General
The rapid development in the high-tech area is putting higher and higher demands on the tool steel. Surface finishes, which have not been possible to achieve with ordinary tool steels, are required. For these extreme requirements Uddeholm Polmax is the right choice.

New processes have been developed to meet the increased demands on surface finish. For Uddeholm Polmax methods like ESR (Electro Slag Remelting) and VAR (Vacuum Arc Remelting) are used in order to reduce inclusion levels to minimum amounts.

Polmax possesses the follwing properties:

• Excellent polishability

• Good corrosion resistance

• Good wear resistance

• Good machinability

• Good dimensional stability during heat treatment

Applications
Examples on applications where extreme surface finishes are required:

• Lens moulds

• Moulds for CD, DVD and memory discs

• Moulds for medical applications