picked up some lead alloy, need identification

DavidAGO · January 3, 2012, 11:46 PM

I picked up some bars of lead alloy a few weeks ago while cleaning out an old garage. some of the bars are marked "National Lead 666", a few are marked MF 50/50, and some Kester 30/70. I did google and found the 666 was 39% tin, 1% antimony, and 66% lead. I could not find anything about he others, I assume the 50/50 is half lead half tin? What is the 30/70? 30 tin, 70 lead?

Any help is appreciated.

DavidAGO

IllinoisCoyoteHunter · January 3, 2012, 11:58 PM

From my research Kester is a solder company. I would guess your assumptions are correct, but with one little correction in your math:

National lead's 666 alloy was 39% tin, 1% antimony, and 60% lead

But we knew what ya meant

Did you find any 111 markings on the 50/50 stamped bars. Supposedly that was National lead's marking for their 50/50 alloy (lead to tin)?

dahermit · January 6, 2012, 08:55 PM

30/70 (30% tin, 70% lead), was the alloy used in the early 60's to fill car bodies (pre-bondo), to make "lead sleds".

January 3, 2012, 11:46 PM	#1
DavidAGO Senior Member Join Date: October 7, 2008 Location: Magnolia, AR Posts: 109	picked up some lead alloy, need identification I picked up some bars of lead alloy a few weeks ago while cleaning out an old garage. some of the bars are marked "National Lead 666", a few are marked MF 50/50, and some Kester 30/70. I did google and found the 666 was 39% tin, 1% antimony, and 66% lead. I could not find anything about he others, I assume the 50/50 is half lead half tin? What is the 30/70? 30 tin, 70 lead? Any help is appreciated. DavidAGO

January 3, 2012, 11:58 PM	#2
IllinoisCoyoteHunter Senior Member Join Date: December 23, 2008 Location: Southern Illinois Posts: 1,487	From my research Kester is a solder company. I would guess your assumptions are correct, but with one little correction in your math: National lead's 666 alloy was 39% tin, 1% antimony, and 60% lead But we knew what ya meant Did you find any 111 markings on the 50/50 stamped bars. Supposedly that was National lead's marking for their 50/50 alloy (lead to tin)? __________________ ~~IllinoisCoyoteHunter~~ ~NRA LIFE MEMBER~ ~NRA CERTIFIED INSTRUCTOR~

January 6, 2012, 08:55 PM	#3
dahermit Senior Member Join Date: October 28, 2006 Location: South Central Michigan...near Ohio, Indiana. Posts: 2,612	30/70 (30% tin, 70% lead), was the alloy used in the early 60's to fill car bodies (pre-bondo), to make "lead sleds". __________________ Not often mentioned by Christians: Numbers 31:17-18