| Temperature Classification: | High Temperature Piping |
|---|---|
| MPa Classfication: | High Pressure Piping |
| Material: | Nickel Incoloy Monel |
| Cross-Section Shape: | Round |
| Connection Type: | Seamless |
| Transport Package: | Wooden Case |
| Customization: |
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Alloy 601 pipe is a nickel-based alloy. The outstanding feature of alloy 601 is high-temperature oxidation resistance. Alloy N06601 pipe has a very high chromium content (approximately 25%) with additions of aluminum designed to protect against high-temperature oxidizing atmospheres during heat treatment of the material. Because of its oxidation and corrosion resistance properties, alloy 601 pipe is suitable for use in extreme conditions where it is exposed to higher pressures and kinetic energy. Inconel alloy 601 forms a thick and stable passivating oxide layer that protects the surface from additional attack when heated. The high-temperature strength of Nickel alloy 601 is produced on the basis of the alloy through strong solid solution improvement or precipitation strengthening heat treatment process.
UNS N06601 Chemical Composition
| Ni | Nickel 58 - 63 |
| Cr | Chromium 21 - 25 |
| Al | Aluminum 1.0 - 1.7 |
| C | Carbon 0.10 max |
| Mn | Manganese 1.0 max |
| S | Sulfur 0.015 max |
| Si | Silicon 0.50 max |
| Cu | Copper 1.0 max |
| Fe | Iron Remainder |
Alloy 601 Pipe Mechanical Properties
| Mechanical Properties | Imperial | Metric |
| Tensile strength (solution annealed, room temperature) | 110000 psi | 760 MPa |
| Yield strength (solution annealed, room temperature) | 65300 psi | 450 MPa |
| Elongation at break | 42% | 42% |
Alloy 601 Pipe Heat Treatment
Alloy 601 pipe cannot be hardened by heat treatment, only cold working can improve room temperature strength. Inconel 601 seamless pipe is either annealed at around 2000°F or solution treated at around 2100°F followed by air cooling. Solution treatment, also known as annealing or homogenization, involves heating an alloy to a specific temperature to dissolve any precipitated phases or segregations in the material's microstructure. This helps achieve a uniform distribution of alloying elements and improves the mechanical properties of the alloy, especially at high temperatures.
Alloy 601 Welded Pipe Solution Treatment
1. Solution Treatment:
For Inconel 601, a typical solution treatment process involves heating the material to a temperature of approximately 2100°F (1150°C) to 2250°F (1230°C) and holding it at that temperature for a specified time. Exact temperatures and times may vary depending on specific requirements and desired properties.
2. Rapid cooling:
After the Inconel 601 UNS N06601 material has been held at the solution treatment temperature for the appropriate time, it is rapidly cooled. Rapid cooling helps prevent the re-precipitation of unwanted phases and maintains the desired microstructure for improved performance.
3. Age hardening (optional):
In some cases, after solution treatment and rapid cooling, ASME SB-167 N06601 pipe can be age hardened, which involves further heat treatment at lower temperatures to enhance its mechanical properties. Age hardening is commonly used to increase the strength of materials.
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