[unclebilly]

So the blades are good up to about 40RC. This covers all mild steel and carbon steel to about 145,000 ksi yield strength.

An abrasive chop saw will cut hardened steel whereas a cold cut saw will not. We made 1000s of cut with ours cutting coiled tubing and structural steel and it always was awesome until some dingus decided to cut a nitrided or carburizing piece in it. If you need to cut hardened studs, you still need an abrasive saw.