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ERCu (Deoxidized Copper) is a filler metal
containing 98% or more copper with small
amounts of Phosphorus and Silicon used for
joining copper to itself or with galvanized or
mild steel where high strength joints are not required.
This easy flowing alloy produces weld
deposits that match the color of copper, are
electrically conductive and porosity free.
Applications
• Joining copper pipes, tanks, and copper fittings
• Joining deoxidized copper
• Overlaying steel surfaces to resist corrosion
AWS Specification
AWS A5.7/A5.7M:2007
AWS Classification ERCu
Welding Current
AC - DCEP
Typical Wire Chemistry
Cu (including 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
Typical Mechanical Properties
(As Welded)
Melting Point 1967ºF
Yield Strength, ksi 8
Tensile Strength, ksi 25
Elongation%, min 25
Available Diameters MIG with
Operating Range in Amps
.035" 100 - 200
.045" 100 - 250
1/16" 250 - 400
Available Diameters TIG/Oxy Rod
with Operating Range in Amps
1/16" 70 - 150
3/32" 225 - 400
1/8" 225 - 400
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