ASTM B167 UNS N06601 (Alloy 601) Seamless Pipe & Tube
ASTM B167 UNS N06601, commonly known as Alloy 601, is a high-temperature nickel-chromium alloy designed for exceptional oxidation resistance, thermal stability, and mechanical strength. This grade performs reliably in environments exceeding 1000°C, making it ideal for furnace equipment, petrochemical processing, aerospace heat-treat systems, and high-temperature corrosive applications. Its balanced composition enhances resistance to carburization, nitriding, and cyclic heating, ensuring reliable performance in demanding industrial operations.
Key Features
- Superior oxidation resistance up to very high temperatures
- Excellent mechanical strength and creep resistance
- Strong resistance to carburizing and nitriding atmospheres
- Stable metallurgical structure during long-term exposure
- Good corrosion resistance in both oxidizing and reducing media
- Suitable for welding, fabrication, and high-temperature forming
Equivalent Grades
| Standard | Grade |
|---|---|
| UNS | N06601 |
| WNR | 2.4851 |
| ISO | NiCr23Fe |
| EN | NiCr23Fe(2.4851) |
ASTM B167 UNS N06601 Chemical Composition
| Element | Content (%) |
|---|---|
| Nickel (Ni) | 58.0 – 63.0 |
| Chromium (Cr) | 21.0 – 25.0 |
| Iron (Fe) | Balance |
| Manganese (Mn) | ≤ 1.0 |
| Silicon (Si) | ≤ 0.5 |
| Copper (Cu) | ≤ 1.0 |
| Sulfur (S) | ≤ 0.015 |
| Carbon (C) | ≤ 0.10 |
| Aluminum (Al) | 1.0 – 1.7 |
UNS N06601 Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | 550 MPa min |
| Yield Strength (0.2% Offset) | 205 MPa min |
| Elongation | 30% min |
| Hardness | ≤ 85 HRB |
ASTM B167 Alloy 601 Physical Properties
| Property | Value |
|---|---|
| Density | 8.11 g/cm³ |
| Melting Range | 1360 – 1411°C |
| Electrical Resistivity | 1.08 µΩ·m |
| Thermal Conductivity | 14.8 W/m·K |
| Specific Heat | 0.46 J/g·K |
Type of ASTM B167 UNS N06601 Pipes
- ASTM B167 Alloy 601 Seamless Pipe
- ASTM B167 Alloy 601 Seamless Tube
- Hot Finished Pipe
- Cold Drawn Tube
- Annealed / Solution Treated Tubes
Application
- Industrial furnace and heat-treating equipment
- Petrochemical and refinery processing components
- Thermal oxidizers and incinerator systems
- Aerospace exhaust and high-temperature ducting
- Heat shields, combustors, and afterburner components
- Steam superheater and high-temp boiler parts
- Power generation high-temperature systems
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