About em38 for Pre-hardened tool steel with high hardness (350-410hb). High hardness, wear resistance and compressive depression improves the ability to improve die life. em38 through the casting process to produce micro-alloy steel, steel, sulfur content and inclusion content is very low, resulting in excellent quality steel. Advantages of a good polishing and photo-etching properties of two excellent mechanical processing performance 3 high purity and excellent homogeneous isotropic 4 5 Excellent hardness and toughness Note: em38 100% ultrasonic testing. Factory state standards: hardness after quenching and tempering 350-410hb identification color: green is suitable for the following applications a thermoplastic injection molds thermoplastic extrusion die 2 3 4 rubber mold and blow mold relatively standard features - factory state and Pre-hardened hardness to hb350-410 main chemical composition analysis results (%) special alloy composition characteristics of a good polishing and tactile embossing, excellent emergency spark machining and machining properties, hardness uniform use of thermoplastic injection molding and extrusion molding injection , hardened rubber mold temperature - Cooling - em38 for Pre-hardened tool steel with high hardness (350-410hb). High hardness, wear resistance and compressive depression improves the ability to improve die life. em38 through the casting process to produce micro-alloy steel, steel, sulfur content and inclusion content is very low, resulting in excellent quality steel