Product Description
ERCu Deoxidized Copper TIG Welding Rod – Clean, Conductive, and Color-Matching Copper Welds
ERCu (Deoxidized Copper) TIG welding rod is a high-purity filler metal designed for joining copper to itself or to galvanized or mild steel in applications where extreme strength is not required. Composed of 98% or more copper with trace additions of phosphorus and silicon, this alloy offers excellent flow characteristics and produces weld deposits that match the color of copper while maintaining high electrical conductivity and minimal porosity.
Ideal for plumbing, HVAC systems, and corrosion-resistant overlays, ERCu is widely used in industries where aesthetic finish, electrical conductivity, and corrosion protection are critical. Its smooth arc and easy handling make it a reliable choice for TIG welders working on copper tanks, fittings, and piping systems.
Key Features:
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High-purity copper filler metal (98% min Cu content)
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Designed for TIG welding copper to copper, or copper to steel
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Color-matched welds with excellent conductivity
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Produces porosity-free, clean weld deposits
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Great for overlaying steel to increase corrosion resistance
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Flows easily with excellent arc stability
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Compatible with both 100% Argon or 100% Helium shielding gases
Mechanical Properties:
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Tensile Strength: 8,000 psi
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Yield Strength: 29,000 psi
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Elongation in 2": 29%
Typical Wire Chemistry (AWS A5.7 ERCu):
| Element | Max % |
|---|---|
| Cu (incl. Ag) | 98.0 min |
| Sn | 1.0 |
| Mn | 0.50 |
| Si | 0.50 |
| P | 0.15 |
| Al | 0.01 |
| Pb | 0.02 |
| Other | 0.50 |
| Diameter | Amps | Shielding Gas | Flow Rate |
|---|---|---|---|
| 1/16" | 70–120 A | 100% Argon or Helium | 40–55 CFH |
| 3/32" | 120–160 A | 100% Argon or Helium | 40–55 CFH |
| 1/8" | 170–230 A | 100% Argon or Helium | 40–55 CFH |
Typical Applications:
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Joining deoxidized copper fittings, pipes, and tanks
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Fabrication and repair of copper-based systems
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Overlaying mild steel surfaces for corrosion resistance
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Plumbing, HVAC, electrical, and general fabrication projects
Why Welders Choose ERCu TIG Rods:
When you need a clean, conductive, and visually seamless copper weld, ERCu delivers. Its forgiving arc and porosity-free finish make it ideal for copper work where reliability and aesthetics matter.
