Washington Alloy

ERCuSi-A - Silicon Bronze, 10lb. Pack

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Minimum Purchase:
10 units
$19.68 - $25.48


ERCuSi-A  (Priced Per Pound, Sold in Quantities of 10)

High-Performance Copper Alloy TIG Welding Rod.

AWS A5.27 Grade
Class ERCuSi-A
Available Diameters .035", .045", 1/16", & 3/32"
Length 36" (914mm)
Weight 10 lb. Pack

Approximate number of rods per 10 lb. pack for each diameter:

  • .035" (0.89mm): 500 - 540
  • .045" (1.14mm): 360 - 400
  • 1/16" (1.6mm): 260 - 300
  • 3/32" (2.4mm): 120 - 160


ERCuSi-A Silicon Bronze is primarily used for TIG, Plasma and Oxy-Acetylene welding or brazing on Steel and Copper Alloys.

A chemical analysis of Copper and Zinc as well as alloying elements of 3% Silicon and small amounts of Tin and Manganese produce welds with excellent mechanical properties.

High strength, ductile and sound welds are easily attained by using a neutral or slightly oxidizing flame (especially on Copper Alloys).

Keep the weld pool small to promote fast solidification and minimize cracking.

A high Boric acid brazing flux is required for Oxy-Acetylene brazing.

Silicon Bronze is ideal for plain and zinc coated thin Steel sheet metal.

Proper procedures will produce tensile strengths of 50,000 psi.

(Rods priced per lb, sold in 10 lb boxes)

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Additional Information

Wire Diameter:
.035" (0.89mm)
Wire Diameter:
.045" (1.14mm)
Wire Diameter:
1/16" (1.6mm)
Wire Diameter:
3/32" (2.4mm)
Pack Size:
10 lb. Pack
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1 Review

  • 5
    Great filler rod use it a ton on my metal are…

    Posted by Thomas P. on Nov 9th 2020

    Great filler rod use it a ton on my metal are great cost compared to other sites

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