Hello All;   Coming from a large steel plant where the make mostly sheeth metal from recycled steel, they dropped off 3 bars of this weird block of steel.  Each bar is about 3 m long and weighs a ridiculous amount. 10 cm or 4 inch square with a groove on one side. I'm cutting them up in the driveway where they dropped them off All sides are machined , but only one side is hardened - the side under the ruler (looks like case hardening). Bandsaw cannot cut through the last hal