Strength and Performance in Extreme Environments
In an annealed temper, serves critical roles in various industrial applications. These alloys excel in environments where corrosion resistance and durability are paramount, such as industrial condensers, heat exchangers, evaporating equipment, and marine applications. Their ability to withstand the corrosive effects of a wide range of chemicals ensures long-term reliability and protection against contamination. In particular, copper-nickel alloys maintain their strength even at elevated temperatures better than brasses or pure copper. The choice between 70-30 and 90-10 Copper-Nickel depends on the severity of corrosion and temperature conditions. In more demanding environments, such as those found in marine applications, 70-30 Copper-Nickel is often preferred for its superior resistance to corrosion and higher tolerance for extreme temperature conditions.
Applications for C70600 90/10 & C71500 70/30 – Copper Nickel
Architectural
Condenser Tubes
Condenser Plates
Evaporator Tubes
Fasteners
Fittings
Fire Supression Systems
Flanges
Heat Exchangers
Impellers
Tubesheets
Valve Bodies
Technical Data Comparison Table
| Property / Characteristic | C70600 (90-10 Copper Nickel) | C71500 (70-30 Copper Nickel) |
|---|---|---|
| Common Name | 90-10 CuNi | 70-30 CuNi |
| Composition | Cu: Rem. Ni: 9.0-11.0% Fe: 1.0-2.0% Mn: 0.5-1.0% Zn: 1.0% max |
Cu: Rem. Ni: 29.0-33.0% Fe: 0.40-1.0% Mn: 0.4-1.0% Zn: 1.0% max |
| Density | 0.323 lb/in³ (8.94 g/cm³) | 0.323 lb/in³ (8.94 g/cm³) |
| Melting Point (Liquidus) | 2140°F (1170°C) | 2260°F (1240°C) |
| Tensile Strength (Annealed) | 44 ksi (300 MPa) | 54 ksi (370 MPa) |
| Yield Strength, 0.2% Offset (Annealed) | 17 ksi (115 MPa) | 20 ksi (140 MPa) |
| Elongation (Annealed) | 40% | 45% |
| Hardness (Rockwell B, Annealed) | 40 HRB | 65 HRB |
| Modulus of Elasticity | 22 x 10⁶ psi (150 GPa) | 22 x 10⁶ psi (150 GPa) |
| Thermal Conductivity | 29 Btu/(ft·h·°F) (50 W/(m·K)) |
17 Btu/(ft·h·°F) (29 W/(m·K)) |
| Electrical Conductivity | 9% IACS | 5% IACS |
| General Corrosion Resistance | Excellent | Superior |
| Velocity Limitations (Seawater) | Good | Excellent (higher tolerance) |
| Resistance to Stress Corrosion Cracking | Excellent | Excellent |
| Biofouling Resistance | Good | Excellent |
| Typical Applications | Seawater piping, condensers, heat exchanger tubes, marine hardware. | Power plant condensers, high-reliability seawater systems, marine heat exchangers, saltwater piping. |
What We Can Provide
| Product Form | Available Standards / Specifications | Available Conditions |
|---|---|---|
| Pipe & Tube | Seamless: ASTM B466, B111, B543 Welded: ASTM B467 |
Annealed, Half-Hard, Hard Drawn |
| Sheet & Plate | ASTM B171, B402 | Hot Rolled, Cold Rolled, Annealed |
| Bar & Rod | ASTM B151 | Round, Hexagonal, Square (Hot Rolled, Cold Drawn, Annealed) |
| Fittings & Flanges | ASTM / ASME B366, B462, ANSI B16.9 / B16.5 | Forged, Machined |
| Wire | ASTM B206 | Cold Drawn, Annealed |
Additional Services We Offer
Cutting & Shearing: We can provide material cut to your exact length and size requirements.
Certification: All materials are supplied with a Mill Test Certificate (MTC) to EN 10204 3.1 or equivalent.
Material Traceability: Full heat/lot number traceability is guaranteed.
Technical Support: Our team can provide technical assistance for your material selection and application needs.
Our spot inventory
| ASME SB111 C70600 |
C70600 seamless condenser tube |
C70600 welded copper nickel pipe |
| ASTM B111 C71500 |
ASTM B466 C71500 pipe |
C71500 cupronickel boiler tube |
| 70/30 copper nickel pipe |
C71500 heat exchanger tube |
C71500 welded copper nickel pipe |
| SB111 UNS C70600 |
70/30 cupronickel condenser tube |
ASTM B111 C70600 heat exchanger tube |
|
C71500 copper nickel pipe |
ASTM B111 C70600 heat exchanger tube |
ASME SB111 C71500 copper nickel pipe |
About us
Gnee is a premier manufacturer and international supplier of comprehensive copper and copper alloy products, committed to delivering excellence in copper tubes, copper sheets, copper plates, copper bars, copper rods, copper wires, and copper strips.
Our Extensive Product Portfolio & Specifications:
Copper Tubes & Pipes:
We supply a full range including **Capillary Tubes, Thin-Walled Copper Tubes, Thick-Walled Copper Tubes, Round Pipes, Square Pipes, Rectangular Pipes, Welded Pipes, Seamless Pipes, Heat Exchanger Tubes, and Condenser Tubes.
Copper Sheets, Plates:
Our flat-rolled products cover Copper Foils, Thin Sheets, Thick Plates, and Circles (Round Plates) in various tempers (O, H) for diverse applications.
Copper Bars, Rods & Profiles:
We offer Round Bars, Square Bars, Hexagonal Bars, and Flat Bars with excellent machinability and strength.
Copper Wires & Strips:
Our lineup includes high-conductivity Bare Copper Wires, Stranded Wires, and precisely manufactured Copper Strips.
Common Alloys & International Standards:
We master a wide array of materials compliant with ASTM, EN, JIS, and GB standards:
Pure Copper: C11000 (ETP Copper), C10200 (Oxygen-Free Copper), C12000 (DLP)
Brass Alloys: C26000 (Cartridge Brass), C27200 (Brass), C28000 (Muntz Metal)
Copper-Nickel: C70600 (CuNi90/10), C71500 (CuNi70/30)
Phosphor Bronze: C51900, C52100, C54400
Serving industries from HVAC/R and plumbing to electrical, automotive, and marine engineering, Gnee provides OEM support, competitive pricing, and reliable bulk supply for your global projects.
