70/30 Copper-Nickel
Overview
C71500 is the premium 70/30 copper-nickel alloy offering the highest seawater corrosion resistance in the copper-nickel family. With greater strength and resistance to erosion-corrosion than C70600, it is specified for the most demanding marine and power generation environments.
As a C71500 70/30 copper-nickelsupplier, Triton Bronze & Metals stocks copper in tube, pipe, sheet, and more — all cut to length and shipped from US mills. Certified mill test reports available to meet your quality requirements.
Chemical Composition — C71500
| Element | Content |
|---|---|
| Copper (Cu) | 63% min |
| Nickel (Ni) | 29-33% |
| Iron (Fe) | 0.4-1% |
| Manganese (Mn) | 1% max |
| Lead (Pb) | 0.02% max |
| Zinc (Zn) | 1.0% max |
Mechanical Properties
Physical Properties
| Property | Value |
|---|---|
| Density | 0.323 lb/in³ (8.94 g/cm³) |
| Melting Range | 2140-2260°F (1171-1238°C) |
| Modulus of Elasticity | 22,000 ksi (152 GPa) |
| Thermal Conductivity | 17.0 BTU/ft·hr·°F (29.4 W/m·K) |
| Coefficient of Thermal Expansion | 8.9 × 10⁻⁶ /°F (16.0 × 10⁻⁶ /°C) |
| Electrical Conductivity | 4.6% IACS |
Applicable Specifications
- ✓ASTM B111 (Tube)
- ✓ASTM B171 (Plate)
- ✓ASTM B122 (Sheet/Strip/Bar)
- ✓MIL-C-15726 (Pipe & Tube)
Fabrication & Joining
| Process | Rating |
|---|---|
| Soldering | Good |
| Brazing | Good |
| Oxyacetylene Welding | Fair |
| Gas Shielded Arc Welding | Good |
Common Applications
- •High-velocity seawater systems
- •Power plant condensers
- •Desalination equipment
- •Salt water cooling systems
- •Marine exhaust systems
- •Offshore platforms
Frequently Asked Questions
What forms is C71500 70/30 Copper-Nickel available in?+
We supply C71500 in Tube, Pipe, Sheet, Plate, Round Bar. All material is sourced from US mills, cut to length, and shipped directly to your facility.
What are the typical applications for C71500?+
C71500 is commonly used for high-velocity seawater systems, power plant condensers, desalination equipment, salt water cooling systems. Contact us for application-specific recommendations.
Can I get a mill test report for C71500?+
Yes. Mill test reports (MTRs) are available upon request for all C71500 orders. We can also provide material certifications to meet your quality requirements.
Dimensional Tolerances
For standard finishing allowances, diameter tolerances, and concentricity data for continuous cast copper products, see our tolerance reference.
View Tolerances & Finishing Allowances →Need Finished Parts?
Need C71500 machined to spec? We offer custom machined parts, bronze bushings, bearings, and wear components in any alloy we stock.
View Finished Parts & Components →Available Forms
- Tube
- Pipe
- Sheet
- Plate
- Round Bar
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