Alloy 333,RA-33 Fittings,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® Fittings (UNS N06333)** --- ### **Overview** Alloy 333 Fittings (UNS N06333), commercially known as **RA-333®**, are precision-engineered components manufactured from nickel-chromium-iron superalloy for high-temperature piping systems. These fittings maintain exceptional strength and corrosion resistance in severe thermal environments up to **1200°C (2200°F)**, offering reliable performance in oxidizing, carburizing, and sulfidizing atmospheres. --- ### **Chemical Composition (Weight %)** | Element | Content (%) | Role | |---------|-------------|------| | Nickel (Ni) | 44.0-48.0 | Austenitic matrix foundation | | 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 (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 **Pressure-Temperature Ratings:** - **Max Working Pressure at 20°C**: 210 bar (3000 psi) - **Max Working Pressure at 540°C**: 140 bar (2000 psi) - **Max Working Pressure at 815°C**: 70 bar (1000 psi) --- ### **Types of Fittings Available** **Butt-Weld Fittings:** - Elbows: 45°, 90°, 180° - Tees: Equal and reducing - Reducers: Concentric and eccentric - Caps and stub ends **Socket-Weld Fittings:** - Socket elbows: 45°, 90° - Socket tees - Socket unions - Couplings and plugs **Threaded Fittings:** - NPT threaded components - BSP threaded options available **Special Fittings:** - Crosses and laterals - Nipples and bushings - Custom-designed components --- ### **Product Applications** **Industrial Furnace Systems:** - Radiant tube connections - Heat treatment furnace piping - Carburizing atmosphere systems - Annealing furnace components **Chemical & Petrochemical Processing:** - High-temperature reactor systems - Catalyst regeneration lines - Reform furnace piping - Pyrolysis gas systems **Power Generation:** - Heat recovery steam generators - Gas turbine exhaust systems - Boiler feed systems - High-temperature steam lines **Aerospace & Defense:** - Test cell exhaust systems - Engine test stand piping - High-temperature hydraulic systems **Other Applications:** - Glass manufacturing furnace systems - Ceramic kiln atmosphere piping - Waste incineration systems - Thermal fluid systems --- ### **Fabrication Characteristics** **Machining:** - Good machinability rating - Use positive rake angles and sharp tools - Recommended cutting speeds: 10-20 m/min - Use heavy, continuous feeds - Sulfur-free cutting fluids recommended **Welding:** - Excellent weldability - GTAW (TIG) process preferred - Use matching filler metals (ERNiCrMo-XX) - Pre-heat generally not required - Post-weld heat treatment optional **Quality Control:** - Dimensional verification - Pressure testing certification - Material traceability - Surface finish inspection --- ### **International Standards** | Standard Organization | Standard Number | Description | |----------------------|-----------------|-------------| | **ASTM** | B366 | Factory-Made Wrought Nickel Alloy Fittings | | **ASME** | B16.9 | Steel Butt-Welding Fittings | | **ASME** | B16.11 | Socket-Welded and Threaded Fittings | | **ASME** | SB-366 | Code-approved nickel alloy fittings | | **MSS** | SP-43 | Wrought Stainless Steel Fittings | | **UNS** | N06333 | Unified Numbering System | | **DIN** | 2.4608 | Material Number 2.4608 | --- ### **Quality Assurance** - Hydrostatic testing certification - Dimensional verification per ASME B16.9 - Chemical composition certification - Mechanical property testing - Heat treatment certification - Non-destructive testing available - 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 and sulfidation resistance** 4. **Good thermal fatigue resistance** under cyclic conditions 5. **Reliable performance** in aggressive industrial atmospheres --- **Notes:** - "RA-333" is a registered trademark of Rolled Alloys - All fittings supplied with material certification - Custom designs and special configurations available - Consult technical experts for specific application requirements *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 2919 gallon liquid totes Special package is available on request.