NIPPON KOSHUHA STEEL CO., LTD.

The KPMAX is Hs30-type general-purpose steel for plastic molds with well-balanced characteristics needed for mold manufacturing and product forming.

KPMAXの特長

1.Superior machinability 　●Reduces the total machining time of molds by 20%～50% in comparison with JIS S55C.
2.Stable and uniform hardness through to the center 　●Improved hardening characteristics in comparison with JIS S55C offers uniform hardness through to the center.
3.Superior welding reparability 　●Smaller HAZ hardness than JIS S55C offers easy cutting and grinding after repair work.
4.Satisfactory drawing machinability and mirror finish surface 　●Uniform structure and hardness ensures the drawing machinability and mirror finish surface equal or superior to JIS S55C.

Applications		Position of KPMAX

●General-purpose large-size parts ●Car parts ●Household appliances ●Steel for plastic molds for general miscellaneous goods

Machinability		Hardness of cross section

Tool wear, 50% of S55C		Uniform hardness through to the center

Welding performance		Mechanical characteristics

Small hardness increase in welded portion		Tensile characteristics (room temperature)

Physical characteristics