I hear that!
I have been told by a Shihl rep (about 20 years ago) that Stihl is the only one that draws the hardness back to keep the cutter - harder on the out-side,,,,, to aid in a wear - self sharpining effect. (along with hard chrome)
I would bet that Stihl and Carlton cutters and DL links are 5160,,,,, second guess would be O-1 0r O-2?
Paul
Is there a change that you would know were there is a stack of some 5180 ?
I stumbled into a couple samples, and love the stuff!
Also, cured my hot-punching problim by getting some S-7 ,,,,, air-hardened a sample from 1650 - 1700 and baked @ 550 for a couple hours,,,, plays hell with belts (my best guess,,,, 58 rockwell?) but now I dont work the steel so hot,,,,, 500 - 600 (no color in daylight) and punch holes all day long!
Also need some H-13 for a new idea!
Thanks for your help!
Kevin