01-24-2015, 08:45 PM
Ed,
The Ø 1-1/2" 316 stainless came from http://www.onlinemetals.com/, while both the steels came from http://www.speedymetals.com/
For the sale items at Speedymetals.com, click on the red tab for "Fire Sale". not much there but that one seemed a decent deal if you're as comfortable as I am with plowing through that flame cut surface on two sides.
In my photo the square bar closest to the Ø 1" TGP 4140HT is showing the flamecut edge. The other surfaces are the mill scale that can be equally abrasive. I figure they'll easily clean up to about 5/8" square, perhaps a little bigger. I think it's always nice to have a little bit of pre heat treated alloy kicking around for when a project needs a little hardness on the stock. Machining PHT 4140 generally works better with carbide tooling, though HSS works if you're careful and use very conservative cutting speeds.
The Ø 1-1/2" 316 stainless came from http://www.onlinemetals.com/, while both the steels came from http://www.speedymetals.com/
For the sale items at Speedymetals.com, click on the red tab for "Fire Sale". not much there but that one seemed a decent deal if you're as comfortable as I am with plowing through that flame cut surface on two sides.
In my photo the square bar closest to the Ø 1" TGP 4140HT is showing the flamecut edge. The other surfaces are the mill scale that can be equally abrasive. I figure they'll easily clean up to about 5/8" square, perhaps a little bigger. I think it's always nice to have a little bit of pre heat treated alloy kicking around for when a project needs a little hardness on the stock. Machining PHT 4140 generally works better with carbide tooling, though HSS works if you're careful and use very conservative cutting speeds.