B111 / SB111 C71500 Copper Nickel Tube O61 Annealed, Cold Drawn Seamless Tubing For Evaporator
B111 / SB111 C71500 Copper Nickel Tube O61 Annealed, Cold Drawn Seamless Tubing For Evaporator
Overview
ASTM B111/SB111 C71500 (70/30 copper-nickel) seamless tube, cold drawn and O61 annealed, is a high-performance alloy tubing designed for evaporators and critical heat transfer equipment. Featuring balanced copper, nickel, and iron composition, it delivers exceptional seawater corrosion resistance, erosion resistance, and thermal stability.
O61 annealing ensures optimal ductility, formability, and stress relief, making it suitable for expansion, bending, and assembly. Widely used in marine, offshore, desalination, and power plant evaporators, it offers reliable performance under high-pressure and corrosive conditions.
Cold drawn seamless manufacturing ensures precise dimensions, uniform wall thickness, and superior structural integrity. This tube combines excellent heat transfer efficiency and long service life, ideal for demanding evaporator applications.
Features of ASTM B111 C71500 Seamless Tube
- Premium 70/30 copper‑nickel alloy (UNS C71500) with outstanding corrosion resistance to seawater, brine, and marine environments.
- Seamless cold‑drawn construction for uniform wall thickness, high dimensional accuracy, and excellent structural integrity.
- O61 soft annealed condition provides high ductility, good formability, and stress relief, ideal for tube expansion, bending, and flaring.
- Superior erosion and cavitation resistance suitable for high‑velocity fluid systems.
- Excellent thermal conductivity for efficient heat transfer in condensers, evaporators, and heat exchangers.
- High mechanical strength and good toughness at both ambient and moderate temperatures.
- Resistant to biofouling and pitting corrosion, ensuring long service life.
- Compliant with ASTM B111 / SB111 standards, with full traceability and quality testing including eddy current, hydrostatic, and mechanical tests.
Chemical Composition of C71500
| Cu | Pb | Zn | Fe | Ni | Mn | |
| Min (%) | - | 29.00 | ||||
| Max (%) | Remainder | 0.05 | 1.00 | 1.00 | 33.00 | 1.00 |
Mechanical Properties of C71500
| Form | Temper |
Temper Code |
Tensile Strength (ksi) | YS-0.5% Ext (ksi) |
Elongation (%) |
Rockwell B scale |
Rockwell F scale |
Section Size (in) |
Cold Work (%) |
|
Flat Products |
As Hot Rolled | M20 | 55 Typ | 20 Typ | 45 Typ | 35 Typ | - | 1 | |
| Rod | 1/2 Hard | H02 | 75 Typ | 70 Typ | 15 Typ | 80 Typ | - | 1 | 20 |
| Tube |
Nominal Grain Size 0.025 mm |
OS025 | 60 Typ | 25 Typ | 45 Typ | 45 Typ | 80 Typ | - | - |
|
Nominal Grain Size 0.035 mm |
OS035 | 54 Typ | - | 45 Typ | 36 Typ | 77 Typ | - | - |
Applications of C71500 Copper Nickel Tube
- Chillers
- Heat Condensers & Exchangers
- Power Plants
- Refineries
- Desalination Plants
- Ship Building & Ship Repairs
- High Capacity Power Plants
- Distiller Tubes
- Evaporators & Ferrules
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