Alloy 601，Inconel 601 Pipe，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 Pipe / UNS N06601 – Nickel-Chromium-Iron-Aluminum Alloy Pipe** **Product Overview** Inconel 601 Pipe (UNS N06601) is a nickel-chromium-iron-aluminum alloy piping product specifically engineered for high-temperature applications requiring exceptional oxidation resistance and structural integrity. This pipe maintains excellent mechanical properties and corrosion resistance at temperatures up to 1250°C (2282°F), making it ideal for furnace applications, heat treatment equipment, and high-temperature processing systems. The aluminum content enables formation of a protective oxide scale that ensures long-term performance in aggressive high-temperature environments. --- **Chemical Composition (ASTM B167 / ASTM B517)** | 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 addition promotes formation of a continuous, adherent aluminum oxide scale that provides exceptional protection against 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 (Pipe – 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 | | **Burst Pressure** | Excellent | Good | Fair | **Pressure-Temperature Ratings** - **Schedule 5S**: 120 psi at 1000°C (1832°F) - **Schedule 10S**: 250 psi at 1000°C (1832°F) - **Schedule 40**: 500 psi at 1000°C (1832°F) --- **Pipe Specifications & Available Forms** **Pipe Types** - Seamless pipe (ASTM B167) - Welded pipe (ASTM B517) - Heat exchanger tubes - Radiant tubes - Instrumentation piping **Size Ranges** - **Nominal Pipe Size**: 1/8" to 24" NPS - **Wall Thickness**: Schedule 5S to XXS - **Length**: Random (18–24 feet), double random, cut to length **Standard Specifications** - **Seamless Pipe**: ASTM B167, ASME SB167 - **Welded Pipe**: ASTM B517, ASME SB517 - **Dimensions**: ASME B36.19M, ASME B36.10M --- **Key Characteristics & Advantages** 1. **Exceptional Oxidation Resistance** – Withstands temperatures up to 1250°C (2282°F) in oxidizing atmospheres 2. **High-Temperature Strength** – Maintains mechanical properties at elevated temperatures 3. **Excellent Carburization Resistance** – Superior performance in carburizing environments 4. **Good Thermal Fatigue Resistance** – Withstands cyclic temperature variations 5. **Excellent Fabricability** – Can be welded, bent, and formed using standard techniques 6. **Resistance to Sulfur Attack** – Performs well in sulfur-containing atmospheres 7. **Good Cyclic Oxidation Resistance** – Maintains integrity under thermal cycling conditions --- **Product Applications** **Heat Treatment Industry** - Radiant tubes for furnace applications - Retort and muffle systems - Heat treatment atmosphere piping - Annealing line components - Carburizing furnace piping **Chemical Processing** - High-temperature reactor piping - Process heater tubes - Catalyst regeneration lines - Thermal oxidizer systems - High-temperature ducting **Power Generation** - Heat recovery steam generators - Waste heat boiler tubes - Superheater and reheater components - Combustion air preheater tubes - Flue gas ducting systems **Aerospace & Defense** - Engine test stand piping - Afterburner fuel lines - Thermal protection systems - High-temperature hydraulic lines - Exhaust system components **Pollution Control** - Waste incineration systems - Thermal oxidizer piping - Flue gas treatment systems - Catalytic converter housings - Emission control ducting --- **International Standards** | Standard Type | Standard Number | Specification | |---------------|-----------------|---------------| | **UNS** | **N06601** | Unified Numbering System | | **ASTM** | B167 | Nickel-Chromium-Iron Alloy Seamless Pipe and Tube | | **ASTM** | B517 | Welded Nickel-Chromium-Iron Alloy Pipe | | **ASME** | SB167 | Boiler and Pressure Vessel Code | | **ASME** | SB517 | Boiler and Pressure Vessel Code | | **DIN** | 2.4851 | German Standard | | **EN** | NiCr23Fe | European Standard | --- **Fabrication & Installation** **Welding Procedures** - **Preferred Methods**: GTAW (TIG), GMAW (MIG) - **Filler Metals**: ENiCrFe-2, ENiCrFe-3 - **Shielding Gas**: Argon or argon-helium mixtures - **Preheating**: Not required - **Post-Weld Heat Treatment**: Solution annealing recommended **Bending & Forming** - **Cold Bending**: Minimum bend radius 3x OD - **Hot Bending**: 1150–1230°C (2100–2250°F) - **Tube Expansion**: Good capability for roller expansion - **Flaring**: Standard 37° flare connections **Installation Guidelines** - **Support Spacing**: Standard spacing with high-temperature supports - **Thermal Expansion**: 14.2 μm/m·°C (20–100°C) - **Gasket Materials**: High-temperature graphite or ceramic fiber - **Bolt Materials**: Matching or compatible high-temperature alloys --- **Heat Treatment** **Solution Annealing** - **Temperature**: 1065–1175°C (1950–2150°F) - **Time**: 30 minutes minimum - **Cooling**: Rapid air cool or water quench - **Atmosphere**: Controlled atmosphere for scale-free surfaces **Stress Relieving** - **Temperature**: 760–870°C (1400–1600°F) - **Time**: 1 hour per inch of thickness - **Cooling**: Air cool to room temperature --- **Quality Assurance & Testing** **Standard Testing** - Chemical analysis verification - Tensile testing at room temperature - Hardness testing - Flattening test - Flaring test - Hydrostatic or pneumatic testing **Non-Destructive Testing** - Ultrasonic testing per ASTM A450 - Eddy current testing - Liquid penetrant examination - Radiographic examination (welded pipe) **Certification Requirements** - Mill Test Certificates per EN 10204 3.1 - Chemical analysis certificates - Mechanical test reports - Hydrostatic test reports - NDE reports as specified --- **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 --- **Pressure-Temperature Ratings** **ASME B31.3 Ratings (Example)** - **500°F (260°C)**: 1350 psi (Schedule 40) - **800°F (427°C)**: 980 psi (Schedule 40) - **1000°F (538°C)**: 780 psi (Schedule 40) - **1200°F (649°C)**: 560 psi (Schedule 40) --- **Packaging & Handling** **Standard Packaging** - Plastic end caps for protection - Wooden crates or steel bundles - Weather-proof wrapping - Clear identification labeling **Storage & Handling** - Store in clean, dry conditions - Protect from mechanical damage - Keep original packaging until installation - Use proper lifting equipment --- **Conclusion** Inconel 601 Pipe (UNS N06601) provides an exceptional combination of high-temperature strength, outstanding oxidation resistance, and reliable performance in high-temperature pressure applications. Its superior resistance to oxidation, carburization, and thermal cycling makes it ideal for heat treatment furnaces, chemical processing, power generation, and high-temperature piping systems. Available in both seamless and welded forms with comprehensive international certification, Inconel 601 pipe offers 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 1731 gallon liquid totes Special package is available on request.