We run our selective solder, wave solder, tin pots, robotic tinning cells, etc, at 500 deg. F. All of these contain Sn63, but we do not use lead-free HASL finishes.

Same is true for at least 8 of the other companies I work for, except many of them DO use Pb-free HASL PWBs, including a customized process for HASL application of Kester's KL100D, and another for Nihon Superior's Sn100C.

They have found (repeatedly) that dissolution and visual wetting is optimized at 260-270C for Sn63 solder to almost any Pb-free plating. 

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Robert Kondner
Sent: Friday, May 18, 2012 9:30 AM
To: [log in to unmask]
Subject: Re: [TN] PCB Lead Free with Tin Lead Process

Hi,

  What temperature do folks run there wave machines? I recall using 230 to 260 C on a Tin/Lead machine. (Put running the wave was a past life for me. )

 At 250 C your lead free should reflow just fine. 

Bob.

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Rex Waygood
Sent: Friday, May 18, 2012 2:32 AM
To: [log in to unmask]
Subject: Re: [TN] PCB Lead Free with Tin Lead Process

 You are soldering to the PCB finish you do not melt it. ( think of ENIG )

 You are soldering to the PCB finish you do not NEED to melt it. ( think of ENIG )

:-)

Rex

Sent by me on my iPhone. 


On 17 May 2012, at 13:09, "Juliano Ribeiro" <[log in to unmask]> wrote:

> Hi to all,
> 
> Is it possible we use PCB with finishing HASL (Lead Free) in our Tin Lead Process - Solder Wave?
> We need modify some parameters how the temperature?        
> 
> Thank you a lote
> 
> 
> Juliano Ribeiro
> Coordenador de Produção - Placas Eletrônicas Elo Sistemas Eletrônicos 
> S.A.
> Fone: (51) 2131 2217    Fax: (51) 2131 2200
> Cel: (51) 9356 2844                                                                                                                                                                 
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