ASTM SB163 UNS N02200 Pipes for cooling systems in power plants
ASTM SB163 UNS NO2200 pipe, also known as Nickel 200, is used in power plant cooling systems due to its excellent corrosion resistance, high thermal conductivity, and durability, particularly in corrosive or high-purity environments. Key considerations include the material's high cost, its temperature limitation to below 600°F (315°C) to prevent graphitization, and its excellent performance in heat exchangers and condensers.
What is the difference between Nickel 200 and Nickel 201?
Both Nickel 200 and 201 are commercially pure wrought nickel alloys with excellent corrosion resistance and electrical conductivity, but the primary difference lies in their carbon content, which makes 201 more suitable for high-temperature applications. Nickel 200 has a maximum carbon content of 0.15%, so it can only be used below 600°F (315°C) to avoid embrittlement caused by graphitization. Nickel 201 has a lower carbon content (maximum 0.02%), making it more suitable for use above 600°F (315°C).
Chemical Equation of Nickel Alloy 200 Tubes
| Nickel 200 | Ni | C | Mo | Mn | Si | Fe | P | S | Cu | Cr |
| 99.0 min | 0.15 max | – | 0.35 max | 0.1 max | 0.4 max | – | 0.01 max | 0.25 max | – |
Mechanical Strength Table of UNS N02200 Tube
| Density | Melting Point | Yield Strength (0.2%Offset) | Tensile Strength | Elongation |
| 8.9 g/cm3 | 1446 °C (2635 °F) | Psi - 21500 , MPa - 148 | Psi - 67000 , MPa - 462 | 45 % |
Equivalent of 200 Nickel Seamless Tube
| STANDARD | UNS | WERKSTOFF NR. | AFNOR | EN | JIS | BS | GOST |
| Nickel 200 | N02200 | 2.4066 | N-100M | Ni 99.2 | NW 2200 | NA 11 | ---2 |
Important Limitations and Considerations
Temperature Limitations: Its operating temperature is typically below 600°F (315°C). At higher temperatures, the material may graphitize, severely affecting its performance.
Cost: As a high-purity nickel alloy, it may be more expensive than standard carbon steel pipe, but its long-term performance and reliability in specific applications justify the cost.
Fabrication: While it can be welded and fabricated, understanding its properties is essential for proper construction.
Typical Applications in Power Plants
Condensers: Its high thermal efficiency is essential for efficient steam cooling.
Heat Exchangers: Facilitates heat transfer between dissimilar fluids.
High-Purity Fluid Handling: Used when fluid purity must be maintained.
Related Standards and Specifications
ASTM B163: This standard covers seamless nickel and nickel alloy condenser and heat exchanger tubing.
UNS N02200: This is the designation for Nickel 200, a commercially pure wrought nickel alloy.
Gnee Steel specializes in the production and sale of various nickel-based alloys, including Nickel 201, Nickel 202, Hastelloy C-276, Hastelloy C-22, Hastelloy B, Hastelloy C-4, Inconel Alloy 600, Inconel 625, Inconel 718, Inconel X-750, Incoloy Alloy 800, Incoloy 800H/HT, Incoloy 825, Monel Alloy 400, Monel K500, and high-temperature alloys. Gnee Steel's products are widely used in aerospace, chemical, electric power, automotive, and nuclear energy applications, and we can provide customized alloy solutions tailored to customer needs. For alloy pricing inquiries or customized alloy solutions, please contact us for a quote at ss@gneemetal.com.
