What's in this solder?

[Texxut]

I have a 5 lb spool of solder and am wondering if it is suitable for casting. I use WW and would like to use it to aid in fill out. It is :
Nassau smelting and refining co.
B Stearine core spec-at 7241.

What is the make up of this?

[R.M.]

Have you Goggled it? That's where I'd start.

[Texxut]

I tried that first. The only thing it came up with is, info about the company, nothing about the solder itself.

[375RUGER]

you might want to try and sell it on evilbay. have a look at the prices they want for Nassau solder. Your's might be extremely rare, I didn't see any.

[bumpo628]

I found this info from here: http://www.doityourself.com/forum/welding-metalworking/167252-type-solder.html


Stearine core solder is a type of acid core.
It is also a specialty solder used to solder lead sheaths on underground electrical cable and manufacturing lead acid batteries.
Its make up is 35% tin, 64% lead, 1% antimony and trace arsenic.


Here is another source: http://www.wbparts.com/rfq/3439-00-259-9039.html

CHEMICAL COMPOSITION PERCENTAGE LEAD 63.10 MAX; LEAD 62.75 MIN; TIN 34.75 MAX; TIN 34.25 MIN; BALANCE IS ANTIMONY, ARSENIC AND BRONZE
WIRE CORE TYPE STEARIN


Using the numbers from the first source,
2 oz of solder + 8.5 lbs of Clip On WW = alloy with 1% tin, 3% antimony
4 oz of solder + 8.5 lbs of Clip On WW = alloy with 1.5% tin, 3% antimony
6 oz of solder + 8.5 lbs of Clip On WW = alloy with 2% tin, 3% antimony

Personally, I would just use the first recipe. That way you'll be able to stretch the solder out much farther and you probably don't need any more than 1% tin. At that rate, you can sweeten 340 lbs of WWs.

[375RUGER]

here's something i found interesting.
http://www.gmptools.com/nf/72411.htm
this company had a relationship with Western Electric and Bell. Nassau was a subsidiary of Bell/WE. This solder product carries the same 7421 identifier.

[montana_charlie]

wrong thread ...

[Texxut]

Thanks to all for your input.
Bumpo,
Thanks for the calculator and the info on the solder and formula. I'll try the 2 oz /8.5 lbs first and see how the bullets come out. I'll increase it till I get the results I'm after. I'll report on my success . This is a great site.