ASTM B111 UNS C71500 Copper Nickel Seamless Pipe OD 1/2"-12" Corrosion Resistant Condenser & Boiler Tube
ASTM B111 UNS C71500 Copper Nickel Seamless Pipe OD 1/2"-12" Condenser & Boiler Tube
1.Product Description
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Copper-based nickel-alloy tubes, commercial grades: 90-10 (C70600, ~10% Ni) and 70-30 (C71500, ~30% Ni).
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Micro-additions of iron (Fe) and manganese (Mn) enhance seawater corrosion resistance and erosion resistance. The alloy exhibits a single-phase face-centered cubic (FCC) structure with no risk of phase embrittlement over a wide temperature range.
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Available in seamless (ASTM B466) and welded (ASTM B467) forms, featuring clean, oxide-free internal bores and precision cold-drawn dimensional tolerances.
2.Product Applications
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Marine & Offshore: Seawater cooling systems, firewater lines, ballast piping.
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Power Generation: Steam turbine condensers, feedwater heaters, air-cooler tube bundles.
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Desalination: Heating sections and evaporator tubes in MSF and MED plants.
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Oil & Gas Extraction: Platform utility piping, riser anti-corrosion sheathing.
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General Industry: Hydraulic tubing, chemical-resistant piping for corrosive media.
3.Product Advantages
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Ultra-low corrosion rate: ≤0.025 mm/year in seawater, with a self-healing surface oxide film.
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Natural biofouling resistance: Continuous copper ion release creates a biostatic surface, extending cleaning intervals by over 60% compared to stainless steel.
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Excellent strength-toughness balance: Tensile strength 275~345 MPa, elongation ≥25%, combining strength and ductility.
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Superior workability: Compatible with TIG welding, brazing, mechanical expansion, and cold bending (minimum bend radius 1.5D) – no risk of stress corrosion cracking (SCC).
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Long service life & recyclability: Design life 15~25 years, 100% recyclable, offering outstanding life-cycle economy.
4.Key Product Specifications
| Parameter | 90-10 (C70600) | 70-30 (C71500) | Selection Hint |
| Nickel Content (Ni %) | 9.0 ~ 11.0 | 29.0 ~ 33.0 | 70-30 better for high temp & erosion |
| Iron Content (Fe %) | 1.0 ~ 1.8 | 0.4 ~ 1.0 | 90-10 stronger impingement resistance |
| Tensile Strength (Annealed, MPa) | ≥275 | ≥345 | 70-30 higher pressure capability |
| Yield Strength (Annealed, MPa) | ≥105 | ≥140 | — |
| Elongation (Annealed, %) | ≥25 | ≥30 | 70-30 better toughness |
| Hardness HV (Annealed) | ≈130 | ≈150 | — |
| Density (g/cm³) | 8.90 | 8.94 | Negligible difference |
| Thermal Conductivity (W/m·K) | ~50 | ~29 | 90-10 significantly better for heat transfer |
| Max Continuous Service Temp (°C) | 250 | 300 | 70-30 more heat-resistant |
| OD Supply Range (mm) | Φ6 ~ 325 | Φ6 ~ 325 | Custom sizes available |
| WT Supply Range (mm) | 1.0 ~ 30.0 | 1.0 ~ 30.0 | — |
| Single Length (m) | Up to 16 (fixed tolerance ±3mm) | Up to 16 (fixed tolerance ±3mm) | — |
| Delivery Condition | Annealed (O) or Light-Drawn (H) | Annealed (O) or Light-Drawn (H) | Must specify on order |
| Recommended Max Seawater Velocity (m/s) | ≤4.5 | ≤5.0 | 70-30 allows higher velocity |
| Applicable Standards | ASTM B466/B467/B111; DIN 86019; GB/T 8890 | Same | ABS, DNV, LR certificates available |
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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