Alloy 230,Haynes 230 Tube,UNS N06230,E FORU

British Specs:，American Specs:AMS 5878 Sheet, Strip and Plate AMS 5891 Bar and Forgings，German Specs:DIN 17744 No 2.4733,NiCr22W14Mo

**Technical Data Sheet: Alloy 230 / Haynes 230 Tube / UNS N06230** **Nickel-Chromium-Tungsten-Molybdenum Superalloy Tubular Products** --- ### **1. Product Overview** Alloy 230 Tube (commercially known as **Haynes 230 Tube**, UNS N06230) represents the tubular form of this premium nickel-chromium-tungsten-molybdenum superalloy, designed for high-temperature applications requiring exceptional strength and environmental resistance. These tubes maintain excellent mechanical properties and oxidation resistance at temperatures up to **1200°C (2192°F)**, making them suitable for critical heat transfer, instrumentation, and structural applications in extreme environments. --- ### **2. Chemical Composition (Weight %)** | Element | Content (%) | Key Characteristics | |---------|-------------|---------------------| | Nickel (Ni) | Balance | Austenitic matrix formation | | Chromium (Cr) | 20.0-24.0 | Oxidation and corrosion resistance | | Tungsten (W) | 13.0-15.0 | Solid-solution strengthening | | Molybdenum (Mo) | 1.0-3.0 | Solid-solution strengthening | | Iron (Fe) | ≤3.0 | Residual element | | Cobalt (Co) | ≤5.0 | Residual element | | Manganese (Mn) | ≤0.50 | Hot workability | | Silicon (Si) | ≤0.40 | Residual element | | Aluminum (Al) | 0.20-0.50 | Oxidation resistance | | Carbon (C) | 0.05-0.15 | Carbide strengthening | | Lanthanum (La) | 0.005-0.050 | Oxide scale adhesion | | Boron (B) | 0.001-0.010 | Grain boundary strength | --- ### **3. Physical Properties** | Property | Value | |----------|-------| | Density | 8.97 g/cm³ (0.324 lb/in³) | | Melting Range | 1330-1380°C (2426-2516°F) | | Thermal Conductivity | 11.6 W/m·K at 100°C | | Coefficient of Thermal Expansion | 12.4 μm/m·°C (20-100°C) | | Electrical Resistivity | 1.24 μΩ·m at 25°C | | Magnetic Permeability | Essentially non-magnetic | --- ### **4. Mechanical Properties** **Room Temperature Properties (Annealed Condition):** - **Tensile Strength:** 795 MPa min (115 ksi min) - **Yield Strength (0.2% Offset):** 345 MPa min (50 ksi min) - **Elongation:** 40% min - **Hardness:** 85-100 HRB **Elevated Temperature Performance:** - **Stress Rupture Strength:** 55 MPa at 980°C for 100 hours - **Creep Strength:** 40 MPa at 1000°C for 1000 hours - **Maximum Service Temperature:** 1200°C continuous - **Excellent thermal stability** maintained --- ### **5. Product Specifications** **Tube Size Range:** - **Outside Diameter:** 3 mm to 100 mm (0.125" to 4") - **Wall Thickness:** 0.5 mm to 10 mm (0.020" to 0.375") - **Length:** Standard 3-7 meters, custom lengths available **Manufacturing Processes:** - **Seamless Tube:** ASTM B622 for high-pressure applications - **Welded Tube:** ASTM B626 for general service - **Surface Finish:** Pickled, bright annealed, or polished **Tolerance Standards:** - **OD Tolerance:** ±0.1 mm for precision tubes - **Wall Tolerance:** ±10% standard, ±5% special - **Straightness:** 1.5 mm/m maximum --- ### **6. Applications** **Heat Exchanger Applications:** - High-temperature heat exchanger tubes - Waste heat recovery systems - Process heater tubes - Nuclear steam generator tubes **Aerospace & Defense:** - Jet engine bleed air systems - Hydraulic line conduits - Fuel system components - Environmental control systems **Industrial Processing:** - Thermocouple protection sleeves - Radiation pyrometer tubes - Furnace radiant tubes - Chemical process tubing **Power Generation:** - Superheater and reheater tubes - Boiler tubes for advanced cycles - Gas turbine transition pieces - Heat recovery system components --- ### **7. International Standards** | Standard Type | Standard Number | Specification | |---------------|-----------------|---------------| | UNS | N06230 | Material designation | | ASTM | B622 | Seamless Pipe and Tube | | ASTM | B626 | Welded Tube | | ASME | SB-622 | Boiler and Pressure Vessel Code | | AMS | 5878 | Sheet, Strip, and Plate | | EN/DIN | 2.4733 | European designation | --- ### **8. Fabrication & Installation** **Tube Bending & Forming:** - **Minimum Bend Radius:** 2 × OD for thin walls - **Bending Temperature:** Cold bending preferred, hot bending at 1170°C - **Springback Allowance:** 10-15% typical - **Bending Methods:** Mandrel bending for tight radii **Joining Methods:** - **Welding:** GTAW with ERNiCrWMo-1 filler - **Tube Fittings:** Swage-type, compression, or brazed fittings - **Expansion Joints:** Suitable for tube-to-tubesheet joining **Heat Treatment:** - **Solution Annealing:** 1230°C ± 15°C - **Rapid Cooling:** Air or water quench - **Stress Relieving:** 870-900°C as required --- ### **9. Quality Assurance** **Standard Testing:** - Hydrostatic or pneumatic testing - Eddy current examination per ASTM E309 - Ultrasonic testing for wall thickness verification - Dimensional inspection per ASTM A450 **Special Testing Available:** - Flare testing for ductility verification - Flattening testing for weld quality - Grain size evaluation per ASTM E112 - High-temperature performance testing --- ### **10. Technical Advantages** - **Superior high-temperature strength** up to 1200°C - **Exceptional oxidation resistance** in cyclic conditions - **Excellent thermal fatigue resistance** - **Good resistance to thermal shock** - **Maintains structural integrity** under thermal stress - **Long service life** in aggressive environments --- ### **11. Corrosion Resistance Properties** - **Oxidation Resistance:** Excellent to 1200°C - **Carburization Resistance:** Good - **Nitridation Resistance:** Good - **Chloride Attack Resistance:** Good - **Sulfidation Resistance:** Moderate to 980°C --- **Note:** Haynes 230 Tube products offer exceptional performance for high-temperature applications where conventional materials cannot withstand the extreme operating conditions. The combination of high strength, excellent environmental resistance, and good fabricability makes these tubes suitable for the most demanding applications in aerospace, power generation, and industrial processing. Consult with our technical team for specific application recommendations and engineering support.

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 2252 gallon liquid totes Special package is available on request.