I've worked with a few heat treaters. I much prefer Peter's heat treating to all others.
I have lots of stories about Brad at Peters solving problems, correcting others bad heat treating, developing new heat treat recipes for steel companies, etc. The latest story was a heat treater who said we incorrectly marked CPM M4 when they said it was 420HC. The heat treater said they could only get the steel to 52 HRC. The steel was returned to us and we had it tested. The test results said M4. We sent the steel back to the steel company and they tested it twice. Again the test results were M4. We sent the steel to Brad at Peters and asked him to heat treat it as M4. Brad heat treated the steel to HRC 62. The steel was returned to a happy customer.
Our time is worth too much to waste. We must have repeatable, reliable results. The price is irrelevant if the results are flawed. This is why we use and recommend Peters.
Chuck