Alloy 86,Nimonic 86 Tube,,E FORU

British Specs:，American Specs:，German Specs:

### Technical Datasheet: Alloy 86 / Nimonic 86 Tube --- #### **1. Introduction** **Alloy 86** (commercially known as **Nimonic 86**) is a nickel-chromium-cobalt superalloy specifically engineered for extreme high-temperature service in aggressive environments. In **tube** form, this material provides exceptional performance in applications requiring superior oxidation resistance, carburization resistance, and structural stability at temperatures up to **1150°C (2100°F)**. The tube product is ideal for heat exchangers, instrumentation, and fluid conveyance systems where reliability under thermal stress is critical. --- #### **2. Chemical Composition (Weight %)** | Element | Content (%) | Role in the Alloy | |---------|-------------|-------------------| | **Nickel (Ni)** | Balance | Austenitic matrix, high-temperature stability | | **Chromium (Cr)** | 24.0–27.0 | Superior oxidation and corrosion resistance | | **Cobalt (Co)** | 15.0–20.0 | Solid solution strengthening | | **Iron (Fe)** | ≤ 7.0 | Residual element | | **Carbon (C)** | 0.05–0.10 | Grain boundary strengthening | | **Silicon (Si)** | 0.2–0.6 | Oxidation resistance enhancement | | **Manganese (Mn)** | ≤ 0.5 | Deoxidation | | **Titanium (Ti)** | ≤ 0.5 | Residual element | | **Copper (Cu)** | ≤ 0.5 | Residual element | | **Aluminum (Al)** | ≤ 0.5 | Residual element | | **Zirconium (Zr)** | ≤ 0.05 | Creep property enhancement | | **Boron (B)** | ≤ 0.005 | Grain boundary strengthening | --- #### **3. Physical Properties** | Property | Value | Condition | |----------|-------|-----------| | **Density** | 8.16 g/cm³ (0.295 lb/in³) | At 20°C | | **Melting Range** | 1350–1400°C (2460–2550°F) | — | | **Thermal Expansion Coefficient** | 14.2 μm/m·°C | 20–100°C | | **Thermal Conductivity** | 12.1 W/m·K | At 20°C | | **Specific Heat** | 450 J/kg·K | At 20°C | | **Modulus of Elasticity** | 215 GPa (31.2 × 10⁶ psi) | At 20°C | | **Electrical Resistivity** | 1.25 μΩ·m | At 20°C | --- #### **4. Mechanical Properties (Solution Annealed)** **Room Temperature Properties:** - **Tensile Strength**: 690–830 MPa (100–120 ksi) - **Yield Strength (0.2% Offset)**: 310–450 MPa (45–65 ksi) - **Elongation**: 30–45% - **Hardness**: 180–230 HB **Elevated Temperature Performance:** - **800°C (1470°F)**: Tensile Strength ≈ 450 MPa (65 ksi) - **1000°C (1830°F)**: Tensile Strength ≈ 150 MPa (22 ksi) - **1100°C (2010°F)**: Tensile Strength ≈ 80 MPa (12 ksi) **Pressure Capability:** - Maintains structural integrity under internal pressure at high temperatures - Excellent resistance to collapse under external pressure - Suitable for high-pressure applications up to 690 bar (10,000 psi) --- #### **5. Key Characteristics & Advantages** - **Exceptional High-Temperature Strength**: Maintains mechanical properties under thermal and pressure stress - **Superior Oxidation Resistance**: Chromium content provides long-term protection in oxidizing atmospheres - **Excellent Carburization Resistance**: Superior performance in carburizing environments - **Good Sulfidation Resistance**: Withstands sulfur-containing atmospheres - **Excellent Creep Resistance**: Suitable for long-term service under sustained load - **Good Fabricability**: Can be bent, formed, and welded with proper techniques - **Thermal Stability**: Resists dimensional changes and property degradation during thermal cycling --- #### **6. Product Applications** **Heat Treatment Industry:** - Radiant tubes for carburizing and neutral hardening furnaces - Retort tubes for atmosphere heat treatment - Muffle tubes for protective atmosphere processes - Heat exchanger tubes for furnace cooling systems - Thermocouple protection tubes **Chemical & Petrochemical