This system is intended to machine round tensile specimens in a wide range of metals, and it is rated to work reliably with materials up to 55 HRC.

When you are machining near that upper hardness level, results are most dependent on the cutting tool grade and geometry, the programmed speeds and feeds, and how much stock you are removing to reach the final reduced section. These factors directly affect surface finish, tool life, and repeatability from specimen to specimen.

For best consistency in ASTM E8 and ISO 6892-1 style specimen preparation, it also helps to match your process to the starting bar condition, such as heat treated versus annealed, and to control clamping and concentricity so the reduced section is turned cleanly without chatter.

If you want to confirm the right tooling and setup for your specific alloy and hardness, learn more and request a quote with your material grade, hardness, and specimen geometry.