flexiblity of tempered O1

On the package label for Sarrett O1
300 - 350 1hr = 62-64 rc
400 - 450 1hr = 58-60 rc
500 - 550 1hr = 48-52 rc

On the Package label for Sandmeyer O1
300 = 63-65 rc
400 = 60-62 rc
500 = 57-59 rc
600 = 55-57 rc
Also have Alro and Timken but were un readable. All the packages also had the chem. make up but there were no noticeable variables in them.
 
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