ASTM B466 C70600 Seamless Copper-Nickel Pipe and Tube Manufacturer
We supply ASTM B466 C70600 seamless copper-nickel pipes and tubes engineered for superior corrosion resistance and long service life in demanding marine, offshore, and industrial environments. C70600, also known as 90/10 Copper-Nickel, contains 90% copper and 10% nickel, with small additions of iron and manganese to enhance its corrosion resistance, particularly in seawater and brackish water systems.
Our C70600 seamless CuNi tubes are manufactured in strict accordance with ASTM B466 specifications, ensuring excellent mechanical properties, uniform wall thickness, and superior surface finish.
What Is ASTM B466 C70600?
ASTM B466/B466M defines the chemical, mechanical, and manufacturing requirements for seamless copper-nickel pipes and tubes made from specific copper-nickel alloys. The specification includes several alloy designations, and UNS C70600 refers to the 90/10 copper-nickel alloy (commonly called CuNi 90/10).
- ASTM B466 / B466M – Standard Specification for Seamless Copper-Nickel Pipe and Tube.
- UNS C70600 – A copper-nickel alloy with approximately 90 % copper and 10 % nickel, with controlled amounts of iron and manganese.
ASTM B466 C70600 Standards & Specifications
- Material Grade: C70600 (UNS No. C70600) – 90/10 Copper-Nickel
- Standard: ASTM B466 – Seamless Copper-Nickel Pipe and Tube
- Forms: Straight length tubes, seamless pipes
- Manufacturing Process: Seamless extrusion and cold drawing
- Size Range: OD from 6 mm to 219 mm (custom sizes available)
- Wall Thickness: 0.7 mm to 20 mm (per customer requirement)
- Lengths: 6 meters (custom cut lengths available)
ASTM B466 C70600 Chemical Requirements
| TABLE 1 Chemical Requirements | |||||||||
| Copper Alloy UNS Nos. | Copper | Nickel incl Cobalt | Lead, max | Iron | Zinc, max | Manganese | Sulfur, max | Phosphorus, max | Chromium / Other |
| C70600 | remainder | 9.0–11.0 | 0.05A | 1.0–1.8 | 1.0A | 1.0 max | 0.02 | 0.02 | A |
ASTM B466 C70600 Mechanical Requirements
| TABLE 2 Mechanical Requirements | |||||
| Standard Temper | Former Temper | Copper Alloy UNS Nos. | Tensile Strength min ksi (MPa) | Yield Strength min ksi (MPa) | Rockwell Hardness 30T |
| O60 | Soft anneal | C70600 | 38 (260) | 13 (90) | 45 max |
| H55 | Light drawn | C70600 | 45 (310) | 35 (240) | 45–70 |
| H80 | Hard drawn | C70600 | 50 (345) | 40 (275) | 63 min |
ASTM B466 C70600 tube Wall Thickness Tolerances
| TABLE 3 Wall Thickness Tolerances | |||||||
| Wall Thickness in [mm] | 1/32–1/8 | Over 1/8–5/8 | Over 5/8–1 | Over 1–2 | Over 2–4 | Over 4–7 | Over 7–10 |
| Up to 0.017 [0.40] | 0.0025 | 0.0015 | 0.002 | 0.0025 | — | — | — |
| 0.017–0.024 | 0.004 | 0.0025 | 0.0025 | 0.003 | — | — | — |
| 0.024–0.034 | 0.004 | 0.003 | 0.003 | 0.004 | 0.005 | — | — |
| 0.034–0.057 | 0.004 | 0.004 | 0.0045 | 0.0045 | 0.0065 | 0.009 | — |
| 0.057–0.082 | — | 0.0045 | 0.005 | 0.005 | 0.0075 | 0.010 | 0.013 |
Testing & Inspection
ASTM B466 C70600 seamless pipe and tube undergo strict inspection, including:
- Chemical analysis
- Tensile testing
- Eddy current or hydrostatic testing
- Dimensional inspection
- Visual inspection
- Certification: EN 10204 3.1 / ASME MTR
C70600 vs C71500 Copper-Nickel
| Item | C70600 (90/10) | C71500 (70/30) |
|---|---|---|
| Seawater Velocity | Moderate | Higher |
| Corrosion Resistance | Excellent | Superior |
| Strength | Good | Higher |
| Typical Use | General marine | Severe seawater |
ASTM B466 C70600 seamless copper-nickel pipe and tube (CuNi 90/10) offer exceptional corrosion resistance, durability, and long service life for marine, offshore, and seawater applications. Fully compliant with ASTM B466 / ASME SB466, these CuNi 90/10 seamless products are a reliable and cost-effective solution for harsh corrosive environments.
