Drill Rod Hardness and Machinability
Drill Rod Hardness and Machinability. Buy Precision Ground Drill Rod Online. The rods are manufactured of annealed tool steel (O-1, A-2, D-2, H-13, S-7, M-2, or W-1). Then they are cold drawn and (usually) polished. The drill rod hardness is affected by the cold drawing manufacturing process.
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