Introduction
ASTM B111 C70600 (O61) Seamless Tube is one of the most widely used copper-nickel alloys for condenser and heat exchanger applications. DLSS supplies tubes in the size 16 mm OD × 1.0 mm wall thickness × 3000 mm length, manufactured in accordance with ASTM B111, and each tube is subjected to 100% Eddy Current Testing to ensure flawless quality and performance.
C70600, also known as 90/10 Copper-Nickel (CuNi 90/10), offers an outstanding combination of corrosion resistance, durability, and heat transfer efficiency, making it the preferred material for power plants, desalination systems, and marine cooling applications.
Material Overview – C70600 Copper-Nickel
C70600 (UNS C70600 / CuNi 90-10) is a copper alloy containing approximately 90% copper and 10% nickel, with controlled amounts of iron and manganese to enhance seawater corrosion resistance.
Key advantages of ASTM B111 C70600 (O61) Seamless Tube:
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Excellent resistance to seawater corrosion and biofouling
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High resistance to erosion and impingement attack in flowing seawater
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Good mechanical strength and thermal conductivity
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Long service life in marine and industrial environments
Specifications
| Item | Details |
|---|---|
| Standard | ASTM B111 |
| Material | C70600 (CuNi 90/10) – O61 Annealed |
| Size | 16 mm OD × 1.0 mm Wall Thickness × 3000 mm Length |
| Type | Seamless Tube |
| Testing | 100% Eddy Current Testing |
| Applications | Condenser, Heat Exchanger, Seawater Cooling Systems |
Applications
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Power Plant Condensers
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Desalination Plants
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Shipbuilding & Marine Engineering (cooling water systems, condensers)
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Chemical & Petrochemical Plants
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Offshore Oil & Gas Platforms
Why Choose DLSS C70600 Seamless Tubes?
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Strict ASTM B111 Compliance – Manufactured to international standards
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100% Eddy Current Testing – Guarantee of defect-free performance
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High Reliability in Seawater Environments – Proven CuNi 90/10 corrosion resistance
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Custom Supply Options – Straight lengths, U-bends, and cut-to-size available
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Export-Ready Packaging – Bundles or ISPM-15 wooden cases with end caps
Frequently Asked Questions (FAQ)
Q1: What does O61 mean in C70600 tubes?
A1: O61 refers to the annealed condition, which improves ductility and workability.
Q2: Why is CuNi 90/10 preferred for condensers?
A2: It provides excellent resistance to seawater corrosion, erosion, and biofouling, ensuring long-term service life.
Q3: Can DLSS supply other sizes of ASTM B111 tubes?
A3: Yes, we supply a wide range of sizes, wall thicknesses, and lengths to meet project requirements.
Q4: Are third-party inspections available?
A4: Yes, SGS, BV, TUV, or client-nominated agencies can witness testing before shipment.
