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Cold rolling mills for stainless steel Modernization concepts for a bright future W6-307E_Kalt-Edelstahl v2.qxp_Tandem 26.06.17 12:15 Seite 2

Cold Rolling MillS foR StainleSS Steel

Stainless steel: Brilliant future prospects

Stainless steel is a high-quality material for a large vari- serves to increase chemical resistance, while additions ety of applications. Stainless steel is used everywhere of nickel, molybdenum and aluminum enhance the where resistance to corrosion, aesthetic appearance formability and the resistance to acid and heat. One of and long service life are in demand. the many advantages of stainless steel is that it can also be completely recycled. The following are areas of application for stainless steel: Architecture and facade cladding For the construction of high-rise buildings, use is made Chemicals and petrochemicals increasingly of stainless steel. A good example is the Medical technology and food industry group headquarters of the financial services company, Household goods Goldman Sachs in Manhattan, right in the middle of Vehicle construction New York. The stainless steel cladding for the 228 m Offshore engineering and shipbuilding high building, designed by the US star architects Pei Cobb Freed & Partners, was supplied by former There are currently more than 120 standardized grades ThyssenKrupp Nirosta, Krefeld. of stainless steel which differ in accordance with manu- facture and composition. A higher chrome content

X-Roll® and X-Pro® designate the family of brands from our Hot Rolling Mills and Cold Rolling Mills Divisions. They symbolize plants and technical equipment for the economical and flexible production of hot and cold strip.

Examples of application from the world of stainless steel.

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The group headquarters of the financial services company, Goldman Sachs in Manhattan, right in the middle of New York. (Source: ThyssenKrupp).

Stainless steel: Brilliant future prospects 2

analysis and studies the path towards the optimum solution 4

Modernization solutions that pay off 6

top-quality components from our high-tech workshop 14

effective and reliable implementation 16

examples of modernization 18 outokumpu nyby 20 outokumpu nirosta Krefeld 22 aperam Stainless europe 24 acciai Speciali terni aSt 26

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Cold Rolling MillS foR StainleSS Steel

analysis and studies the path towards the optimum solution

Modernization enables older rolling mills to be brought Other owners specify their aims, such as increased pro- up to the latest state-of-the-art. Several aims are usually duction, improved observance of tolerances or the pro- pursued when revamping a mill, such as the increase of cessing of certain special steel grades. production and improvement of quality. Further objec- tives are the saving of operating costs and the enhance- SMS group offers plant owners the service of analyzing ment of plant safety. the process requirements and potential of the existing mill within the framework of a study. The results of the Modernization projects for stainless-steel cold rolling study and of the consultations with the customer consti- mills require a special concept that is adapted to the tute an optimized modernization concept. respective mill and to the pertaining wishes of the cus- tomer. For this reason we develop modernization pro- SMS group is renowned for its ability to master all phas- jects in close cooperation with our customers. es of a project in depth, from the definition, planning and development, design, coordination of the purchasing and When establishing the need for modernization, owners procurement, to the fabrication, erection and commis- take different approaches. Some owners use their own sioning of the mill. analyses to define which components of a mill are to be replaced, added or improved.

Customer

Analysis of aims Definition of aims (if necessary, study)

Elaboration of initial proposals Joint optimization of aims and possibilities

Proposal for concept

Coordinated concept as a basis for the design and layout Quotation on the basis of the agreed concept/contract

The optimum modernization concept is the result of close cooperation with our customers.

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Communication and cooperation are the keys to success.

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Cold Rolling MillS foR StainleSS Steel

Modernization solutions that pay off

20-roll cold mills have been part of our range of products Modern hydraulic systems with a compact pump sys- since the fifties. Many aspects of the technology have tem and control elements in modular construction for been improved and optimized since the beginnings of easier and more cost-favorable maintenance these types of rolling mills in order to better satisfy the Dynamic process control systems and mill management constantly increasing demands of the stainless steel man- systems for perfect strip quality through optimum mill ufacturers. The most recent developments in the fields of stand presetting mechanics, hydraulics, electrics and automation enhance the productivity and improve the product quality. It is possible to retrofit many of the developments which today are automatically contained in new plants.

