What temp to temper 5160 for sping material

[wilhurley]

Hey guys, I know this has prob already been asked, I cannot ever get the search to work for me, (must be gremlins). I want to temper 5160 after heat treat to use for folder spring material. What would be a good temp for this ( for example 600degrees for 2 hrs) Thanks
Wil

 

[Gossman Knives]

Not to hijack your thread Will but i was wondering about spring tempering O1, if possible for folder springs.
Scott

 

[Robert Mayo]

In my opinion i think that for both steels if you go between 620f and 640 you should nail it. A little past blue into grey.
Bob