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Soldering Preparation


Materials and aids should be clean, and particularly free of any grease, to ensure proper application. When soldering and plating, adequate ventilation is essential. In addition, it is recommended that protective eyewear and protective gloves are worn in line with the manufacturer’s safety information sheets. Wearing protective gloves also prevents aids from getting dirty.


Selecting the optimum solder and flux

When selecting solder, the working temperatures and flow characteristics are particularly important. Solder is available from various manufacturers in wire form, with or without a flux core, as a paste and as pellets.

Only soldering alloys with a working temperature up to 280 °C (536 °F) should be used for soldering Cupchains. The higher the working temperature of the solder material used, the more precise workmanship and exact temperature control are necessary to avoid damaging the crystal and the foiling.

When soldering Cupchains, solder wire with a flux core is more suitable. If solder pellets are being processed, or the wire used does not have a flux core, the flux should be adapted according to the solder manufacturer’s instructions, while any corrosive effects on the foiling should be checked via pre-testing. These effects should be assessed after plating, as damage done during soldering is often only visible at this point.

For soldering Cupchains we suggest using one of the following lead-free solder wires:

NAMECOMPOSITIONMELTING RANGESUPPLIER
Envirosafe96.5% Sn, 3.45% Cu,
1% Sb, 0.05% Ag
215 – 220 °C
419 – 428 °F
www.sra-solder.com
Silox 22799% Sn, 1% Cu227 °C
440 °F
www.oegussa.at