C carbon Si Si Cr Mo V Cr Mn Mn Mo V S sulfur with excellent stability advantages of excellent corrosion resistance when fine polishing of optical excellent abrasion resistance excellent machinability quench 0.40 0.80 13.50 0.50 0.60 0.20 0.03 compared lower maintenance costs Die after long-term use, the original cavity surface remains smooth state. When mold operation or stored in a humid environment, you do not need special protection. Lower production costs due to the mold cooling water from corrosion of (not as common tool steel), thermal conductivity, cooling efficiency remained stable during the lifetime of the mold to ensure the constancy of the forming die time. STAVAX ESR (S-136) is recommended for all molds, because of their special properties, more suitable for the needs of specific environments. Steel use for a variety of plastic products mold, is more suitable for the special requirements of the mold is suited for making molds used in weakly acidic and humid environment is suited for transparent plastic products mold, such as CD-ROM, optical instruments.