Posted by clueless [201.237.44.50] on Friday, January 16, 2015 at 16:19:07 :
In Reply to: 4340 vs 300m vs assab 7210m posted by clueless [186.176.19.90] on Friday, January 16, 2015 at 13:09:38 :
thought it would have been harder than than
seemed to be the same hardness as the unsplined area
maybe they did not harden them much in the early days--wonder if the later ones are harder
maybe they could be tempered more on the outside against breakage