GEN C189 Overview
Deoxidized Copper is a filler metal containing 98% copper and small amounts of phosphorus and silicon. The C189 alloy is easy flowing and produces weld deposits that are porosity free, electrically conductive, and copper-color matched. C189 is used to repair weld copper castings, to weld galvanized steel and deoxidized copper to mild steel where high strength joints are not required. (Specification AWS A5.7 / ASME SFA 5.7 Class ERCu)
AWS Chemical Composition (Typical)
| %Cu | %Sn | %Mn | %Si |
|---|---|---|---|
| 98.0 min. | 1.0 max. | 0.50 max. | 0.50 max. |
| %P | %Pb | %Al | Total Others |
|---|---|---|---|
| 0.15 max. | 0.02 max. | 0.01 | 0.50 max. |
Typical Weld Metal Mechanical Properties
| Tensile Strength | 25,000 psi min. |
| Elongation | 28% |
| Electrical Conductivity | 30% (of IACS) |
Typical Welding Parameters
| Process | Diameter | Voltage | Amperage | Gas/Flux |
|---|---|---|---|---|
| TIG (GTAW) | 1/16โ 1.6 mm |
Electrode Negative (DCEN) |
70 โ 150 | 100% Ar |
| 3/32โ 2.4 mm | 150 โ 200 | 100% Ar | ||
| 1/8โ 3.2 mm | 230 โ 390 | 100% Ar | ||
| MIG (GMAW) | .035โ 0.9 mm | 23 โ 26 | 145 โ 185 | 75% Ar โ 25% He |
| .045โ 1.1 mm | 26 โ 29 | 195 โ 225 | 75% Ar โ 25% He |