H13 HOT WORK TOOL STEEL

 

 

STRESS RELIEVING

Heat to 650C / 700C.  Hold for 2-4 hours and furnace cool.

 

HARDENING

Before heat treatment, sufficient machining should be carried out to remove
surface decarburisation.
Preheat thoroughly at 750C / 800C and then raise more rapidly to 
1000C / 1020C in a controlled atmosphere furnace or preferably, a neutral salt bath.  Cool in air.  A useful alternative is box hardening using spent charcoal placed away from the working surfaces.