Most all shearblade I build, I use A2 tool steel, some S7 and some D2.
I find when shearing is done under severe circumstances, like wrong clearance setting, lose knife, cut most sizes, cut when shear is dull, guys half asleep.....and so on, is best not to harden too hard!...usually 52 to 54 RC is best, otherwise it will chip at 60RC.most definitely.
Konrad |