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

British Specs:，American Specs:，German Specs:

**Alloy A-286 / Incoloy A-286 Tube (UNS S66286)** **Product Overview** Alloy A-286 tube is a precipitation-hardenable iron-nickel-chromium superalloy tubular product engineered for high-strength applications in extreme temperature environments. This age-hardenable austenitic alloy maintains exceptional mechanical properties and corrosion resistance at temperatures up to 1300°F (700°C), making it particularly suitable for aerospace, power generation, and high-temperature processing applications where reliability under thermal stress is critical. --- **Chemical Composition (Weight %)** | Element | Content (%) | Role in Alloy | |---------|-------------|---------------| | **Iron (Fe)** | Balance | Base Element | | **Nickel (Ni)** | 24.0-27.0 | Austenite Stabilizer & Strength | | **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 (650°C/1000h)** | 380 MPa | --- **International Standards & Specifications** | Standard Type | Specification | Description | |---------------|---------------|-------------| | **ASTM** | B516 / B517 | Welded and Seamless Tubes | | **AMS** | 5731 / 5732 | Seamless and Welded Tubing | | **ASME** | SB-516 / SB-517 | Boiler and Pressure Vessel Code | | **UNS** | S66286 | Unified Numbering System | | **EN** | 1.4980 | European Standard | | **AWS** | A5.14 | Welding Electrode Specification | --- **Tube Specifications & Availability** **Manufacturing Types:** - **Seamless Tubes:** Superior for high-pressure applications - **Welded Tubes:** Cost-effective for standard applications - **Hydraulic Tubing:** Precision diameters for aerospace - **Heat Exchanger Tubes:** Thin-walled versions **Size Ranges:** - **Outside Diameter:** 1/8" to 12" (3mm to 300mm) - **Wall Thickness:** 0.028" to 1.000" (0.7mm to 25mm) - **Length:** Up to 30 feet (9 meters) standard **Tolerances:** - **OD Tolerance:** ±0.005" for precision tubes - **Wall Thickness:** ±10% standard, ±5% precision - **Straightness:** 0.005" per foot maximum --- **Applications** 1. **Aerospace & Defense** - Jet engine hydraulic lines - Afterburner fuel injector tubes - Aircraft hydraulic systems - Rocket motor components - High-temperature sensor housings 2. **Power Generation** - Gas turbine fuel nozzles - Heat exchanger tubing - Steam turbine components - Nuclear reactor instrumentation - Boiler tube applications 3. **Industrial Processing** - Thermal processing furnace rolls - Heat treatment radiant tubes - High-temperature thermowells - Process heater tubing - Catalytic converter components 4. **Oil & Gas** - Downhole instrumentation - High-pressure hydraulic lines - Thermal recovery systems - Subsea control systems --- **Heat Treatment Specifications** **Solution Annealing:** - Temperature: 1700-1800°F (925-980°C) - Time: 30 minutes per inch of wall thickness - Cooling: Rapid air cool or water quench **Age Hardening (Standard):** - Temperature: 1300-1400°F (705-760°C) - Time: 16-20 hours - Cooling: Air cool to room temperature **Resulting Properties:** - Optimal strength-to-weight ratio - Enhanced stress rupture properties - Improved creep resistance - Maximum corrosion resistance --- **Fabrication & Welding** **Machining Characteristics:** - **Machinability Rating:** 40% (compared to 1212 steel) - **Cutting Speed:** 20-30 SFM for turning - **Tool Material:** Carbide or high-speed steel - **Coolant Requirement:** Essential for heat management **Welding Procedures:** - **Preferred Process:** GTAW (TIG) - **Filler Metal:** AWS A5.14 ERFeCrNi - **Shielding Gas:** Argon or Argon-Helium mix - **Post-Weld Heat Treatment:** Required for optimal properties **Forming & Bending:** - **Cold Bending:** Minimum radius 3x OD - **Hot Forming:** 1600-2200°F range - **Flaring & Flanging:** Suitable with proper tooling --- **Quality Assurance & Testing** **Non-Destructive Testing:** - Eddy current testing - Ultrasonic inspection - Hydrostatic pressure testing - Dye penetrant examination - Radiographic testing (as required) **Certification & Documentation:** - Mill test certificates per EN 10204 3.1/3.2 - Chemical analysis reports - Mechanical test certificates - Heat treatment records - Full material traceability --- **Technical Performance Data** **Temperature-Pressure Ratings:** | Temperature (°F) | Maximum Working Pressure (psi) | |------------------|-------------------------------| | 70 | 5000 | | 400 | 4500 | | 700 | 3800 | | 1000 | 2800 | | 1300 | 1800 | **Corrosion Resistance:** - Excellent oxidation resistance to 1300°F - Good resistance to aqueous corrosion - Superior stress corrosion cracking resistance - Excellent performance in steam environments - Good resistance to industrial atmospheres --- **Comparative Advantages** | Feature | Benefit | |---------|---------| | **High Strength-to-Weight Ratio** | Ideal for weight-sensitive applications | | **Excellent Creep Resistance** | Maintains integrity under sustained load | | **Superior Fatigue Strength** | Withstands cyclic loading conditions | | **Age-Hardenable** | Precise property control through heat treatment | | **Good Fabricability** | Excellent welding and forming characteristics | --- **Maintenance & Service Considerations** **Inspection Intervals:** - Regular visual inspection for surface condition - Periodic ultrasonic thickness monitoring - Dye penetrant testing for critical applications - Pressure testing during maintenance shutdowns **Service Life Factors:** - Proper heat treatment essential for maximum life - Avoid thermal cycling beyond design limits - Monitor for oxidation at elevated temperatures - Regular cleaning to prevent corrosion buildup --- **Conclusion** Alloy A-286 tube represents a premium solution for high-temperature, high-stress applications where reliability and performance are paramount. Its unique combination of age-hardening capability, excellent high-temperature strength, and superior corrosion resistance makes it the material of choice for critical applications in aerospace, power generation, and industrial processing. Available in various sizes, wall thicknesses, and heat treatment conditions, A-286 tube continues to provide engineers with a reliable and versatile material solution for the most demanding thermal and mechanical environments, ensuring long-term performance and safety in critical applications worldwide.

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 2720 gallon liquid totes Special package is available on request.