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Home > Copper Nickel > Copper Nickel Boiler Tubing
Copper Nickel Boiler Tubing is a unique type of alloy tubing crafted for optimal heat transfer and long-lasting performance in high-temperature, high-pressure boiler systems. Made from copper-nickel alloys like 90/10 and 70/30, this tubing boasts impressive resistance to corrosion, oxidation, and thermal stress. Its smooth inner surface minimizes scale buildup and enhances flow efficiency, making it a dependable choice for continuous boiler operations. People appreciate Copper Nickel Boiler Tubing for its durability, ease of fabrication, and consistent performance, which helps extend the lifespan of equipment while ensuring steady thermal efficiency in challenging industrial and marine boiler settings.
This tubing primarily consists of copper, with nickel as the key alloying element, usually in ratios of 90% copper to 10% nickel or 70% copper to 30% nickel. Small amounts of iron and manganese are added to boost mechanical strength and corrosion resistance. The alloy offers good tensile and yield strength, high ductility, and excellent thermal conductivity. It remains mechanically stable at high temperatures and resists stress corrosion cracking, making it well-suited for the thermal cycling and pressure changes typical in boiler applications.
| Boiler Tube Standard | ASTM B552 / ASME SB552 |
| Seamless Boiler Tube Sizes | 1 / 2″ NB – 16″ NB |
| Welded Boiler Tube Sizes | 1 / 2″ NB – 24″ NB |
| Boiler Tube Outside Diameter | 6.00 mm OD up to 914.4 mm OD, Sizes up to 24” NB available Ex-stock, OD Size Steel Boiler Tubes available Ex-stock |
| Boiler Tube Manufacturing Process | Seamless / Welded / ERW |
| Cupro Nickel Boiler Tube Schedule | SCH 5, SCH10, SCH 40, SCH 80, SCH 80S, SCH 160, SCH XXS, SCH XS |
| Boiler Tube Length | Single Random, Double Random, Standard & Cut length |
| Delivery Condition | Annealed and Pickled, Polished, Bright Annealed, Cold Drawn |
| Outside Finish | 2B, No.4, No.1, No.8 Mirror Finish for Cupro Nickel Boiler Tubes, Finish as per customer Requirements |
| Value Added Services | Cutting, Beveling, Polishing, Threading, Destructive, Non Destructive, Ultrasonic Testing |
| Properties | Imperial | Metric |
|---|---|---|
| Yield strength (depending on temper) | 40000-76000 psi | 276-524 MPa |
| Shear modulus | 6380 ksi | 44.0 GPa |
| Tensile strength | 38000-77000 psi | 262-531 MPa |
| Elongation at break (in 50.8 mm) | 46% | 46% |
| Poisson’s ratio | 0.34 | 0.34 |
| Elastic modulus | 17000 ksi | 117 GPa |
| Machinability (UNS C36000 (free-cutting brass) = 100) | 20 | 20 |
| Designation | Chemical Composition % | ||||||||
| Cu | Sn | Al | As | Ni | Fe | Mn | Pb max. | Zn | |
| C70400 | Rem | – | – | – | 4.8-6.2 | 1.3-1.7 | 0.3-0.8 | 0.05 | 1.0max |
| Property |
Metric Units |
Imperial Units |
|---|---|---|
|
Melting Point (Liquidus) |
11,500°C |
21,000°F |
|
Melting Point (Solidus) |
11,000°C |
20,100°F |
|
Density |
8.94 gm/cm³ @ 20°C |
0.323 lb/in³ @ 68°F |
|
Specific Gravity |
8.94 |
8.94 |
|
Coefficient of Thermal Expansion |
17.1 x 10 -6 / °C (20-300°C) |
9.5 x 10 -5 / °F (68-392°F) |
|
Themal Conductivity |
40 W/m. °K @ 20°C |
23 BTU/ft³/ft/hr/°F @ 68°F |
|
Thermal Capacity (Specific Heat) |
380 J/kg. °K @ 20°C |
0.09 BTU/lb/°F @ 68°F |
|
Electrical Conductivity (Annealed) |
5.26 microhm?¹.cm?¹ @ 20°C |
9.1% IACS |
|
Electrical Resistivity (Annealed) |
0.190 microhm.cm @ 20°C |
130 ohms (circ mil/ft) @ 68°F |
|
Modulus of Elasticity (tension) |
140 GPa @ 20°C |
20 x 10 6 psi @ 68°F |
|
Modulus of Rigidity (torsion) |
52 GPa @ 20°C |
7.5 x 10 6 psi @ 68°F |
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Choosing Copper Nickel Boiler Tubing from Samia Pipes and Tubes ensures outstanding corrosion resistance, high strength, and durability. Our Tube is designed for diverse industrial applications, delivering reliability and performance in challenging environments while maintaining competitive pricing.
Choose Copper Nickel Boiler Tubing from Samia Pipes and Tubes for its superior seawater corrosion resistance, biofouling protection, and excellent thermal conductivity, making it ideal for marine, industrial, and coastal applications requiring long-lasting performance and reliability.
Yes, we offer custom sizes for Copper Nickel Boiler Tubing to meet your specific requirements. Our team at Samia Pipes and Tubes is committed to providing tailored solutions for all your Piping & tubing needs. For more details, contact us at sales@samiapipes.com.
Copper Nickel Boiler Tubing finds its place in marine boilers, power plant boilers, and industrial steam generation systems. It’s often used in superheaters, economizers, condensers, and heat recovery units where efficient heat transfer is essential. The tubing excels in seawater and brackish water environments, making it perfect for marine and coastal applications. Its resistance to fouling and corrosion helps cut down on maintenance time and costs, ensuring safe, efficient, and long-term operation in demanding boiler and heat exchange systems.
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