In addition, the mechanical properties of stainless or acid-resistant steels produce unfavourable chips that tend to stick and jam. The high toughness leads to a very heavy cutting load especially when drilling and when producing threads. When machining stainless or acid-resistant steels, the following properties should be noted: These materials tend to work harden, are very poor conductors of heat and display a high toughness and shear elongation. The range of application of austenitic steels is the food industry, power plants and energy supply, ship building and the petrochemical industry, but increasingly also applications in architecture for wall cladding and roofing. Next to chromium, nickel is the most important constituent of the structure often molybdenum is also added to optimise the mechanical characteristics. Most stainless steels are from the austenitic group of steels. The chromium creates a micro oxygen diffusing chromium dioxide coating on the surface, that prevents in-depth corrosion. Stainless or acid-resistant steels have a very high chromium content > 12 %, an excellent resistance against chemically aggressive substances and corrosion.
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