1. Seawater Corrosion Resistance
- The 1.0%–1.8% iron content in C70600 is a key factor in its resistance to seawater corrosion. Our pipes undergo strict chemical composition control to ensure their alloy composition meets ASTM B111 standards.
- The C70600 tube surface undergoes pickling, passivation, and mechanical polishing, resulting in a smooth surface that is less prone to scaling and improves its resistance to biofouling, making it particularly suitable for heat exchangers, condensers, and seawater cooling systems.
2. High Heat Transfer Efficiency
- The thermal conductivity of C70600 alloy is approximately 29 W/m·K, making its heat transfer efficiency three times that of stainless steel and twice that of titanium alloys. Therefore, high heat transfer efficiency can be achieved with a smaller heat exchange surface area, making it suitable for compact heat exchanger designs.
- The C70600 tube undergoes a precision drawing process, resulting in uniform wall thickness and strict dimensional tolerances. Each batch undergoes 100% dimensional inspection to ensure compliance with ASTM B111 standards.
3. Excellent Machining Performance
- Our tubing is supplied in the annealed state (O60 soft state), offering excellent ductility and formability, allowing for cold bending, coiling, and folding without significant breakage. It can be adjusted to either a hard (H) or semi-hard (HR04) state to meet application requirements.
- The tubing undergoes a rigorous heat treatment process, followed by control tests for tensile strength, hardness, and other mechanical properties, to ensure compliance with ASTM B111 standards.
4. Customized Services
- TORICH supports non-standard sizes, custom tolerances, and surface treatment services, including end chamfering and deburring for easy assembly and welding.
- We also offer bends, U-bends, coils, and other forms, customizable to customer drawings. We accept customer-specified markings, labels, and packaging markings.
- : Surface condensers, low-pressure heating pipes, and circulating water piping in thermal power plants and nuclear power plants.
- : Seawater cooling systems, heat exchangers, oil coolers, and hydraulic lines for ships and offshore platforms.
- : Evaporators, condensers, and brine heaters.
- : Offshore platform cooling systems, fire-fighting water rings, and process coolers for processing brine or seawater.
- : Chillers and heat exchange equipment using seawater or brackish water as the cooling medium.
- : Heat exchangers for handling corrosive process fluids.
| Ni + Co (%) | C (%) | S (%) | P (%) | ||||||
|---|---|---|---|---|---|---|---|---|---|
| C70600 | 88.6 – 90.5 | 10.0 – 11.0 | 1.0 – 1.8 | 1.0 (Max) | 0.05 (Max) | 1.0 (Max) | 0.05 (Max) | 0.05 (Max) | 0.02 (Max) |
| Yield Strength (0.2% offset) | |||||||
|---|---|---|---|---|---|---|---|
| 380 – 450 MPa | 140 – 170 MPa | 30 – 35% | 90 max | ~29 W/m·K | 8.94 g/cm³ | ~1085 ℃ |
| UNS C71500 | With a nickel content of approximately 30%, it offers superior resistance to seawater corrosion, but at a higher price. |
| Titanium Grade 2 | It resists seawater corrosion and is lighter than C70600, but is more expensive and requires specialized welding processes. |
| UNS S32205 | It possesses higher mechanical strength and good corrosion resistance, but has poor thermal conductivity and is not resistant to biofouling. |
Q: Why is C70600 tubing suitable for seawater systems?
A: Because the copper content in C70600 forms a protective oxide film, providing excellent resistance to biofouling and seawater corrosion, it is suitable for marine cooling systems, desalination plants, and offshore platforms.
A: We offer outer diameters from 6mm to 108mm and wall thicknesses from 0.5mm to 5mm. Custom sizes are available.
A: We offer pickling and passivation, mechanical polishing, and bright annealing. For high-cleanliness applications, electropolishing is available.
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