Flatstock and Drill Rod Information | G.L. Huyett
Drill rod is not 4140, as this designation applies to SAE steel grades. Drill rod is tool steel, which is referenced by the following grades, per AISI standards: W‑1, O‑1, A‑2, S‑7, D‑2, M‑2, and H‑13. Certain grades of tool steel have similar alloy properties to 4140, but not all tool steel is 4140.
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