GREEN LABEL DRILL ROD is a high-quality, tough, fine-grain, straight-carbon, water-hardening tool steel with a medium hardness penetration. It is supplied with a smooth, decarburization-free surface and can be used with very little machining for applications such as shafts. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on forming, heat treating, and machining. Filing Code: TS-316. Producer or source: Carpenter.