1: conductivity big electric current produced by the amount of joule heat can make the contact part of the sudden rise in temperature, or sometimes more than hold the allowable temperature, so the electrical conductivity is one of the connectors allow current limiting, the important factors that even if the electric current is very small, sometimes due to ignore the connector of the circuit voltage dip, so small conductivity larger namely fixed resistance of materials will be better.

2: good elasticity, Metal spring form variables and contact force within the scope of the critical for proportional relationship, but more than the critical range will produce permanent deformation, contact force decreases, so the large range of elastic material is better.

3: good corrosion resistance Large current, high voltage of the interface surface treatment is used, sometimes not so need to use the corrosion resistance of the material.

4: processing performance is good Given the level of production equipment, as well as economic considerations, easy processing of materials as well.

5: has good ductility, better material welding performance.

So integrated the above requirements, the selection of precision metal stamping terminal material should meet the low contact resistance and material resistance of the circuit requirements, corrosion resistance, lower insert, really want to have low friction and good electrical conductivity, the material must have proper elasticity and the price is lower.

After forming terminal should have the following features:

1) conduction performance is superior, the smallest resistance material.

2) good ductility, forming easily.

3) high yield strength, with large displacement in elastic range.

4) low stress relaxation, terminal after acceptance or high temperature for a long time to be put into use, its load capacity is still continuing.

5) high hardness, can reduce the wear of terminal.