ROUND DIA
Small Dia 5mm to 63 mm
Medium Dia: 65 mm to 160 mm
Large Dia: 165mm to 350 mm
INTRODUCTION OF HSS In todays World – for modern industrial production, particularly on mechanical & CNC mass production, tooling is one of the key factors pertaining for the performance of shaping and forming processes. Almost all tools employed for this purpose are made from high speed steels. The use of high speed steels has also gained increasing importance for chipless shaping, eg. for extrusion, blanking and punching tools.HSS chemical composition distinctly differentiates between W-, Mo- and W-Mo alloyed steel grades, which contain different amounts of carbon, vanadium and cobalt elements to strengthen its own occurrence. Characteristic properties HSS GRADES

• working hardness
• High wear resistance
• High retention of hardness and red hardness

Excellent toughness ALLOYING ELEMENTS PRESENT IN HSS PROPERTIES

• Carbon: forms carbides, increases wear resistance, is responsible for the basic matrix hardness.
• Tungsten and molybdenum: improve red hardness, retention of hardness and high temperature strength of the matrix, form special carbides of great hardness.
• Vanadium: forms special carbides of supreme hardness, increases high temperature wear resistance, retention of hardness and high temperature strength of the matrix.
• Chromium: promotes depth hardening, produces readily soluble carbides.
• Cobalt: improves red hardness and retention of hardness of the matrix