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ASTM B622 UNS N10276 Tube|ASTM B622 C276 Tube

ASTM B622 is a specification standard developed by ASTM International that covers seamless nickel-chromium-iron-molybdenum-copper alloy C276 (UNS N10276) tubes.

Description

ASTM B622 is a specification standard developed by ASTM International that covers seamless nickel-chromium-iron-molybdenum-copper alloy (UNS N10276) tubes. UNS N10276 is a high-performance, corrosion-resistant nickel-molybdenum-chromium alloy known as Hastelloy C276. This alloy is widely used in various industries, particularly in environments where corrosion resistance is critical.

1. ASTM B622 C276 Tube Composition:

- Nickel (Ni): Balances the alloy and provides exceptional corrosion resistance.

- Chromium (Cr): Enhances corrosion resistance and oxidation resistance.

- Molybdenum (Mo): Contributes to resistance against pitting and crevice corrosion.

- Columbium (Nb): Improves stability and resistance to sensitization.

- Nickel (Ni): Balancing element

- Chromium (Cr): 14.5-16.5%

- Molybdenum (Mo): 15-17%

- Iron (Fe): 4-7%

- Tungsten (W): 3-4.5%

- Cobalt (Co): 2.5% max

- Manganese (Mn): 1% max

- Vanadium (V): 0.35% max

- Sulfur (S): 0.03% max

- Carbon (C): 0.01% max

- Silicon (Si): 0.08% max

- Phosphorus (P): 0.04% max

2. ASTM B622 C276 Tube Mechanical Properties:

- Tensile Strength: Minimum of 100 ksi (690 MPa).

- Yield Strength: Minimum of 41 ksi (283 MPa).

- Elongation: Minimum of 40%.

3. ASTM B622 C276 Tube Form:

- Seamless tubes: Produced without longitudinal welds, ensuring reliability in high-pressure and corrosive environments.

4. ASTM B622 C276 Tube Dimensions and Tolerances:

- Dimensions: The standard covers tubes with outside diameters ranging from 0.125 inches (3.18 mm) to 2.5 inches (63.5 mm) and wall thicknesses from 0.015 inches (0.41 mm) to 0.135 inches (3.43 mm).

- Lengths: Tubes can be supplied in lengths up to 42 feet.

- Adheres to ASTM B622 specifications for outer diameter, wall thickness, and length with defined tolerances.

5. ASTM B622 C276 Tube Heat Treatment:

- Guidelines provided for heat treatment to achieve desired mechanical and corrosion-resistant properties.

- Tubes are typically supplied in the solution-annealed condition.

6. ASTM B622 C276 Tube Testing and Inspection:

- Undergoes various tests such as hydrostatic, tension, and hardness tests to ensure quality and reliability.

- The tubes undergo various tests such as hydrostatic or nondestructive electric tests, and they must conform to the specified mechanical properties.

7. ASTM B622 C276 Tube Surface Finish:

- Specifies allowable surface conditions, meeting visual and quality criteria.

8. ASTM B622 C276 Tube Application:

- Suited for diverse industries, including chemical processing, petrochemical, pollution control, and power generation where corrosion resistance and high-strength characteristics are paramount.

9. Advantages of ASTM B622 C276/UNS N10276 Tube:

- Excellent corrosion resistance in a wide range of aggressive environments.

- Versatility for use in applications with high temperatures, strong acids, and harsh chemical environments.

- Reliable performance in challenging industrial conditions.

10. ASTM B622 C276 Tube Common Uses:

- ASTM B622 C276/UNS N10276 tubes are used in a wide range of applications, including chemical processing, pollution control, pulp and paper production, waste treatment, and pharmaceutical manufacturing.

- Its exceptional corrosion resistance makes it suitable for use in harsh environments where other materials may corrode or fail.

- Chemical processing equipment.

- Petrochemical industry applications.

- Pollution control systems.

- Power generation equipment.

11. ASTM B622 C276 Tube Physical Properties:

- Density: 8.89 g/cm³

- Melting Range: 1325-1370°C

12. ASTM B622 C276 Tube Compliance:

- Meets ASTM B622 standards, ensuring consistent quality and performance.

Utilizing ASTM B622 C276/UNS N10276 tubes provides a reliable solution for applications requiring robust corrosion resistance and mechanical strength in challenging environments. Always refer to the specific product documentation and standards for precise details and recommendations.