8407 Features 
 8407 is a chromium, molybdenum, vanadium alloy tool steel, special steel-making technology and the use of strict quality control and organization to get the high purity fine steel, 8407 the isotropic (isotropic) than the conventional refining of the H13 better . This mold resistance to mechanical fatigue and thermal stress fatigue properties more valuable, such as die-casting molds, forging dies and extrusion tooling. So a 8407 mold hardness increase than ordinary H13 1-2HRC without sacrificing toughness. Hardness can reduce the occurrence of thermal cracking, to improve die life. 
 Advantage 
 ? Excellent thermal shock and anti-cracking ability of high-temperature strength or small size, high toughness and ductility and isotropic processing and polishing of fine good hardenability good thermal dimensional stability 
 Components 
 Tin-lead-zinc alloy aluminum alloy HRC HRC HRC copper alloy die-casting mold 46-50 42-48 (QRO-90 S) inserts 46-52 44-48 (QRO-90 S) core, mold 46-5244-- 48 (QRO-90 S) gates 48-52 46-48 (QRO-90 S) nozzles 35-42 42-48 (QRO-90 S) thimble (nitrogen) 46-50 46-5046-50 plunger , sleeve 42-46 42-48 (QRO-90 S) hardening temperature ℃ 1020 1020 1050 
 Main purpose 
 8407 is mainly used for metal casting molds, extrusion dies, plastic molds of high quality requirements, such as: engine dies, molds and other auto lights. 8407 mold steel chemical composition (chemical composition): 8407 carbon steel mold (C) 0.38 , chromium (Cr) 5.3, manganese (Mn) 0.4, molybdenum (MO) 1.3, silicon (Si) 1.0, vanadium (V) 0.9. 8407 heat treatment, quenching and grinding technology 
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