Free machining stainless steels with better machinability than standard grades 

Free machining stainless steels Austenitic stainless steel Valbruna Stainless Steel

Austenitic Stainless Steel

Machinability
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MACHINING


MACHINING GUIDELINES

Technicians and machining shops are aware of the difficulties involved with machining, and minimize them by observing some general guidelines.
There is no single set of rules that are good for all machining parts, but the most important ones are:

  • Cutting fluid must be selected to provide proper lubrication and heat removal
  • Tooling and fixtures must be sturdy to avoid vibrations
  • Cutting fluid must be directed to the cutting zone in higher flow rate to reduce the overheating
  • Use inserts with positive geometry and increase cutting speed to avoid the built-up edge
  • Because the machined surface is work hardened, tool must work below this zone

All these "troubles" can be greatly reduced by using free machining austenitic stainless steel, but this benefit, obtained by the addition of sulphur ( S = 0.15 - 0.35% ) degrades the following properties:

  • Corrosion resistance
  • weldability
  • cold formability

Therefore, if these characteristic were very important and "mandatory", a right choice must be a compromise whose name is:  MAXIVAL

 










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