Copper & bronze
FERVEO CUP SI3 MIG
solid wireCatalogue only
also as: TIG rod
AWS class
ER CuSi-A
EN ISO class
S Cu 6560 (CuSi3Mn1)
Hardness
90 HB
Classification
| AWS class | ER CuSi-A |
|---|---|
| EN ISO class | S Cu 6560 (CuSi3Mn1) |
Purpose
- Silicon bronze solid wire (CuSi3Mn1) for joining copper and copper-tin alloys, surfacing on steel, and MIG-brazing of galvanized sheet.
Why it works
Silicon (3%) gives the weld pool fluidity and good low-temperature wetting — hence its characteristic use in MIG-brazing, where low heat input avoids damaging zinc coatings.
Fields of application
- Joining copper and copper-tin alloys.
- Surfacing on cast iron and unalloyed/low-alloy steels.
- MIG-brazing.
Chemical composition
| Element | Typical, % |
|---|---|
| Cu | balance |
| Fe | 0.07 |
| Mn | 1 |
| Si | 3 |
| Sn | 0.1 |
| Zn | 0.1 |
Mechanical properties
| Tensile strength (Rm) | 390 MPa |
|---|---|
| Yield strength (Rp0.2) | 150 MPa |
| Elongation (A5) | 40 % |
| Impact energy (KV) | 60 J |
| Hardness | 90 HB |
Process
| Polarity | DC+ |
|---|---|
| Shielding gas | I1 |
Sizes and part numbers
| Ø | Request |
|---|---|
| 0.8 mm | |
| 1 mm | |
| 1.2 mm | |
| 1.6 mm |
Supply programme
spools D100 / D200 / K200 / K300
Cross-reference
| Replaces MCU Si3 (Magmaweld) | Direct replacement |
| Replaces COPPERFIL CuSi3 (Oerlikon) | Direct replacement |
Equivalence refers to the classification (AWS / EN ISO), not to product identity. In applications with a qualified procedure (WPS), validate the substitution before use.
Advantages
- High ductility (A5 40%) and good toughness (KV 60 J).
- Suitable for MIG-brazing — low heat input, useful on galvanized sheet.
Limitations
- Not suitable for oxy-fuel gas welding.