Sandvik 13C26 spring temper

J

John L

Joined
Oct 28, 2004
Messages
1,330
Does anyone know the correct heat treat and temper for spring temper for 13C26? The Sandvik charts do not include Rockwell 45-50 or so. I have found out that Paul Bos HT to R48...which would be great but does not help me here for my own heat treating. Thanks.
 
I use 12c27 for springs and I draw it three times starting at 1075 then 1050 and 1025. This gives me a spring close to rc 45. I would think 13c26 should give similar resuts (maybe a point or so harder). You really need to try a few test pieces in your oven because they do vary and at the high tempers 50 degrees can make a big difference.

Jim
 
Thanks very much Jim. I will try those numbers. I cut out 6 slipjoints this morning and was waiting for the spring temper numbers. This really helps a lot. I happen to have quite a bit of 13C26 and wanted to use it. I'll let you know how they work out tomorrow.
 
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