Just had this conversation today. I think most people think SAC305 when they think Pb-free. But, SnBi is also Pb-free. Quite a difference in melting point. 
If you are thinking this way, about 220 celsius. SnBi, about 140 celsius. I say about because I like a little silver added for mechanical performance. 


-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of David Hillman
Sent: Wednesday, February 04, 2015 12:08 PM
To: [log in to unmask]
Subject: Re: [TN] LF Solder melting point

What alloy are you interested in?

Dave Hillman
Rockwell Collins
[log in to unmask]

On Wed, Feb 4, 2015 at 11:05 AM, Victor Hernandez < [log in to unmask]> wrote:

> Fellow TechNetters:
>
>    At what temperature does LF solder began to melt?
>
> Victor,
>
>
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