Skin-Pass Mill


Excellent flatness and a perfect finish.

The advantages of skin-pass mills (temper mills) from Primetals Technologies include full compliance with tight strip elongation tolerances, excellent flatness performance, high surface quality, and the availability of wet and dry skin-passing modes. Primetals Technologies supplies stand-alone and inline skin-pass mills in either single or two-stand design for adjusting the final mechanical properties, flatness, and surface finish of strip. Thanks to its higher flatness control ability, 6-high Universal Crown Control Mill (UC-MILL) is the preferred skin-pass mill solution for meeting the continually increasing demands placed on strip flatness, elongation, and roughness, especially for hard-material grades.

Excellent flatness and perfect finish for High-Strength Steel

In addition to a single skin-pass mill in single direction, Primetals Technologies supplies two mill stands temper mill, which includes DCR (Double Cold Reduction) mills with two or even three mill stands for harder tin materials. Single or double-stand Skin-Pass Mills are placed in-line at the exit of continuous annealing and continuous galvanizing lines. 6-high UC-MILLs are supplied in response to recent requirements to roll harder material, such as hard tin plate and AHSS, with improved strip flatness control capability.

Main benefits:

  • Tight strip elongation tolerances
  • Excellent flatness performance
  • High surface quality (roughness, peak count, low residuals)
  • Wet and dry skin-passing modes
  • High-speed roll changing
  • Stable rolling


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Complete automation and process control for Skin Pass Mills

Plant productivity and product quality are substantially depending on the quality of plant automation, process control, and available process optimization functions. To get the best performance out of a plant, Primetals Technologies provides add-on specific optimization solutions for further improvement of production efficiency and strip quality, besides standardized high performance automation system.

Inline Process Quality Insurances

  • Strip defects follow-up with preventive defects passing strategy
  • Accurate roughness and elongation controls
  • Flatness Expert - Model-based Automatic Flatness Control
  • Automatic Coiling tension distribution

Final Product Quality Certification

  • Process data recording
  • Product classification report

Integrated Plant Safety Control System


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Get striking results with incremental investments

NameShort Description
Roll Eccentricity Expert Elimination of a known strip thickness quality disturbance from rolls
Modular Coil Shuttle System (MCS) Rail-based, fully automated modular coil transport system
PropertyMon Inline measurement of steel strip properties
TorqueMon Inline measurement of roll spindle torque for rolling mills
Position Transducer Position measurement of rolling mill hydraulic capsule
Upgrade to Double Cold Reduction Mill (DCR) Double cold reduction process for Temper Mill

Lifecycle Services — improve performance while reducing costs

Service and support from a single source – fast, experienced, reliable

As your lifecycle partner, we provide you with comprehensive operational support, which helps you operate your plant at the lowest cost possible. Our portfolio includes maintenance and repair services as well as the fast delivery of original manufacturer components, produced in-house according to the highest standards of quality.

We fully integrate maintenance organizations into our customers’ organizations, thereby proving what it means to be a true lifecycle partner. The result of this win-win relationship between steel plant operators and Primetals Technologies is continuous improvement in equipment performance, product quality, and total cost of ownership.

Our customers can rely on fast and uncomplicated support in the event of an unexpected component breakdown, wherever their facility may be located. Backed by global resources and a worldwide supplier chain, we can promptly provide you with top-quality original spare and wear parts at competitive prices. We keep a range of key parts in stock to ensure their fast availability.

Want to know more? Go to Primetals Technologies Lifecycle Services Site

Reference Story: UC-MILL to achieve excellent strip shape for high strength steel without tension leveler

Guangzhou JFE Steel Sheet Co., Ltd., China

Type of plant:
In-line Skin-Pass Mill for Continuous Annealing Line to produce HSS for automotive application

Technical Data:
Strip Thickness: 0.30 ~ 2.6 mm
Strip Width : 800 mm~1,880 mm
Mill Type : 6-high UC-MILL

Our solution:
The 6-high UC-MILL was installed to enhance the customer's product portfolio which now includes harder materials up to 1180 MPa HSS. The mill is capable of rolling such high-demand materials in wide width range and into excellent strip shape without tension leveler, to boost the plant's competitiveness.

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