The most recent developments in A modernization offers many possibilities, from the instal- 20-roll cold rolling mills lation of individual systems (e.g. new rolling oil wipers) to comprehensive revamp packages. Hydraulic roll-gap adjustment system for achieving extremely close strip thickness tolerances Hydraulic roll-crown adjustment system for improved Potential areas for modernization flatness and optimum adaptation of the roll gap to the profile of the rolled stock The essential areas of potential optimization for Hydraulic axial shifting of the inner intermediate rolls a 20-roll cold mill are to be found in for perfect strip edges the entry and exit equipment Improved rolling-oil squeezer systems for drier strip the mill stand area surfaces and reduced consumption of rolling oil the hydraulic system Roll-changing systems for faster and safer roll-changing the rolling-oil filter and cooling system and higher productivity the roll gap lubrication Self-cleaning rolling-oil filter systems for greater envi- the automation system ronment-friendliness and higher cost savings

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Entry and exit equipment High-tech mill stand components for higher productivity for top quality

Coilers: The coilers are designed as high-tension Servo-hydraulic roll-gap control (AGC) reversing reels on both sides. The installation of Roll-crown adjustment system: Roll-crown adjust- an additional payoff group with a pinch and leveller ment is performed by servo-controlled adjustment roll unit shortens the non-productive times during cylinders. Additional roll-crown adjustment, e.g. coil changing and enhances the productivity, above for the bearing shafts F/G. all for entering strips with gauges of 6 to 8 mm. IMR shifting: Inner intermediate roll shifting by Automatic coiler mandrel lubrication for reduction means of push/pull system. During roll-changing, of the maintenance expenditure the inner intermediate rolls no longer need to be Flatness measuring rollers, including control system manually uncoupled. Moreover, the maintenance Efficient oil-wiper systems becomes easier. Mobile pinch rolls for problem-free threading of the Bearing shaft clamping: The attachment of the strip bearing shafts in the compact block-type mill is performed by a hydraulic saddle clamping system, which means that there is no loner any need for Advantages manual detachment by the maintenance person- of our high-performance oil wipers nel. Drive with safety coupling: The hydraulic safety The twin-roll unit in cassette-type design makes it coupling immediately separates the motor from possible to use several roll types (nonwoven, steel, the drive train should an overload occur. This pre- bronze, Pollastrelli) as desired, depending vents damage to the drive elements in the event on the application of a fault. Recently developed Nipco®* oil wiper system for Roll-changing: Equipment items for quick roll- uniform wiping effect over the strip width and changing are indispensable plant features for reduced quantity of residual oil on the strip surface enabling efficient productive operation. Quick-change system in cassette-type design Integrated primary wiper and strip-edge blow-off device Advantages Reliability also at high strip speeds, from 600 to of our modern mill stand components 800 m/min Higher dynamics of the actuators Improved positioning accuracy and thus better reproducibility of the product quality Higher adjustment speed Less wear Extremely close strip thickness tolerances and the smallest possible off-gauge lengths Extremely close strip flatness tolerances Simplified roll-changing Simplified operating sequences

Nipco®* oil wiper system: Yoke with support elements and roll sleeve in two variants.

* Nipco® is a registered trademark of Voith Patent GmbH

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Cold Rolling MillS foR StainleSS Steel

Everything flowing nicely: Finest-quality filter systems Hydraulic system Regenerative Supafine® filter system with Supafine® Adaptation to the modernized adjustment sys- filter elements for micro-filtration of the rolling oil tems: The hydraulic supply to the rolling facilities used is provided by a combined low-pressure and high- pressure hydraulic system. In the pump station, A large number of cold rolling mills for stainless steel the recirculation of the hydraulic oil takes place are still equipped with old precoated cartridge filters (cooling, heating, filtering). The high-pressure which cause great problems as regards waste dispos- pumps generate the required flow volume and al. Furthermore, the owners experience problems pressure of the fluid. Consumption peaks in the with heightened wear on the work rolls and poorer process sequence are absorbed by hydraulic surface quality due to break-out of diatomaceous accumulators. The control systems ensure a regu- earth. lated flow of the fluid in accordance with the requirements of the hydraulic consumers.

