Tool Steel O1 Drill Rod, Oil Hardening - Buy Online
2021-6-28 · Reheat for no less than 1 hour, and up to two hours. O-1 drill rod round is a non-deforming tool steel ground to a tight tolerance diameter, usually ±0.0005 in (±0.013 mm) which can be hardened by heating it, then quenching it in oil.
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