Alloy 601 Seamless Pipe

Product Description

 

Product Description

 

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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.

 

Inconel alloy 601 pipe standard: 

• ASTM B167: specification covers nickel-chromium-iron alloys (UNS N06600, N06601, N06603, N06690, N06693, N06025, N06045, and N06696) in cold-worked annealed, hot-worked annealed, and hot-finished seamless pipe and tube

 

• ASTM B474: Standard Specification for Electric Fusion Welded Nickel and Nickel Alloy Pipe

 

• ASTM B163: Standard Specification for Seamless Nickel and Nickel Alloy Condenser and Heat-Exchanger Tubes

 

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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