Advantages of our hydraulic systems

Leakages and installation times are minimized by pre-assembly and tests. Hydraulic systems from SMS are modular in structure and therefore are particularly operator-friendly and easy to maintain.

Mill stand with utility module. Supafine® filter.

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Advantages Supafine® of our filter systems Supafine® filters are used for the micro-filtering of Extremely high cleaning efficiency mineral oils of low viscosity which are used in the Low operating costs due to: cold rolling of stainless steels. Owing to its special - Low maintenance expenditure design, the Supafine® filter does not require any - No filtering agents required filtering agents which always require disposal. The - Low rolling oil losses filtration is performed by micro-fiber filter elements. - Few waste materials Our Supafine® filter elements represent the currently Environment-friendliness due to the small number most up-to-date solution for fine filtration. They can of waste materials requiring disposal operate without filtering agents, e.g. diatomaceous Long service life of filter elements earth. Waste products that cannot be recycled are No risk of break-out of filtering agent on the clean thus avoided. oil side High operational reliability due to fully automated In view of the need for environmental protection and system the lowering of operating costs, it makes sense to retrofit a Supafine® filter system as part of a revamp.

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Cold Rolling MillS foR StainleSS Steel

New clogging sensor for rolling oil Advantages

In cooperation with HYDAC International, SMS group Our ROCS makes it possible for the first time to has developed a new online measuring system for continuously monitor the filtrate quality. Alternative determining the degree of contamination of rolling oils. filtering agents can be examined for their efficiency. The Rolling Oil Contamination Sensor (ROCS) makes it This enables the filter operation to be optimized and possible to ascertain the quantity and size of particles operating costs to be reduced. in the rolling oil. The system can be integrated into existing plants.

The measuring principle is based on the so-called transmitted-light process. In this process, particles flow through a capillary tube that is penetrated by a light beam. When the light beam hits particles it becomes weaker upon impact on the receiver. The size and quantity of the particles are determined on the basis of this loss of strength and of the period of time during which the shadow is thrown. The concentration of the particles is also measured. In order to ensure that only individual particles are detected, the particle load must not be too high. The test specimen is diluted for this reason. The dilution is also performed in a fully automated manner in the device.

AUTOMATIK ISO-Klassen

Light source

Optical device ABREINIGEN Light beam Direction of rolling-oil flow

Capillary Optical device

Receiver

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Tailor-made tribology Advantages

Selection and provision of the tailor-made rolling oil Customers benefit from our know-how which Process-optimized lubricant development embraces the entire process chain Partnership with an experienced manufacturer Cooling lubricants are gaining in importance in the of cooling lubricants cold rolling process, due above all to the continually Customers have only one contact partner for increasing demands made on the value-added in the the complete process chain rolling process. This relates in particular to the follow- ing factors: SMS already has a large number of references with Availability tailor-made high-performance cold-rolling oils for Pass reduction rolling of stainless steel in 20-roll mills. Rolling speed Surface quality Thanks to improvements in the rolling process and in Steep run-up curve the surface quality, it was possible to convince those customers who already had production facilities to SMS group is the only full-liner for rolling mill technol- change over to rolling oils from SMS. ogy that is present on the market with an uninterrupt- ed range of rolling oils and emulsions. Particularly for the highly demanding rolling of 2R material (bright-annealed), a decisive degree of The essential key data for the tailor-made lubricant success was achieved with regard to freedom from are determined by the tribological T-Roll® model stains and improvement of reflectivity. approaches already at the plant design stage. The essential parameters are: Viscosity Lubrication effect Friction coefficients Lubricant film thickness T-roll model Forecast of On the basis of the above data, samples of selected process data, coolant lubricants are then examined for their suitabil- lubricant Rolling process parameters Preselection ity in a comprehensive testing program and optimized Process Lubricant for practical utilization. requirements

