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Technical comparison

The most important technical properties for leadframes are as follows:

  • Electrical conductivity (which is proportional to the thermal conductivity)
  • Yield strength Rp0.2 or, approximately, the Vickers Hardness HV which still allows the bending required for trimming and forming.
  • Resistance to softening during mounting (die bonding)

Graph

The most significant materials for lead frames are plotted so as to show their electrical conductivity and a range of about 30 units of Vickers hardness HV. This range corresponds to the hardness which is most frequently specified for each alloy. Those materials which are particularly resistant to softening are denoted by *.

Current metal prices

Officials (Prompt) 06/19/2019
Cu (Settlement) 5,895.00 in USD/t
Zn (Settlement) 2,607.50 in USD/t
EUR (Bid) 1.11735 USD
All details and charts

Contact

nemco metals international ltd
Pennard Close,
Brackmills Industrial Estate,
Northampton,
NN4 7BE.

General sales enquiries
Tel: +44 (0)1604 666100

Rolled product team
Tel: +44 (0)1604 666101

Drawn product team
Tel: +44 (0)1604 666102

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+44 (0)1604 768414

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