4-high cold rolling mill

ANDRITZ high-capacity 4-high reduction rolling mills combine 150 years of experience with outstanding features in cold rolling for carbon steel, stainless steel, and other material.


Product description

The 4-high mill is equipped with positive and negative work roll bending in order to influence the shape and the flatness of the strip. Either the work roll or the back-up roll is driven, depending on customer requirements. The diameter of the 4-high work rolls amounts to approximately 1:4 in relation to the barrel length. This type of rolling mill is mainly used in offline applications for cold rolling of soft and medium strip and for a wide range of strip widths, as well as for break-down rolling in offline applications.

Strengths and benefits of the 4-high cold rolling mill

  • Rolling technology for highest quality standards
  • Proven and sophisticated design, with more than 50 references worldwide
  • Meets the most exacting requirements regarding process technology, reliability, and maintenance
  • Deformation-optimized housing geometry
  • Hydraulic long-stroke cylinders, exchangeable as a complete constructional unit
  • High screw-down speed
  • High control dynamics
  • Mill-fixed work roll bending (Mae West block) – positive and negative
  • Automatic passline adjustment

Corresponding E&A models

  • Strip thickness control
  • Strip flatness control
  • Roll force model (Ford, Ellis, Bland, Hitchcock)
  • Strip temperature model
  • Strip flatness model
  • Pass scheduling program
  • Long-term pass schedule and mill pre-set optimization program

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