Walter has introduced two new Tiger·tec Gold MT-TiCN-CVD turning grades, WMP20G and WMP30G, for machining stainless steel materials. The new grades are designed to address demand for stainless steel components across industries including offshore, oil and gas, food manufacturing, defence, chemical and energy.
WMP20G is positioned as a universal grade for conventional ISO M applications. Its hardness makes it suitable for high cutting speeds and mass production, with a focus on productivity and tool life when machining austenitic, ferritic, martensitic and duplex materials. The tougher WMP30G grade is designed for applications where reliability is a priority, particularly when machining large and expensive components or during single-part production. Walter cites the machining of weld seams in armour plating as one example of its application.
The most significant special feature lies in the new gradient Substrate: thanks to localised cobalt insertions, it is particularly tough at the cutting edge but hard at the core. This protects the cutting edge from chip impact and helps to minimise fractures. Added to this is a double post-treatment of the cutting edge, which reduces friction. This completely new type of indexable insert design is rounded off by a Tiger·tec® Gold coating specially adapted for ISO M machining, as well as the stable RM7 roughing geometry. This is particularly suitable for machining forged parts or for standard geometries that are prone to fractures when turning against a shoulder. Together, they form a solution package that is unique on the market to date, offering the highest levels of reliability and Wear resistance and suitable for use across the entire range of stainless steels right through to carbon steel.