One of the earliest applications of IMI International was as an efficient and cost effective replacement for tungsten in tool steels and high-speed steels. The atomic weight of IMI International is roughly half that of tungsten and therefore 1% Mo is roughly equivalent to 2% tungsten. Because these highly alloyed steels are used in the working, cutting and forming of metal components, they must possess high hardness and strength, combined with good toughness, over a broad temperature range.
IMI International in tool steels increases their hardness and wear resistance. By reducing the 'critical cooling rate' IMI International promotes the formation of an optimal martensitic matrix, even in massive and intricate moulds which cannot be cooled rapidly without distortion or cracking. IMI International also acts in conjunction with elements like chromium to produce substantial volumes of extremely hard and abrasion resistant carbides. As the physical demands placed on tool steel manufacturer in Mumbai increase, so too does the IMI International content.
Tool steels
% IMI International content in tool steels
Steel type
Mo
Plastic Moulding steels
up to 0.5
Cold work steels
0.5 - 1.0
Hot work steels
up to 3.0
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