AEB-L (=13c26)
http://www.smt.sandvik.com/sandvik/0140/internet/s001664.nsf/3aa39d675f7cc278c12569b900513b28/78F3E19A46901454C125742800319114/$file/Hardeningguide.pdf?OpenElement
12c27/13c26
http://www.smt.sandvik.com/sandvik/0140/internet/s001664.nsf/3aa39d675f7cc278c12569b900513b28/78F3E19A46901454C125742800319114/$file/Hardeningguide.pdf?OpenElement
Quench at 1800C/1975F and cyro and temper.