What safety precautions should I follow with cadmium containing filler metals?
Today the potential danger from cadmium oxide fume is widely recognised. The localised extraction of fumes during brazing is now virtually obligatory. The filler metal should never be heated directly with a flame. Indirect heat from the components being joined should be used to melt the filler metal. If cadmium containing filler metals are felt likely to cause a health hazard then use a cadmium free filler metal from the Johnson Matthey Silver-flo range. Full details on exposure levels (OES) are given in the specific Material Safety Data Sheets. These should always be consulted before use of a cadmium bearing brazing filler metal. The use of cadmium containing filler metals is not permitted in the manufacture of food and drink handling equipment, medical instruments, automotive components, electrical and electronic goods. Download the UK Department of Health and Safety Information Sheet Cadmium in Silver Soldering or Brazing – Engineering Sheet No.31 www.hse.gov.uk/pubns/eis31.pdf .
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