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Mold Materials Mold Base Stainless International Mold Steel has started stocking and processing Superplast Stainless from the Industeel division of Arcelor Mittal. Superplast Stainless is ideal for mold bases, holder block, un-etched/unpolished inserts and dies along with other applications where a high polish is not required. The special chemistry, based on low Carbon and 12 percent Chromium content, provides good corrosion resistance in high humidity environments, the company states. Superplast is easily machined: milling, gun drilling, radial drilling and tapping due to its chemical composition, as compared to: W1-2085, W1.2316, and 420 F grades. Features include: pre-hardened (30-35 HRC) 420 F-type material; improved machinability; improved consistency and weldability; and, corrosion resistance. Superplast is not designed for highly polished or textured surfaces. Material is available in plate form, and will be stocked up to 4 1/4". For more information from International Mold Steel of Florence, KY, phone 859-342-6000 or visit imsteel.com; for more information from Industeel of Troy, MI, phone 248736-4490 or visit industeel.info CPM Powder Metal Tool Steel Diehl Steel offers the variety of CPM powder metal tool steel that it stocks and sells. The CPM process produces more highly alloyed grades of steel which cannot be produced by conventional steelmaking, the company says. The process results in a very fine, more uniform carbide distribution and imparts improved toughness and grindability, dimensional stability, as well as outstanding hardness, wear resistance and heat resistance compared with conventional tool steel products. Diehl Steel offers a range of grades to accommodate most applications where powder metal tool steel is required. For more information from Diehl Steel Co. of Cincinnati, OH, phone 513-242-8900 or visit diehlsteel.com High Quality Tooling Materials Stainless mold base steels from Schmolz + Bickenbach USA, Inc. are engineered to be significantly more machinable than other, established mold base steels for plastics processing without suffering any reduction in corrosion resistance, the company states. Analysis of the newly developed Corroplast FM material reveals a wellbalanced ratio of hardness, corrosion resistance and machinability. A particular challenge was to homogenize the steel's structure with the correct proportion of sulphur so as to optimize the machining properties of the specialty prehardened stainless steel without impairing its performance characteristics. To meet this challenge, the melting process and subsequent secondary metallurgic treatment were both carefully adjusted. Furthermore, the possibility of embrittling delta ferrite being formed was minimized through thermodynamic calculations, which resulted in optimal homogeneity of the structure. This homogenous structure ensures that Corroplast FM remains corrosion resistant even in an environment marked by heat, condensation and coolant. It also provides great stability for filigree components and molds with minimal cavity spacing. In addition to PET bottle manufacturers, other users who need complex, corrosion-resistant and easy-to-machine base and build-up plates, mold frames, or extrusion tooling can benefit from this. Corroplast FM is available in rolled and forged plates up to 12 inches 28 MoldMaking Technology July 2013 thick. Upon request, the company will provide six-sided CNC machining and chamfering. For more information from Schmolz + Bickenbach USA, Inc. of Carol Stream, IL, phone 800-323-1233 or visit schmolzbickenbach.us