ERCuSi-A Silicon Bronze Welding Wire
ERCuSi-A Silicon Bronze Welding Wire APPLICATION
ERCuSi-A Unibraze Silicon Bronze is a copper-based filler metal that contains 3% Silicon and trace amounts of manganese, tin, and zinc. It is used primarily for oxyacetylene welding of copper, copper-silicon, and copper-zinc metals to themselves and to steel. Unibraze Silicon Bronze is excellent for plain or galvanized steel sheet metal as well as other coated steels. It is also used for surfacing areas that are subjected to corrosion. The Oxyacetylene gas flame should be slightly oxidizing. Keep the weld puddle small in order to promote fast solidification and minimize cracking. A high boric acid flux should be used both before and during welding. Preheat is NOT recommended.
ERCuSi-A Silicon Bronze Welding Wire Physical & Mechanical Properties:
Solids-Temperature 910℃Density 8.5kg/dm³ Elongation 40% Liquids-Temperature 1025℃Tensile Strength 330-370N/mm² Brinell Hardness 80HB
ERCuSi-A Silicon Bronze Welding Wire PACKING:
MIG / TIG and 500lb wooden spools products are available.
Preheat / Interpass Recommendations
Preheating copper-base alloys is frequently unnecessary provided section thicknesses are not unusually heavy.
Preheat and interpass temperatures will vary depending on section thickness, selected weld process, and other variables.
ERCuSi-A Silicon Bronze Welding Wire CHEMICAL COMPOSITE(%)
| Standard | ISO24373 | GB/T9460 | BS EN14640 | AWS A5.7 | DIN 1733 |
| Class | Cu6560 | SCu6560 | Cu6560 | C65600 | 2.1461 |
| Alloy | CuSi3Mn1 | CuSi3Mn | CuSi3Mn1 | ERCuSi-A | SG-CuSi3 |
| Cu | bal. | bal. | bal. | bal. | bal. |
| Al | 0.02 | max 0.1 | 0.01 | 0.01 | max 0.01 |
| Fe | 0.5 | max 0.5 | 0.5 | 0.5 | max 0.03 |
| Mn | 0.5-1.5 | max 1.5 | 0.5-1.5 | 1.5 | 0.5-1.5 |
| Ni | – | – | – | – | – |
| P | 0.05 | – | 0.02 | – | max 0.02 |
| Pb | 0.02 | max 0.02 | 0.02 | 0.02 | max 0.2 |
| Si | 2.8-4.0 | 2.8-4.0 | 2.8-4.0 | 2.8-4.0 | 2.8-4.0 |
| Sn | 0.2 | max 1 | 0.2 | 1 | max 0.2 |
| Zn | 0.4 | max 1 | 0.2 | 1 | max 0.2 |
| Other | 0.5 | max 0.5 | 0.4 | 0.5 | max 0.4 |
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