"Jim Wilkins" wrote in message
...
"Bob La Londe" wrote in message
...
I've got a piece of mystery steel about 2' x 6' x .78". It was given to
me by a friend when he was moving. I have a couple projects for it that
are going to require machining. What would be the best guess for the
alloy to machine conservatively but without killing cutters? A36? 1018?

I check scrap steel with an old file or hacksaw blade before risking a
bandsaw blade on it. You can calibrate your touch by filing 4130 or O-1 or
whatever else you have that requires extra care to machine.
jsw

I do have some O-1 left from a punch project I can use for comparison. I
also have some known 1018 round bar I can compare to.

~~

It notches easier than 1018 with a file test. I checked three edges to make
sure I did not have a hard spot or a soft spot.


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