Optimized lubricant Test field Strip drawing test Ready for use

Optimization Lubricant formula

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Cold Rolling MillS foR StainleSS Steel

Automation Perfected automation systems

Progressive stainless steel production also denotes As system suppliers we assume the responsibility for fully up-to-date automation and supportive service all functions over the entire service life of the plants from a single source. We have grouped our services in built by us. the electrical and automation field under the name of X-Pact®. Our services include: Site erection, commissioning X-Pact® comprises: Maintenance management Production planning Inspections, repairs, spare parts Setup systems Counseling, optimization Control systems for the actuators 24-hour hotline and teleservice Gauge, flatness and elongation control Updates and upgrades for software and hardware Drive controls HMI systems Drives, measuring devices, sensors

Sophisticated X-Pact® automation systems.

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Advantages Example of a plant run-up, reference: VDM, Werdohl of our systems 70 60 We offer our customers perfected automation systems 50 for maximum plant efficiency and product quality. 40 Start of These systems are developed from interdisciplinary production 30 cooperation between the areas of mechanical engi- 20 neering, utilities, technology, and electrical and Production in % Current 10 Scheduled automation systems, as well as through cooperation 0 with leading worldwide manufacturers. Our product 10 20 30 40 range comprises integrated systems for drives, control Days since the start of the hot tests systems, process models and production planning (Levels 0 to 3).

Plug & Work: Switch on and off you go. That is the ogy is linked to a simulation model which displays the ideal case. For this, we test our systems in a really plant with its process stages. In this way, sequences thorough manner before commissioning: and technical functions are carefully tested and opti- Comprehensive simulations of functions are the first mized already before delivery. This ensures that a step. Following this, the complete automation technol- steep run-up curve is available, above all for revamps.

Level 3 Production planning and control Host computer (PPS)

Level 2 • Pass schedule model (PSC) • Profile and flatness model (PFC) • Edge drop control model (EDC) LEVEL 3

Level 1 Basic automation system • Operator stations • Sequence and drive controls • Measured value processing LEVEL 2 • Signal and data exchange

Level 0 Complete systems for plant equipment • Instrumentation and control technology • Drive engineering LEVEL 1 • Power supply • Ancillary facilities

LEVEL 0

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Cold Rolling MillS foR StainleSS Steel

top-quality components from our high-tech workshop

Our workshop in Hilchenbach (Germany) is a specialist Advantages high-tech production center for core components of our supply range. Our production shop is equipped with The expenditure on stand piping becomes fully up-to-date machines in accordance with the latest greatly reduced. knowledge relating to unit and job-lot production and The assemblies are arranged in a neat and compact guarantees high-quality, cost-efficient manufacture. layout, allowing easy maintenance, and are optimally accessible for servicing and repair work. All of the key components manufactured by us that are The platform modules are equipped with integrated essential for quality are pre-assembled in our workshop, valve units with piping. inclusive of piping and cabling, and are subjected to The hydraulic roll-gap adjustment cylinders are oper- comprehensive function testing. This facilitates rapid ated and controlled via a hydraulic servo-control. and problem-free final assembly at the customer. Erec- They are not susceptible to faults. tion and installation times are thereby reduced to an If desired, tanks and piping can be executed absolute minimum, thus allowing fast and reliable com- in stainless steel. mencement of production as a result of shorter com- The pump stations in modular design for high and low missioning. pressure comprise constant-pressure variable pumps and have a space-saving and compact layout. Our valve units are designed in “column construc- Modular structure of our mill stands tion” and can easily be extended to include additional functions. Our modular hydraulic systems for mill stand adjust- Comprehensive pre-assembly work and function tests ment (All-in-One design) have many advantages. They allow trouble-free installation and commissioning and ensure high plant availability and low operating costs. guarantee a fast plant run-up.

