What is the tempering temperature for D2 steel??????

[Kid Couteau]

Hi

I have a lot of planer blades that I would like to use but they are too hard. I don't want to anneal them just temper them back some.
Does anyone know the right heat to get around 55 rockwell on this steel?

Thanks in advance

Knifesmith

 

[Seabourn]

Try this site........http://www.cintool.com/D2.htm