Drill Rods | McMaster-Carr
2016-5-27 · During the water hardening process, the rod is heated until glowing red then plunged into a vat of water to cool. The result is a hard, durable metal which is easily machined. However, it is not suitable for welding. Water hardened drill rods are used in the manufacturing of hammers and files. Oil Hardened Drill Rods
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