stainless steel fasteners for high current terminations
stainless steel fasteners for high current terminations
(OP)
There is a theory that stainless steel fasteners should not be used in high current (15A+) wire terminations, for example attaching a crimped ring terminal to the stainless steel PEM nut installed into PCB or using a stainless steel screw. True or false?
Thanks.
Thanks.






RE: stainless steel fasteners for high current terminations
Considering this answer to your question in FALSE
RE: stainless steel fasteners for high current terminations
RE: stainless steel fasteners for high current terminations
The actual junction was: brass (ring terminal) - stainless PEM - copper trace.
RE: stainless steel fasteners for high current terminations
SS --> 0.6 to 0.7 micro ohm.meter
Structural steel---> 0.15 to 0.3 micro ohm.meter
Brass--> 0.05 to 0.07 micro ohm.meter
You can see the difference in the resistivity and evaluate the effect on heating of the current carrying path. In any case the resistance of the joint will contribute maximum to heating. The resistance of the meatl will be comparatively insignificant. Hence you may have to concentrate on the quality of the contact joint at current transfer point.
RE: stainless steel fasteners for high current terminations
In high current joints non magnetic (AISI 304 ,314)stainless steel fasteners are used to avoid overheating of the same .If magnetic bolts are used in such location the same will get heated due to stray losses generated in it from the magnetic field generated from the bus bar.In this case fasteners are not carrying any current but get heated up from the magnetic field.
RE: stainless steel fasteners for high current terminations
Efraim