"sticky" stannol HS10...

[mcinque]

I've used Multicore 60/40 for almost 10 years without any issues. As you know, it's Sn/Pb based and have rosin flux at 5% at 3%.

I've got the bad idea to try the well known HS10 by Stannol. Same melting point, same Sn/Pb ratio; it have only 2.5% of rosin flux but I thought this wouldn't be a problem.

Well, now that I've tried, it seems that the HS10 behaves basically like a solder wire without flux or a solder that has been heated for too long (with all the flux burned): it tends to be sticked to the iron tip and to create sharp points when I lift the iron tip. Awful.

Sometimes it seem that I began to solder this week.

With the multicore, my iron tip never had much tin on it (all the tin is transferred to the solder joint), with HS10 I have always a drop of solder sticked to the tip.

How can I have so much difference between this two solder wires?

Any of you use HS10?

[bktemp]

I am using HS10 for some time. I can not confirm your experience. I would even say it has some rather strong flux in it. It leaves nasty brown/black residues on the board.

I think there is something wrong with your solder wire. Try to skip a meter or two, maybe there is a small part with missing flux.