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Use 303 stainless steel alloy instead of 304 and
316 to improve turning and drilling operations

• EXPLANATION The AISI 303 (EN 1.4305) series
  contains S and Mn to improve the machinability of
  the alloy, being this steel included in the group
  known as free-machining stainless steels. These
  elements (S and Mn) lead to the formation of a
  protective layer of MnS on the tool rake face
  where the new formed chip slips out of the edge.
  However, the sulphur addition lowers its
  corrosion resistance below that of Grade 304. In
  303 cutting speeds are higher. Thus in turning,
  when HSS tools are used speeds range from 40 to
  50 m/min, and feeds from 0.17 to 0.23 in the
  case of hard metal tools cutting speeds exceed
  250 m/min. In drilling, with HSS drill bits
  speeds can be from 21 to 30 m/min and feeds up to
  0.18, and when hard metal tools are used speeds
  can vary from 40 to 110 m/min. Some conclusions
  after turning tests -303 steel is clearly the
  easier to be machined, while 304 and 316 show
  similar results and could be considered as
  difficult-to-be machined. - Coolant improved both
  the tool life and part quality. MQL has no big
  advantage with respect to dry turning. -
  Cryogenic treatment has a fine influence on
  workpiece quality, that is, on roughness and part
  dimension.

• CLASSIFICATION
• Topic COOLANT AND LUBRICANT
• Machine Structure -
• Life Cycle phase USAGE
• Type of machine tools LATHE, DRILL
• Material selection STAINLES STEEL

• KEYWORDS stainless steel
• SOURCES Gandarias, A., López de Lacalle, L.N.,
  Aizpitarte, X., Lamikiz, A. High performance
  drilling of austenitic stainless steels
• LINKS
• FIGURES/GRAPHS

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