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62sn 36pb 2 solder

Views: 1273

#56412

62sn 36pb 2 solder | 9 September, 2008

What is this? I thought 63sn 37pb was the norm. What is with the 2 at the end? Anyone know?

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#56413

62sn 36pb 2 solder | 9 September, 2008

Silver (Ag). It's a typical composition

Regards,

Vlad

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#56420

62sn 36pb 2 solder | 9 September, 2008

Logannsan,

you may want to check into this a little more with your customer to find out what 2 is.

It could be as Vlad say's 2Ag -silver, or it could be 2CU -copper or 2Ni- nickel.

Also check this form for 62Sn 36Pb 2Ag

just my 2 cent.

Regards,

Boardhouse

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#56421

62sn 36pb 2 solder | 9 September, 2008

As far as I know, they rarely do it with Pb-bassed solders. Pb-free may contain Cu or Ni (to improve test performance)

Vlad

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#56454

62sn 36pb 2 solder | 10 September, 2008

Actually it's not rare. I use several pastes from various manufacturers that add 2% silver in their leaded pastes. I would bet it's 2% silver.

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#56455

62sn 36pb 2 solder | 10 September, 2008

Isn't that the non-eutectic one that provides the pasty phase range that people use to clobber their tombstoning problems?

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#56456

62sn 36pb 2 solder | 10 September, 2008

That is exactly what I said. Rarely belongs to Cu or Ni :-)

Vlad

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#56459

62sn 36pb 2 solder | 10 September, 2008

Strange we use the 179~C eutectic 62/36/2 solder paste as standard in Europe. It is indeed 2% Ag in fact we dont sell 63/37 paste or very rarely. I think if you mix a little 60/40 powder with the 2% Ag alloy this overcomes the tombstoning problem.

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#56462

62sn 36pb 2 solder | 11 September, 2008

The 2 % is Ag.It is added to prevent leaching silver from the end caps of components.This alloy like 63/37 is eutectic and has a reflow temp of 179�C whereas 63/37 is 183�C.

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