Processing:** - Ethylene cracking furnace tubes - Reformer furnace tubes - Process gas heater tubes - Catalyst carrier tubes - High-temperature reactor tubes **Power Generation:** - Superheater and reheater tubes - Heat recovery steam generator (HRSG) tubing - Boiler tubes for high-pressure steam - Gas turbine heat exchanger tubes - Nuclear reactor instrumentation tubes **Other Applications:** - Glass manufacturing furnace tubes - Semiconductor processing equipment - Aerospace heat exchanger components - Automotive exhaust system components --- #### **7. International Standards** | Standard Organization | Standard Designation | Description | |----------------------|---------------------|-------------| | **ASTM International** | ASTM B622 | Seamless Nickel Alloy Pipe and Tube | | **ASTM International** | ASTM B751 | Welded Nickel Alloy Tube | | **ASTM International** | ASTM B829 | Seamless and Welded Tubing | | **ASME** | SB-622 | Seamless Pipe and Tube (Pressure Vessel Code) | | **ASME** | SB-751 | Welded Tube | | **ISO** | ISO 1127 | Stainless Steel Tubes | | **DIN** | DIN 17456 | Seamless Circular Tubes | --- #### **8. Tube Specifications & Availability** **Manufacturing Methods:** - **Seamless Tube**: Hot extruded or cold drawn - **Welded Tube**: GTAW (TIG) or laser welded **Size Ranges:** - **OD Range**: 3 mm to 150 mm (0.125" to 6") - **Wall Thickness**: 0.5 mm to 12 mm (0.02" to 0.5") - **Lengths**: Standard 6-meter or cut-to-length **Tolerances:** - **OD Tolerance**: ±0.1 mm for precision tubes - **Wall Thickness**: ±10% standard, ±5% precision - **Straightness**: 1:1000 for precision applications **Surface Conditions:** - Pickled and cleaned - Bright annealed - Ground and polished - Special coatings available --- #### **9. Heat Treatment** **Standard Tube Heat Treatment:** - **Solution Annealing**: 1150–1180°C (2100–2150°F) for 1–2 hours, rapid cool - **Stress Relieving**: 850–900°C (1560–1650°F) for 2–4 hours **Special Considerations:** - Full heat treatment after cold drawing - Localized heat treatment for welded areas - Controlled cooling to prevent distortion --- #### **10. Fabrication & Installation** **Tube Bending & Forming:** - **Cold Bending**: Minimum bend radius 2 × OD - **Hot Bending**: 1050–1150°C (1920–2100°F) - **Mandrel Bending**: Recommended for thin-walled tubes - **Annealing**: Required after severe deformation **Welding Procedures:** - **Preferred Method**: GTAW (TIG) - **Filler Metal**: AWS A5.14 ERNiCr-3 - **Shielding Gas**: Argon or Argon-Helium mixtures - **Post-Weld Heat Treatment**: Solution annealing recommended **Quality Control:** - Eddy current testing per ASTM E309 - Hydrostatic pressure testing - Ultrasonic testing for wall thickness verification - Visual and dimensional inspection --- #### **11. Quality Assurance** **Testing & Certification:** - Hydrostatic testing to 1.5 × design pressure - Non-destructive examination reports - Chemical analysis certification - Mechanical test reports - Material traceability documentation **Special Requirements:** - **Cleanliness**: Specific cleanliness levels for critical applications - **Packaging**: Special packaging to prevent damage - **Documentation**: Full certification per EN 10204 3.1/3.2 - **Traceability**: Complete manufacturing history --- **Disclaimer:** This technical data is for informational purposes only. Properties may vary based on manufacturing process, heat treatment, and specific product form. For critical applications, consult current manufacturer technical data sheets and relevant industry standards. Always verify material certification and testing requirements for specific service conditions.

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 2083 gallon liquid totes Special package is available on request.