A common hardness test done with a round, very hard steel ball which is pressed into the material being tested. The diameter of the mark left in the steel is measured and a table is used to convert this to a Brinell Hardness Number. The higher the number, the harder the steel. See hardness testing.
The Fabricator Blog
A working vacation - by Dan Davis A welding instructor at a Wisconsin vocational school hits the shop floor in the summer to see what matters to manufacturers.
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