Is there a way to increase the hardness of A286 (or SUH660) steel above 34HRC?

We are trying to manufacture fasteners made of A286 steel. The fasteners were forged and solid solution treated at 900oC for 2.5hours followed by 680, 720, or 740oC aging for 16hours, which is...

09 September 2014 2,262 18 View