High Strength CuNi 70/30 Copper Nickel Bar Fatigue Resistant ASTM B151
High Strength CuNi 70/30 Copper Nickel Bar Fatigue Resistant ASTM B151
1.Product Description
Copper nickel bar is a solid rod product based on copper with nickel as the primary alloy. Typical grades include CuNi10 (10% Ni), CuNi14 (14% Ni), C70600 (90/10 cupronickel), and C71500 (70/30 cupronickel). Manufactured via vacuum melting, hot extrusion, and precision cold drawing, the bars offer tight dimensional tolerances (down to ±0.05 mm in diameter) and a smooth, oxide-free surface. Compliant with ASTM B151, EN 12163, GB/T 4423, and other standards.
2.Product Applications
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Marine engineering:Seawater cooling pipelines, pump and valve bushings, heat exchanger tube sheets, propeller shaft sleeves.
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Chemical equipment:Corrosion-resistant flanges, fasteners, agitator shafts for reactors, evaporator parts.
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Electrical & power:Resistance elements for low-voltage devices, thermocouple protection tubes.
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Precision manufacturing:Automotive hydraulic brake tubes, precision shafts for instruments, sensor housings.
3.Product Advantages
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Seawater corrosion and erosion resistance:Forms a dense passive film; corrosion rate in flowing seawater < 0.025 mm/year, with excellent cavitation resistance.
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High strength and toughness:Tensile strength ≥ 480 MPa (C71500), elongation ≥ 30%, combining rigidity with impact resistance.
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Excellent workability:Good hot/cold formability; easy to turn, drill, tap; stable weldability (TIG, resistance welding).
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Stable resistivity and thermal conductivity:Resistivity ~0.5 μΩ·m, thermal conductivity 30–75 W/(m·K), suitable for combined heating and cooling applications.
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Low-temperature toughness:Maintains good impact toughness even at -200°C, suitable for LNG and deep-sea equipment.
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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