Products Description
Product Specifications
| Standards | ASTM B171/B171M |
| Steel Grades | C70600 C36500 C44300 C4440D C44500 C46400 C46500 C61300 C61400 C63000 C63200 C70620 C71500 C71520 C72200 |
| Equivalent Standards |
ASTM B111,ASTM B466 |
| Outer Diameter (OD) | 6 mm - 630 mm |
| Wall Thickness (WT) | 0.5 mm - 55 mm |
| Length | up to 18m |
| Surface Treatment | Bright, polished, pickled or as supplied |
| Production Process | Cold drawn / Cold Rolled |
| Condition |
SB171 C70600 copper nickel tube offers high thermal conductivity-approximately 40–45 W/(m·K), compared to only about 15 W/(m·K) for 304 stainless steel. With the same heat-exchange surface area, condensers equipped with C70600 tube bundles achieve lower terminal temperature differences and higher vacuum levels, directly improving the unit's thermal efficiency.
Specifically designed for circulating water and seawater cooling applications in power generation, C70600 copper-nickel tubes resist corrosion from chloride ions and sulfides, with a seawater corrosion rate of ≤0.02 mm/year. They also resist marine biofouling, reducing scaling and clogging and making them ideal for long-term, continuous operation of power generation units.
Customized Services
- TORICH supports the customization of U-shaped heat exchanger tubes; bending operations are performed according to condenser tube bundle layout drawings, with precise control over bending radius tolerances and ovality.
- Capabilities include tube bending, flaring, swaging, end beveling, welded fabrication, and custom matching fittings (elbows, tees, flanges).
- Services include internal and external mirror polishing, precision degreasing, pickling and passivation, and anti-oxidation coating treatments.
Chemical Composition
| Element | Cu | Ni + Co | Fe | Mn | Zn | Pb |
|---|---|---|---|---|---|---|
| C70600 | Remainder, 88.6% min* | 9.0–11.0% | 1.0–1.8% | 1.0% max | 1.0% max | 0.05% max |
Mechanical Properties
| Property | Tensile Strength | Yield Strength | Elongation | Hardness |
|---|---|---|---|---|
| C70600 – Annealed (O61) | 303 MPa (44 ksi) typ | 110 MPa (16 ksi) typ. | 42% typ. | HRB 65 typ. |
| C70600 – Light Drawn (H55) | 310 MPa (45 ksi) min | - | 10% typ. | HRB 72 typ. |
Possible Alternative Grades
- C71500 (70/30 copper-nickel alloy) is a high-end, upgraded alternative to C70600; it offers superior corrosion resistance, high-temperature stability, and compressive strength, making it suitable for the extreme corrosive conditions-characterized by high salinity, high temperatures, and high pressures-found in nuclear and large-scale thermal power plants.
- C70400 (95/5 copper-nickel alloy) is more cost-effective than C70600 but is suitable only for conventional power generation applications involving freshwater cooling, low-corrosion environments, and low-pressure systems.
- C70250 copper-nickel alloy is a high-strength alternative material characterized by exceptional strength and good elasticity; it is suitable for precision heat exchange components in power generation equipment and for small-diameter, high-pressure piping systems.
application areas
- Steam turbine surface condensers
- Seawater-cooled condensers
- Main condenser cooling systems
- Auxiliary condensers
- Feedwater heat exchangers
- Generator coolers
- Turbine oil coolers
Products Show
Testing Equipment
Factory Equipment
Pickling equipment
Polishing equipment
Cold drawing equipment
Products Package
FAQ
Q: What are the maximum temperature and pressure ratings for C70600 copper-nickel tubing?
A: The standard operating temperature range is -40°C to 350°C. Standard tubing can withstand a working pressure of 1.6 MPa, while customized heavy-wall tubing can handle higher pressures, meeting the operational requirements of various generator sets.
Q: Are C70600 tubes prone to scaling, corrosion, or leakage during power generation operations?
A: C70600 copper-nickel tubing offers excellent resistance to scaling, biofouling, and acid/alkali corrosion. Under normal operating conditions, scaling and rusting are minimal; provided the medium parameters remain within specifications, the piping maintains long-term unobstructed flow and remains leak-free.
Q: Can C70600 tubing be used in seawater once-through cooling systems?
A: Yes. C70600 is a classic material choice for condensers using once-through seawater cooling; it exhibits a low corrosion rate in clean seawater and resists marine biofouling. However, flow velocity must be controlled within the 1.2–2.4 m/s range, as excessive velocity can accelerate erosion-corrosion.
Hot Tags: sb171 c70600 copper nickel tube, China, suppliers, manufacturers, factory, customized, wholesale, price, OEM, mill, producer, for sale, C71500 alloy pipe
