Hello Dan, It was still a knife in my book. As you could see it still had life in it. The most brutal then I can do is hammer a knife edge into steel. Most break or tear out then the end is near.

But on your Scrapper 6 with so much edge damage. It still was able to shear through the cross section of the steel tubing. The cross section is very tough to get through. It's a curved surface with no starting points. It take major force just to get it started. The Scrapper 6 Did it almost twice. This was the crowning moment for me. SR-77 is some very resilient to damage.

I'm just making a guess because I am not a steel expert but I would think the micro fractures were very shallow and did not continue deep into the steel.

Great stuff Dan.. I'm glad you enjoyed it. I had a blast with it and learned a lot

You know how to work the this steel. Your the man Dan