F (705-760°C) - Time: 16-20 hours - Cooling: Air cool to room temperature --- **Fabrication & Welding** **Machining Characteristics:** - Best machined in solution-treated condition - Use positive rake angles and sharp tools - Recommended speeds: 20-30 SFM - Use abundant coolant for heat dissipation **Welding Procedures:** - **Processes:** GTAW (TIG), GMAW (MIG) - **Filler Metal:** AWS A5.14 ERFeCrNi - **Preheat:** Not required - **Post-Weld Heat Treatment:** Full solution treat and age **Forming & Bending:** - Good cold forming characteristics - Minimum bend radius: 3x pipe diameter - Hot forming temperature: 1600-2200°F --- **Quality Assurance & Testing** **Non-Destructive Testing:** - Hydrostatic testing per ASTM standards - Eddy current testing - Ultrasonic testing - Dye penetrant inspection **Certification & Documentation:** - Mill test certificates per EN 10204 3.1/3.2 - Chemical analysis reports - Mechanical test reports - Heat treatment charts - Full material traceability --- **Technical Specifications** **Pressure-Temperature Ratings:** | Temperature (°F) | Maximum Pressure (psi) SCH 40 | |------------------|------------------------------| | 70 | 3200 | | 400 | 2800 | | 700 | 2400 | | 1000 | 1800 | | 1300 | 1200 | **Corrosion Resistance:** - Excellent oxidation resistance up to 1300°F - Good resistance to aqueous corrosion - Superior stress corrosion cracking resistance - Excellent performance in steam environments --- **Comparative Advantages** | Feature | Benefit | |---------|---------| | **High Strength at Temperature** | Maintains integrity under extreme conditions | | **Excellent Fatigue Resistance** | Ideal for cyclic pressure applications | | **Good Oxidation Resistance** | Long service life in high-temperature environments | | **Age-Hardenable** | Precise property control through heat treatment | | **Superior Fabricability** | Excellent welding and forming characteristics | --- **Maintenance & Service** **Inspection Guidelines:** - Regular visual inspection for surface degradation - Periodic ultrasonic thickness testing - Monitor for signs of creep damage - Check for thermal fatigue cracking **Service Life Considerations:** - Proper heat treatment essential for maximum life - Avoid thermal cycling beyond design limits - Monitor for oxidation at elevated temperatures - Regular maintenance of support systems --- **Conclusion** Alloy A-286 pipe offers an exceptional combination of high-temperature strength, corrosion resistance, and fabrication versatility, making it the preferred choice for demanding applications in aerospace, power generation, and chemical processing industries. Its unique age-hardening capability allows for precise control of mechanical properties, while its excellent welding and forming characteristics enable the construction of complex high-temperature piping systems. Available in various sizes, schedules, and heat treatment conditions, A-286 pipe continues to provide reliable performance in the world's most challenging engineering environments, ensuring safety and longevity in critical high-temperature applications.

Packing of Standard Packing: Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and steel drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Solutions are packaged in polypropylene, plastic or glass jars up to palletized 2719 gallon liquid totes Special package is available on request.