Focus On Maxival

Maxival stainless steel offers better machinability than standard grade stainless steels, a longer tool life, higher feed and speed, less machine downtime and fewer rejections.

Maxival Product Image

"The state of the art of improved machinability steels."
EN 1.4306 (BS 304S15) MAXIVAL - EN 1.4404 (316S11) MAXIVAL

The basic idea behind MAXIVAL is the production of an austenitic stainless steel that instead of a high sulphur content and well distributed inclusions which:

  1. Break the chips on machining.
  2. Do not wear nor overheat tools.
  3. Do not weaken the metallic matrix.
  4. Do not create corrosion point.

Produced by Acciaierie Valbruna since the begninning of the Eighties and constantly improved, MAXIVAL is a stainless steel resistiant to corrosion and machanically as strong as the ordinary 304 and 316 but with a much superior machinability.  The advantages offered to a machine shop working with MAXIVAL are:

  1. High cutting parameters-increased cycle times
    (Speed, Feed and Depth)
  2. Extended Tool Life
    (Light ear and infrequent sharpening)
  3. Good chip breaking
    (Easy removal, low machine supervision)

See following comparative tables and diagrams.
MAXIVAL is a World Wide Valbruna Trade Mark 

Comparative Table

GradeConditionHardnessDepth of Cut
(mm)
Speed of cutTool InsertCutting speed up to
collapse of tool
  HB(mm)(mm/rev)(ISO)without TiN
mtrs/min.
without TiN
mtrs/min.
MAXIVAL 304annealed 160 1.5 0.4 P 35 175 135
 hardened 200 1.5 0.4 P 35 150 115
 hardened 240 1.5 0.4 P 35 130 100
AISI 304annealed 160 1.5 0.4 P 35 140 110
 hardened 200 1.5 0.4 P 35 120 95
 hardened 240 1.5 0.4 P 35 105 80
MAXIVAL 316annealed 160 1.5 0.4 P 35 145 110
 hardened 200 1.5 0.4 P 35 125 95
 hardened 240 1.5 0.4 P 35 108 82
AISI 316annealed 160 1.5 0.4 P 35 115 90
 hardened 200 1.5 0.4 P 35 100 80
 hardened 240 1.5 0.4 P 35 88 68