Usually the pieces and plates yin and Yang must have very high gloss, hardness, deformation when little heat. The part of this direct contact with plastic and large pressure; Therefore, that the pieces must have a strong high hardness. Want to achieve the shiny mirror and stainless, usually when selecting the material related to the Chromium content of many sheets.The most common materials used for this section is:35CrMo2: good for work, but not good for polishing and engraving.40CrMnMo7: this material is somewhat difficult but easy for machining and polishing as well as carvings.40NiCrMoV4: this is the type used to make pieces or the plate I completely hard.40Cr13: this type of polished and good corrosion resistant, high stiffness achieved heat.
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