Bar solder

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  • Last Post 02 June 2025
yamoon posted this 01 June 2025

I have several pounds of bar solder marked SN1F any ideas on the tin content?

Thanks Mike

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Lucky1 posted this 01 June 2025

I was curious and a Google search was bumpkus except for your question on the ASSRA forum. 1F really doesn't fit the normal descriptions so maybe start with some hardness testing for an educated guess?

Scott Ingle

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fc60 posted this 01 June 2025

Greetings,

Perhaps post images of both sides of the bar to help identify?

Cheers,

Dave

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max503 posted this 01 June 2025

If you really want to know:

 

Finding percentage of tin in leaded tin solder

Sciencemadness Discussion Board

https://www.sciencemadness.org/talk/viewthread.php?tid=159539

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Wilderness posted this 02 June 2025

Yamoon - density is always a good test. Tin is about 65% the weight of lead for the same volume.

You can arrive at relative densities by casting something with the mystery alloy and comparing it to the known alloy.

A round ball, as heavy as possible, would be a good candidate since it minimises the error around improperly filled out grease grooves/bands etc.

Cast a ball with pure lead and cast another with your solder (presuming it doesn't solder the mould shut). Compare the weights.

If the solder is 50:50, the weight of the solder ball should be about 83% of the weight of the pure lead ball (half 100 plus half 65). 60% tin would be about 79% and 40% tin would be about 86%.

This assumes that tin and lead in alloy produce a density in line with the individual densities of the metals. In alloy - not sure, suspect a little different, but close.

You are only as good as your library.

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