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Specifications
AWS A5.7 Class
ERCu, AWS A5.27 RCu
ASME SFA5.7, ASME SFA5.27
ERCu
QQ-R-571C, MIL-R-19631B Type MIL-RCu-2
MIL-C-19654 (MIL-RCu-C)
Description
AWS A5.7 Class ERCu is a 98%
copper filler metal used for MIG, TIG and oxyacetylene
welding of copper and copper-alloyed base metals.AWS
A5.7 Class ERCu contains small amounts of phosphorus
and silicon which act as the idizing agents to
promote sound weld joints. AWS A5.7 Class ERCu is easy
flowing and produces weld deposits that are porosity
free, electrically conductive and the color will match
that of copper. Excellent for joining copper to mild
steel, for overlaying steel and for the fabrication
of copper pipes, tanks and copper fittings.
The
oxyacetylene gas flame must be neutral or slightly oxidizing.
Tip size must be one to two sizes larger than the base
plate. Preheating should be done only if the part is
thick. A boric acid or borax flux is recommended.
Chemical Composition
(%max., unless shown as range or min.)
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