Alloy 333,RA-33 Tube,UNS N06333,E FORU

British Specs:，American Specs: AMS 5717 Bar and Forgings AMS 5593 Sheet, Strip and Plate，German Specs:

**Technical Datasheet: Alloy 333 / RA-333® Tube (UNS N06333)** --- ### **Overview** Alloy 333 (UNS N06333), commercially known as **RA-333®**, is a nickel-chromium-iron superalloy with additions of molybdenum and tungsten, specifically designed for extreme high-temperature service. The tubular form of this alloy offers exceptional resistance to oxidation, carburization, and thermal cycling, making it ideal for high-temperature heat exchangers, furnace components, and chemical processing equipment operating up to **1200°C (2200°F)**. --- ### **Chemical Composition (Weight %)** | Element | Content (%) | Role | |---------|-------------|------| | Nickel (Ni) | 44.0 min | Base element, provides austenitic structure | | Chromium (Cr) | 24.0-27.0 | Oxidation & sulfidation resistance | | Iron (Fe) | 15.0-20.0 | Solid solution strengthening | | Molybdenum (Mo) | 2.5-4.0 | Resistance to reducing environments | | Tungsten (W) | 2.0-4.0 | High-temperature strength | | Cobalt (Co) | 2.0-4.0 | Solid solution strengthening | | Silicon (Si) | 0.5-1.0 | Oxidation resistance | | Manganese (Mn) | 1.0-2.0 | Hot workability | | Carbon (C) | 0.05-0.10 | High-temperature strength | | Aluminum (Al) | 0.5 max | Deoxidizer | | Titanium (Ti) | 0.5 max | Stabilizer | --- ### **Physical Properties** | Property | Value | |----------|-------| | Density | 8.57 g/cm³ (0.309 lb/in³) | | Melting Range | 1370-1425°C (2500-2600°F) | | Thermal Conductivity | 12.5 W/m·K (at 20°C) | | Coefficient of Thermal Expansion | 14.2 μm/m·°C (20-100°C) | | Specific Heat Capacity | 460 J/kg·K | | Electrical Resistivity | 1.18 μΩ·m | | Modulus of Elasticity | 211 GPa (30.6 × 10⁶ psi) | | Magnetic Permeability | <1.005 (essentially non-magnetic) | --- ### **Mechanical Properties** **Room Temperature (Annealed Condition):** - **Tensile Strength**: 690-760 MPa (100-110 ksi) - **Yield Strength (0.2% Offset)**: 310-380 MPa (45-55 ksi) - **Elongation**: 40-50% - **Hardness**: HRB 85-95 **Elevated Temperature Performance:** - **815°C (1500°F) Tensile Strength**: 275 MPa (40 ksi) - **815°C (1500°F) Yield Strength**: 205 MPa (30 ksi) - **Creep Rupture Strength**: Excellent long-term performance - **Stress Rupture Life**: Superior to most austenitic alloys --- ### **Product Applications** **Heat Exchanger Applications:** - High-temperature heat exchanger tubes - Waste heat recovery systems - Recuperator and regenerator tubes - Boiler and superheater tubes **Industrial Furnace Systems:** - Radiant tubes - Muffle tubes - Retort furnaces - Annealing furnace components - Carburizing atmosphere tubing **Chemical Processing:** - Reactor tubing - Catalyst support tubes - Pyrolysis furnace tubes - High-temperature transfer lines **Power Generation:** - Gas turbine heat exchangers - HRSG (Heat Recovery Steam Generator) tubes - Boiler components - Exhaust system tubing **Other Applications:** - Thermocouple protection tubes - Instrumentation tubing - Laboratory furnace components --- ### **Fabrication Characteristics** **Welding Performance:** - Excellent weldability using GTAW (TIG) process - Suitable for GMAW (MIG) and SMAW processes - Recommended filler metal: ERNiCrMo-3 or equivalent - Preheating generally not required - Post-weld heat treatment optional **Forming and Bending:** - Good cold and hot forming characteristics - Hot working temperature: 1050-1200°C (1920-2190°F) - Minimum bend radius: 2 × tube diameter - Suitable for bending, flaring, and flanging operations **Machining:** - Machinability rating: Similar to Type 304 stainless steel - Use positive rake angles and sharp tools - Recommended cutting speeds: 10-20 m/min (30-65 SFM) - Use heavy, continuous feeds - Sulfur-free cutting fluids recommended --- ### **International Standards** | Standard Organization | Standard Number | Description | |----------------------|-----------------|-------------| | **ASTM** | B622 | Standard Specification for Seamless Nickel and Nickel-Alloy Tube | | **ASTM** | B626 | Standard Specification for Welded Nickel and Nickel-Alloy Tube | | **ASTM** | B751 | General Requirements for Nickel-Alloy Tube | | **ASME** | SB-622 | Code-approved seamless tube | | **ASME** | SB-626 | Code-approved welded tube | | **UNS** | N06333 | Unified Numbering System | | **DIN** | 2.4608 | Material Number 2.4608 | | **ISO** | 6207 | Nickel alloy tubes for general purposes | --- ### **Tube Specifications** **Available Sizes:** - **Outside Diameter**: 6 mm to 100 mm (0.25" to 4") - **Wall Thickness**: 0.5 mm to 6.0 mm (0.020" to 0.250") - **Lengths**: Standard and custom lengths available **Manufacturing Methods:** - **Seamless**: Cold drawn, pilgered - **Welded**: GTAW welded, cold worked - **Surface Finish**: Annealed and pickled, bright annealed **Tolerance Standards:** - Dimensional tolerances per ASTM B751 - Straightness: 1.5 mm per meter maximum - Ovality: Within standard dimensional tolerances --- ### **Quality Assurance** - Hydrostatic testing per ASTM standards - Eddy current or ultrasonic examination - Dimensional verification - Chemical analysis certification - Mechanical property testing - Heat treatment certification - EN 10204 3.1/3.2 certification available --- ### **Key Advantages** 1. **Exceptional high-temperature strength** up to 1200°C (2200°F) 2. **Superior oxidation resistance** in continuous service 3. **Excellent carburization resistance** in carburizing atmospheres 4. **Good thermal fatigue resistance** under cyclic conditions 5. **Outstanding fabricability** for complex tubular assemblies --- **Notes:** - "RA-333" is a registered trademark of Rolled Alloys - Proper design considerations for thermal expansion are essential - Consult technical experts for specific application requirements - Properties may vary based on manufacturing process and heat treatment *For detailed technical assistance and application engineering support, contact materials engineering specialists.*

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 2915 gallon liquid totes Special package is available on request.