ID This Brass Gauge Block

[Lionelgee]

Originally Posted by Mike Kelly

Hi Lionel
Yep it appears to be a gauge but the actual use is uncertain. Your guess would be pretty close. It looks to be rather worn and in rough condition, not what I would describe as being high precision. Brass comes in various grades with different % of elements in the alloy, some types are harder.

Hello Mike,

I am glad that you consider the block to be in rough condition. I bought the brass block to use with plug welding rust holes in automotive sheet metal. Am I right in thinking that either brass or copper could be used as a backing when welding up rust holes in sheet metal? I just had a look online and there are some brands of plug welding pliers that feature a copper-plate top jaw.

Of the two options copper or brass - which one is the best option for carrying out plug welds in sheetmetal? Or the two equal to the job?

Kind regards
Lionel