Solder Powders
| Solder Alloy Systems | |||
|---|---|---|---|
| ALLOY | LIQUIDUS | SOLIDUS | LEAD-FREE |
| Sn42/Bi58 | (E) 138°C | 138°C | Yes |
| Sn95.5/Ag4.0/Cu.5 | 217°C | 219°C | Yes |
| Sn96.5/Ag3.0/Cu.5 | 217°C | 219°C | Yes |
| Sn95.5/Ag3.5 | (E) 221°C | 221°C | Yes |
| Sn95/Sb5 | 240°C | 235°C | Yes |
| In50/Sn50 | 123°C | 120°C | Yes |
| In97/Ag3 | (E) 144°C | 144°C | Yes |
| Note: (E) = Eutectic | |||
| Mesh Size And Micron Size - Conversion Chart | ||||||||
|---|---|---|---|---|---|---|---|---|
| MESH SIZE | 200 mesh | 325 mesh | 400 mesh | 500 mesh | 625 mesh | 800 mesh | 1250 mesh | 2500 mesh |
| MICRON SIZE | 75µm | 45µm | 38µm | 25µm | 20µm | 15µm | 10µm | 5µm |
| Powder Distribution | ||||
|---|---|---|---|---|
| TYPE | MICRON SIZE (µM) | MESH SIZE | OXYGEN CONTENT | |
| 2 | 75-45µm | -200/+325 | <100ppm | |
| 3 | 45-25µm | -325/+500 | <100ppm | |
| 4 | 38-20µm | -400/+625 | <120ppm | |
| 5 | 25-15µm | -500/+800 | <200ppm | |
| 6 | 20-10µm | -625/+1250 | <200ppm | |
| 7 | 10-1µm | -1250 | <220ppm | |
Note: AM&M will provide any alloy powder that a manufacturer chooses to use. However, manufacturers should be cautious that their alloy of choice will not result in potential infringement.
| TYPE | MICRON SIZE (µM) | MESH SIZE | OXYGEN CONTENT |
| 2A | -75 | -200 | <120ppm |
| 3A | -45 | -325 | <120ppm |
| 4A | -38 | -400 | <120ppm |
| 5A | -25 | -500 | <200ppm |
| 6A | -20 | -635 | <200ppm |
| 7A | -10 | -1250 | <220ppm |