Product Overview – ASTM B111 C70600 (O61) Copper-Nickel Low Finned Tube
The ASTM B111 C70600 (90/10 Cu-Ni) seamless low-finned tube, in O61 annealed temper, is designed for oil cooler systems, marine heat exchangers, and condenser units. With integrally formed spiral fins, it increases thermal transfer area—critical for high-performance systems in ship cooling, industrial chillers, and power generation plants.
Technical Specifications
- Standard: ASTM B111 / ASME SB111
- Alloy: UNS C70600 – 90/10 Copper-Nickel
- Temper: O61 (annealed)
- Tube Type: Seamless Low Finned
- Outer Diameter / Wall Thickness: 16–19 mm OD, 1.0–1.5 mm WT
- Fin Pitch: Customizable
- Testing: 100% Eddy Current Testing (ECT)
Chemical & Mechanical Properties
Chemical Composition (C70600) sourced from the Copper Development Association:
- ≥ 88.6 % Cu, 9–11 % Ni, 1–1.8 % Fe
Mechanical Performance (O61 Temper)
- Tensile ≥ 275 MPa | Yield ≥ 105 MPa | Elongation ≥ 30% | Hardness ≤ 65 HRB
- Thermal Conductivity: ~50 W/m·K – ideal for oil cooler tubing
Typical Applications
This tube is commonly used in:
Its high nickel content enables excellent resistance to seawater corrosion, biofouling, and hydrogen-induced cracking.
Market Insights & Industry Trends
According to ResearchAndMarkets, the global copper-nickel tube market is expected to grow from USD 3.5B in 2024 to USD 5.2B by 2033, driven by:
- Rising offshore platform projects
- Demand for desalination heat exchangers
- Surge in industrial oil cooling infrastructure
Nickel volatility (tracked by London Metal Exchange) makes long-term sourcing stability more valuable than ever.
Quality Standards & DLSSPIPELINE Capabilities
At DLSSPIPELINE, we specialize in:
- Seamless low fin production to OEM precision
- ASTM B111 seamless tube exports with EN 10204 3.1 certificates
- Optional 3rd-party inspection (SGS, TÜV, BV)
- Fin customization: fin pitch, depth, length — all tailored
Packaging & Global Logistics
- End-capped, moisture-proof bundled, and ISPM15-certified wooden crate packed
- Delivery across 40+ countries with DDP, FOB, or EXW terms
- Each bundle marked with alloy, OD, WT, heat number, and standard
Summary: Why Choose DLSSPIPELINE?
| Feature | Value |
|---|---|
| Marine-Grade Durability | Trusted for 30+ years in marine heat exchanger tubing |
| Thermal Performance | Ideal for oil cooler tube assemblies |
| Seamless, Low Finned Design | No welds, better heat exchange, less risk |
| Global Expertise | We serve industrial clients worldwide with custom tubing solutions |
Contact & Quote
Ready to Upgrade Your Oil Cooler System?
Choose ASTM B111 C70600 seamless copper nickel finned tubes from DLSSPIPELINE — engineered for longevity, reliability, and efficiency.
Email: info@dlsspipeline.com
Web: www.dlsspipeline.com
