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Old 09-15-2010, 01:47 PM   #1
Brett74
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Default power supply posts out Stainless bolts vs copper ?

I am building a big power supply system for my chargers and need some bolts probably 10mm, going through the enclosure to some copper distribution strips 5mm thick 20mm wide, what materials should these bolts be made out of, they will see 100 amps at the most, do I need copper bolts or can I use steel bolts ? Is stainless better than mild steel ?
Any advice as far as electrical conductivity of diff material bolts is welcome.
Brett
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Old 09-15-2010, 03:04 PM   #2
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Brett, Just off the top of my head I would say use copper.
But if you use steel I would use stainless steel. That way it will not rust.
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Old 09-15-2010, 03:10 PM   #3
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Any good sources for copper bolts then ?
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Old 09-15-2010, 03:19 PM   #4
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You have to worry about electrolysis effects from high currents and dissimilar metals so I'd don't think I'd use stainless (which has iron content). In my opinion, your best bet would be brass which is more available, more durable, and very compatible with copper.
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Old 09-15-2010, 04:49 PM   #5
azheliguy
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Brass is a good idea.
I found some at McMaster-carr

http://www.mcmaster.com/#cap-screws/=8v1jvu
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