CuNi 70/30 (ERCuNi)
- Standards: AWS A5.7 ERCuNi, DIN S Cu 7158 (CuNi30Mn1Fe)
- Properties: Outstanding resistance to seawater corrosion and erosion.
- Applications: Marine condensers, desalination plants, seawater piping.
Copper-Based Welding Consumables – CuNi, Aluminum Bronze, Silicon Bronze & Brass
Copper-based welding consumables are widely used in marine, desalination, power, and industrial applications due to their excellent corrosion resistance, thermal conductivity, and mechanical properties. Alloys such as CuNi (70/30, 90/10), Aluminum Bronze, Silicon Bronze, and Brass offer specialized performance in seawater, high-wear, and industrial environments.
We supply a comprehensive range of Copper Alloy Welding Electrodes, TIG Rods, MIG Wires, and Brazing Consumables in compliance with AWS, EN ISO, and DIN standards.
Key Advantages of Copper Alloy Welding Consumables
- Superior corrosion resistance – in seawater and saline environments.
- Excellent wear and galling resistance – ideal for Aluminum Bronze applications.
- Good thermal and electrical conductivity – especially in CuNi and Silicon Bronze alloys.
- Cavitation and erosion resistance – suitable for pumps and propellers.
- Excellent weldability and crack resistance – across all major welding processes.
Comparison Table – Copper Alloys & Specifications
| Alloy / Trade Name | AWS Specification | EN ISO / DIN Equivalent | Typical Applications |
|---|---|---|---|
| CuNi 70/30 (ERCuNi) | AWS A5.7: ERCuNi | DIN 1733: S Cu 7158 (CuNi30Mn1Fe) | Marine piping, condensers, heat exchangers |
| CuNi 90/10 (ERCuNiAl) | AWS A5.7: ERCuNiAl | DIN: CuNi10Fe1Mn | Desalination plants, seawater systems, shipbuilding |
| Aluminum Bronze (ERCuAl-A2) | AWS A5.7: ERCuAl-A2 / A5.6: ECuAl-A2 | EN ISO 24373: CuAl8 | Pump impellers, propellers, wear parts, aerospace |
| Silicon Bronze (ERCuSi-A) | AWS A5.7: ERCuSi-A | EN ISO 24373: CuSi3Mn1 | Sheet metal joining, HVAC, automotive, art casting |
| Brass (ERCuZn-A) | AWS A5.7: ERCuZn-A | EN ISO 24373: CuZn39Sn | Heat exchangers, radiators, decorative works |
| Phosphor Bronze (ERCuSn-A) | AWS A5.7: ERCuSn-A | EN ISO 24373: CuSn6P | Bushings, bearings, springs, electrical |
Popular Copper Alloy Welding Consumables – Details
CuNi 90/10 (ERCuNiAl)
- Standards: AWS A5.7 ERCuNiAl, DIN CuNi10Fe1Mn
- Properties: High strength, seawater cavitation resistance, good weldability.
- Applications: Shipbuilding, offshore piping, desalination, heat exchangers.
Aluminum Bronze (ERCuAl-A2 / ECuAl-A2)
- Standards: AWS A5.7 ERCuAl-A2, AWS A5.6 ECuAl-A2, EN ISO CuAl8
- Properties: Exceptional wear resistance, high strength, cavitation resistance.
- Applications: Pump impellers, propellers, aerospace landing gear, heavy-duty bearings.
Silicon Bronze (ERCuSi-A)
- Standards: AWS A5.7 ERCuSi-A, EN ISO CuSi3Mn1
- Properties: High corrosion resistance, good conductivity, easy weldability.
- Applications: HVAC, automotive exhaust, sheet metal fabrication, art/craft welding.
Brass (ERCuZn-A)
- Standards: AWS A5.7 ERCuZn-A, EN ISO CuZn39Sn
- Properties: Good strength, machinability, corrosion resistance.
- Applications: Heat exchangers, radiators, decorative components.
Phosphor Bronze (ERCuSn-A)
- Standards: AWS A5.7 ERCuSn-A, EN ISO CuSn6P
- Properties: High fatigue resistance, wear resistance, electrical conductivity.
- Applications: Electrical connectors, bushings, springs, marine hardware.
Forms of Supply
- Welding Electrodes (SMAW)
- TIG Welding Rods (GTAW)
- MIG Welding Wires (GMAW)
- Submerged Arc Wires & Fluxes (SAW)
- Brazing Rods & Fluxes
Applications Across Industries
- Marine & Shipbuilding: seawater systems, desalination, heat exchangers
- Oil & Gas: offshore pipelines, cooling systems
- Power Generation: condensers, turbines, cooling towers
- Aerospace & Defense: landing gear, propellers, wear components
- Automotive & HVAC: exhaust systems, sheet metal joining
- Art & Architecture: decorative bronze and brass works
Why Choose Copper Alloys?
- Superior corrosion resistance in saline and industrial waters
- Excellent wear and cavitation resistance for pumps and propellers
- High thermal and electrical conductivity for industrial and electrical applications
- Reliable performance across marine, power, aerospace, and industrial sectors
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