JMS ENGINEERING CO.,LTD.

S70

The Super 70 is a new type of steel developed through multiple recursive analyses of Nippon Koshuha’s long experience in the high-speed steel industry and users, evaluations via a computer.

Features of S70

Hardened at temperature below 1200℃ to obtain the maximum hardness of HRC70 as the soluble high-speed steel. Appropriate component design ensures finer structure and well-balanced hardness and tenacity. Almost the same machinability as that of the steels currently in use.

Applications		Position of S70
Forming tools Very hard rolls (Sendzimir work rolls) Punches with service lives as long as cemented carbide tools (such as counter punches and canning punches).

Tenacity

Wear-resistance		Hardness and softening resistance at high temperature
Good wear-resistance due to superior hardness		Maintains high hardness even at high temperatures and offers superior softening resistance.

Machinability		Physical characteristics
Less VC carbide deteriorating the machinability and fine primary carbide offer superior machinability even though being very hard.

Thermal processing characteristics