I was assuming they didn't want to mash whatever it was to test it
hang on, your suggestion of scratching it with a nail to test surface hardness is EXACTLY the same as my bikepro test, IE different ways of testing surface hardness! except my links to industry standard tests & yours is "scratching it with a nail"
yeh I think my suggestion is a serious suggestion jez
it would probabily help if you told us what the part is?
thats what I was saying if you dont mind damaging it, its pretty easy to test
if you don't want to damage it, its slightly more complex
Its easy in work you just give it to the metalurgists they look at it through their weird scope thing ( technical term
) line up some coloured lines and tell you exactly what it is
Then wait until you've finished welding it and tell you its something else