Polished CuNi 70/30 Copper Nickel Bar High Temp Resistant C71500
Polished CuNi 70/30 Copper Nickel Bar High Temp Resistant C71500
1.Product Description
Copper nickel bar is a solid rod material based on copper with nickel as the main alloying element. Common grades by nickel content include CuNi8 (~8% Ni), CuNi10 (~10% Ni), CuNi14 (~14% Ni), CuNi19 (~19% Ni), CuNi30 (~30% Ni), as well as ASTM grades C70600 (90/10 cupronickel) and C71500 (70/30 cupronickel). The bars are produced via vacuum melting, hot extrusion, multiple‑pass cold drawing, straightening and polishing, offering precise dimensional tolerances and a surface free from scale, cracks or folds. Applicable standards include ASTM B151/B151M, EN 12163, GB/T 4423, and JB/T 4755
2.Product Applications
Thanks to their excellent overall performance, copper nickel bars are widely applied in:
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Marine and offshore structures:Seawater circulation piping, valve stems, heat exchanger tube sheets, propeller shaft sleeves, submarine cable sheaths, offshore platform fasteners.
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Petrochemical industry:Acid‑resistant pump shafts, reactor agitators, evaporator heating tubes, tank inner lining strips.
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Electric power:Resistance elements in high‑voltage circuit breakers, shunts, transformer winding cores.
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Automotive and machinery:Hydraulic brake hard tubes, pneumatic connectors, precision gear blanks, plain bearing bushes.
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Instrumentation:Thermocouple sheaths, thermometer protection tubes, pressure measurement conduits.
3.Product Advantages
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Extreme corrosion resistance:Excellent resistance to both general and localized corrosion in seawater, chloride solutions, dilute sulfuric acid and alkaline media, with very low pitting and crevice corrosion tendency.
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High strength‑toughness balance:Higher strength than pure copper and brass, while maintaining elongation above 20%, with good impact and fatigue resistance.
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Erosion and cavitation resistance:Low corrosion rate even in seawater with flow velocity up to 5 m/s, and outstanding resistance to cavitation peeling.
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Workability:Good machinability for turning, milling, drilling and tapping; hot bending and welding (TIG, resistance welding) can be performed without special difficulties.
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Wide service temperature range:From -250°C to +350°C, mechanical properties change gradually without low‑temperature brittleness or high‑temperature softening.
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Long‑term reliability:Service life up to 30 years in marine environments, with very low maintenance costs.
4.Product Specifications
| Parameter | CuNi10 | C70600 (90/10) | C71500 (70/30) |
| Nickel Content (%) | ~10 | ≥29 | 29–33 |
| Copper Content (%) | ~90 | ≥55 | ≥65 |
| Density (g/cm³) | 8.87 | 8.90 | 8.94 |
| Melting Point (°C) | 1100–1200 | ~1220 | ~1240 |
| Tensile Strength (MPa) | ≥450 | ≥510 | ≥480 (typical) |
| Yield Strength (MPa) | ≥275 | ≥260 | ≥180 |
| Elongation (%) | 20–35 | ≥30 | ~30 |
| Resistivity (μΩ·m) | 0.24 | 0.32 | 0.50 |
| Service Temperature Range (°C) | -200 ~ +300 | -200 ~ +300 | -200 ~ +350 |
FAQ
1. Are you trading company or manufacturer ? We are manufacturer ,You can see the certification.
2.How long is your delivery time? Generally it is 5-10 days if the goods are in stock. or it is 15-20 days if the goods are not in stock, it is according to quantity.
3. Do you provide samples ? is it free or extra ? Yes, we could offer the sample for free charge but need pay the cost of freight.
4. What is your terms of payment ? Payment<=1000USD, 100% in advance. Payment>=1000USD, 50% T/T in advance ,balance before shippment.
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