Alloy 601，Inconel 601 Fittings，UNS N06601，EFORU

British Specs:，American Specs:AMS 5715 Bar and Forgings AMS 5870 Sheet, Strip and Plate ASTM B166 ASTM B167 ASTM B168 ASTM B751 ASTM B775 ASTM B829，German Specs:WS 2.4851

### **Alloy 601 / Inconel 601 Fittings / UNS N06601 – Nickel-Chromium-Iron-Aluminum Alloy Fittings** **Product Overview** Inconel 601 Fittings (UNS N06601) are precision-engineered pipe and tube connectors manufactured from nickel-chromium-iron-aluminum alloy, specifically designed for high-temperature applications requiring exceptional oxidation resistance and corrosion resistance. These fittings maintain excellent mechanical properties from room temperature up to 1250°C (2282°F) and offer superior performance in oxidizing, carburizing, and nitriding atmospheres. They are essential components in high-temperature piping systems requiring reliable performance in aggressive thermal and chemical environments. --- **Chemical Composition (ASTM B366 / ASTM B564)** | Element | Content (%) | |----------------|----------------| | **Nickel (Ni)** | 58.0–63.0 | | **Chromium (Cr)**| 21.0–25.0 | | **Iron (Fe)** | Balance | | **Aluminum (Al)**| 1.0–1.7 | | **Copper (Cu)** | 1.0 max | | **Manganese (Mn)**| 1.0 max | | **Carbon (C)** | 0.10 max | | **Silicon (Si)** | 0.50 max | | **Sulfur (S)** | 0.015 max | *The aluminum content enables formation of a protective aluminum oxide scale that provides exceptional resistance to high-temperature oxidation and carburization.* --- **Physical Properties** | Property | Value | |-------------------------------|---------------------------------| | **Density** | 8.11 g/cm³ (0.293 lb/in³) | | **Melting Range** | 1320–1370°C (2410–2500°F) | | **Electrical Resistivity** | 118 μΩ·cm (at 21°C) | | **Thermal Conductivity** | 11.2 W/m·K (at 100°C) | | **Mean Coefficient of Thermal Expansion** | 14.2 μm/m·°C (20–100°C) | | **Modulus of Elasticity** | 200 GPa (29,000 ksi) | | **Magnetic Permeability** | <1.005 (Essentially non-magnetic)| --- **Mechanical Properties (Fittings – Solution Annealed Condition)** | Property | Room Temperature | 800°C (1472°F) | 1000°C (1832°F) | |-----------------------------|------------------|----------------|-----------------| | **Tensile Strength** | 620–720 MPa | 170–210 MPa | 75–100 MPa | | **Yield Strength (0.2% Offset)** | 260–330 MPa | 110–140 MPa | 55–75 MPa | | **Elongation in 2"** | 40–55% | 35–50% | 45–65% | | **Hardness** | 75–90 HRB | 65–80 HRB | 55–70 HRB | | **Impact Strength (Charpy V-Notch)** | 70–100 J | 50–80 J | 30–60 J | --- **Fitting Types & Specifications** **Butt-Weld Fittings (ASME B16.9)** - **Elbows**: 45°, 90°, 180° (Long & Short Radius) - **Tees**: Equal and reducing - **Reducers**: Concentric and eccentric - **Caps**: All pressure ratings - **Stub Ends**: Lap joint style **Socket-Weld Fittings (ASME B16.11)** - **Elbows**: 45°, 90° - **Tees**: Straight and reducing - **Unions**: Standard and compact - **Couplings**: Half and full - **Plugs**: Square head and round head **Threaded Fittings** - **Nipples**: Close, shoulder, long - **Elbows**: 45°, 90° - **Tees**: Equal and reducing - **Couplings**: Full and half - **Bushings**: Hex and reducing **Flanges (ASME B16.5)** - **Slip-On**: Class 150 to 2500 - **Weld Neck**: Class 150 to 2500 - **Blind**: Class 150 to 2500 - **Socket Weld**: Class 150 to 2500 - **Lap Joint**: Class 150 to 1500 --- **Key Characteristics & Advantages** 1. **Exceptional High-Temperature Strength** – Maintains mechanical properties up to 1250°C (2282°F) 2. **Superior Oxidation Resistance** – Outstanding performance in oxidizing atmospheres 3. **Excellent Carburization Resistance** – Superior performance in carburizing environments 4. **Good Thermal Fatigue Resistance** – Withstands cyclic temperature variations 5. **Excellent Weldability** – Can be welded using standard procedures with matching filler metals 6. **Resistance to Sulfur Attack** – Performs well in sulfur-containing atmospheres 7. **Non-Magnetic Properties** – Suitable for specialized applications --- **Product Applications** **Heat Treatment Industry** - Furnace atmosphere systems - Retort and muffle connections - Heat treatment gas supply lines - Thermal processing exhaust systems - High-temperature fluid transfer systems **Chemical Processing** - High-temperature reactor systems - Process heater connections - Catalyst regeneration lines - Thermal oxidizer systems - High-temperature ducting systems **Power Generation** - Heat recovery steam generators - Waste heat boiler connections - Superheater and reheater systems - Combustion air preheater systems - Flue gas ducting systems **Aerospace & Defense** - Engine test stand piping - Afterburner fuel systems - Thermal protection systems - High-temperature hydraulic systems - Exhaust system components **Pollution Control** - Waste incineration systems - Thermal oxidizer piping - Flue gas treatment systems - Catalytic converter systems - Emission control ducting --- **International Standards** | Standard Type | Standard Number | Specification | |---------------|-----------------|---------------| | **UNS** | **N06601** | Unified Numbering System | | **ASTM** | B366 | Factory-Made Wrought Nickel Alloy Fittings | | **ASTM** | B564 | Nickel Alloy Forgings | | **ASME** | SB366 | Boiler and Pressure Vessel Code | | **ASME** | SB564 | Boiler and Pressure Vessel Code | | **MSS** | SP-97 | Integrally Reinforced Forged Branch Outlet Fittings | | **DIN** | 2.4851 | German Standard | | **EN** | NiCr23Fe | European Standard | --- **Manufacturing Processes** **Forging Methods** - **Closed-Die Forging**: High-precision complex geometries - **Open-Die Forging**: Custom shapes and large components - **Ring Rolling**: Circular components - **Press Forging**: Uniform deformation **Heat Treatment** - **Solution Annealing**: 1065–1175°C (1950–2150°F) - **Quenching**: Water or rapid air cool - **Stress Relieving**: 760–870°C (1400–1600°F) - **Final Heat Treatment**: Per ASTM B366 requirements **Quality Control** - **Chemical Analysis**: Verify composition - **Mechanical Testing**: Tensile and hardness - **Dimensional Inspection**: Per applicable standards - **Non-Destructive Examination**: As specified --- **Pressure-Temperature Ratings** **ASME B16.9/B16.11 Ratings** | Pressure Class | 100°F (38°C) | 500°F (260°C) | 800°F (427°C) | 1000°F (538°C) | |----------------|--------------|---------------|---------------|----------------| | **Class 150** | 275 psi | 230 psi | 180 psi | 150 psi | | **Class 300** | 720 psi | 600 psi | 470 psi | 390 psi | | **Class 600** | 1440 psi | 1200 psi | 940 psi | 780 psi | | **Class 900** | 2160 psi | 1800 psi | 1410 psi | 1170 psi | --- **Installation & Maintenance** **Welding Procedures** - **Welding Methods**: GTAW, GMAW, SMAW - **Filler Metals**: ENiCrFe-2, ENiCrFe-3 - **Shielding Gas**: Argon or argon-helium mixtures - **Preheating**: Not required - **Post-Weld Heat Treatment**: Solution annealing recommended **Installation Guidelines** - **Alignment**: Proper alignment before welding - **Support**: Adequate piping support - **Gaskets**: High-temperature graphite or ceramic fiber - **Bolting**: Matching or compatible high-temperature alloys - **Testing**: Hydrostatic or pneumatic testing **Maintenance Considerations** - **Inspection**: Regular visual examination - **Cleaning**: Compatible cleaning solutions - **Replacement**: Proper procedures for removal - **Documentation**: Maintain installation records --- **Quality Assurance & Testing** **Standard Testing** - Chemical analysis verification - Tensile testing at room temperature - Hardness testing - Hydrostatic testing - Dimensional verification **Non-Destructive Testing** - Liquid penetrant examination - Magnetic particle testing - Ultrasonic examination - Radiographic examination (for critical applications) **Certification Requirements** - Mill Test Certificates per EN 10204 3.1 - Chemical analysis certificates - Mechanical test reports - Heat treatment records - NDE reports as specified - Material traceability documentation --- **High-Temperature Performance** **Oxidation Resistance Data** - **Maximum Service Temperature**: 1250°C (2282°F) - **Cyclic Oxidation Life**: >1000 cycles at 1150°C - **Oxidation Rate**: <0.3 mm/year at 1100°C - **Scale Adherence**: Excellent, self-healing Al₂O₃ scale **Creep Properties** - **1000h Rupture Strength at 980°C**: 30 MPa (4.3 ksi) - **1000h Rupture Strength at 1095°C**: 10 MPa (1.4 ksi) - **Minimum Creep Rate**: Low even at elevated temperatures --- **Corrosion Resistance Performance** **Excellent Resistance To** - High-temperature oxidation - Carburizing atmospheres - Nitriding environments - Sulfur-containing gases - Molten salt corrosion **Good Resistance To** - Nitric acid vapors - Alkaline solutions - Organic acid environments - Atmospheric corrosion - Steam and condensate --- **Packaging & Handling** **Standard Packaging** - Individual plastic protection - Wooden crates or boxes - Weather-proof wrapping - Clear identification labeling **Marking Requirements** - Material grade (INCONEL 601) - Heat number - Size and schedule - Pressure rating - Manufacturer's identification **Storage & Handling** - Store in clean, dry conditions - Protect from mechanical damage - Keep original packaging until installation - Maintain proper segregation from other materials --- **Conclusion** Inconel 601 Fittings (UNS N06601) provide an exceptional combination of high-temperature strength, outstanding oxidation resistance, and reliable performance in high-temperature pressure systems. Their superior resistance to oxidation, carburization, and thermal cycling makes them ideal for heat treatment furnaces, chemical processing, power generation, and high-temperature piping systems. Available in various types, sizes, and pressure ratings with comprehensive international certification, Inconel 601 fittings offer engineers and designers a trusted solution for demanding high-temperature applications where reliability, safety, and long-term performance are essential requirements.

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 1736 gallon liquid totes Special package is available on request.