Electronics Forum: copper wiring (Page 1 of 11)

beryllium copper

Electronics Forum | Tue Mar 14 12:56:07 EST 2006 | robhs

Q: Is anyone aware of any solderability issues that may exist when soldering beryllium copper parts (in this case spring contacts) to a PCB using standard Pb63/Sn37 solder paste/wire?

stranded copper wire - tin or not tinned

Electronics Forum | Thu Jan 23 08:08:10 EST 2014 | charliedci

Should stranded copper wire (20 gauge 19 strand) be tinned prior to insertion into screw connector? One of our customers "suggests" tinned, but past experience tells us no.

stranded copper wire - tin or not tinned

Electronics Forum | Thu Jan 23 23:00:42 EST 2014 | davef

I agree with AFlex. Don't tin stranded wire that's assembled into a screw terminal block. I believe the reasoning has to do with avoiding stress on the wire metal caused by different expansion rates of the solder and the wire. BR davef

stranded copper wire - tin or not tinned

Electronics Forum | Thu Jan 23 08:18:07 EST 2014 | aflex

Even for me its a No. Its quiet strange why some preferred tinned ones.

does copper wire become thinner when it dip to leadfree solder?

Electronics Forum | Wed Nov 02 01:24:07 EST 2005 | arnold

we are encountering a problem on our production. after dipping a copper wire AWG#30 to a leadfree solder the wire becom thinner and easily to break. does the leadfree soler has the capability to weaken the wire (lessen the diameter)after dipping to l

does copper wire become thinner when it dip to leadfree solder?

Electronics Forum | Wed Nov 02 21:58:17 EST 2005 | KEN

Copper wire will become thinner when dipped in tin/lead or lead free solder. The copper is disolved off of the bulk wire. This is one reason rework on solder pots must be restricted. Eventually, after repeated cycles you will have smaller and sma

does copper wire become thinner when it dip to leadfree solder?

Electronics Forum | Thu Nov 03 07:22:16 EST 2005 | davef

arnold: I did not say that Sn100 dissolved copper faster. The graph of dissolution rates [from the link above] shows that Sn100 dissolves copper slower than many of the other solders.

does copper wire become thinner when it dip to leadfree solder?

Electronics Forum | Wed Nov 02 03:35:09 EST 2005 | Slaine

I thought it was the tin content that leached the copper so presumed 100Sn would be more aggressive?

does copper wire become thinner when it dip to leadfree solder?

Electronics Forum | Thu Nov 03 04:31:21 EST 2005 | arnold

davef, how can you convince me that 100Sn dissolved copper much faster?

does copper wire become thinner when it dip to leadfree solder?

Electronics Forum | Thu Nov 03 13:35:46 EST 2005 | Amol

the copper forms intermetallics with tin to get Cu3Sn and Cu6Sn5. thus intermetallics formation consumes Cu and depends upon the cooling rate, faster the cooling rate, lesser the intermetallic formation

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