Pre-assembled housing window. Machining of a mill housing in Mono-Block design as part of a revamp.

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Pre-assembly. Pre-assembly of mill stand service platform.

Hydraulic function test. Hydraulic station. Partially pre-assembled 20-roll mill stand.

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Cold Rolling MillS foR StainleSS Steel

Modernization measures: effective and reliable implementation

The implementation of modernization projects requires a maximum degree of experience as well as close coop- eration with our customers. Consistent project manage- ment is necessary in order to safeguard the quality of the individual components and to ensure that agree- ments are honored. The actual condition of the plant has to be recorded precisely, and creativity needs to be exercised when adapting the designs of the new and/or modified equipment items to the existing foundations and to other local conditions and requirements. This is an essential precondition for ensuring that downtimes Project definition for the installation of new equipment or the revamping of existing items can be kept as short as possible. • Definition of objectives • • Analysis of process requirements and Short plant shutdowns plant potential (study) • Modernization concept Preparatory work during regular maintenance shut- downs and the installation of new or revamping of exist- ing equipment during longer downtimes (e.g. summer

shutdown) are carried out according to detailed time schedules.

Quotation Contract

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Success depends on close cooperation and partner- ship with our customers during all phases.

Engineering Production Installation Commissioning • Engineering from a • Detailed planning • A well-established and single source • Preparations during coordinated • In-house manufacture regular shutdowns commissioning team of core components • Nothing is • Tailor-made • Plug & Work: left to chance cooling lubricants Simulation of the • Optimum plant complete automation settings • Familiarized operating personnel

Efficient, tailor-made Short plant Fast plant run-up solution shutdowns

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Cold Rolling MillS foR StainleSS Steel

examples of modernization

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Cold Rolling MillS foR StainleSS Steel

outokumpu nyby, torshälla, Sweden

Dismantling and recommis sioning in record time

The plant Thanks to our systematic planning of the revamp, we 20-roll cold mill in Mono-Block design have succeeded in limiting the shutdown times to a mini- Stand size MB 23-56“ mum. While the mill stand was being modernized in our workshop, the entry and exit sections were revamped in The task parallel at the customer's works in such a way that coils The aim of the modernization of the 20-roll cold mill was with larger diameters can be processed to attain an improvement in thickness tolerances and strip flatness. The rolling mill originally supplied by us in Thanks to this revamp, it is possible to increase the max- 1956 rolls stainless hot and cold strip of the AISI 300 imum coil diameter to 1,900 mm and the maximum coil and AISI 400 series with strip widths from 700 to 1,400 weight to 25 t. The additional installation of coil transfer mm a minimum final gauge of 0.2 mm. cars enabled the non-productive times during coil change to be reduced. Furthermore, a new hydraulic station in Our solution our “All-in-One design” was installed. Due to the restrict- A modernization concept was elaborated jointly with the ed space available, it was erected at an elevated level on customer which envisaged the entire revamp in several a steel structure. phases. It included the dismantling of the mill stand, the transport from Sweden to our workshop in Hilchenbach, We likewise installed axial shifting of the inner intermedi- the mechanical overhaul of the mill stand including shop ate rolls, by means of which the strip edge is optimally assembly, the transport back to Sweden as well as the influenced under rolling force. The new hydraulic adjust- installation and recommissioning together with the entry ment system with automatic coupling of the rolls (push/ and exit sections revamped on site at the customer's. An pull axial shifting) meets all requirements for highly essential precondition for attaining this ambitious goal dynamic influencing of strip flatness. was the just-in-time machining in our Hilchenbach work- shop. Push/pull axial shifting The inner intermediate rolls are shifted by hydraulic cylin- The result ders which are only arranged on the drive side of rolls The mill stand was dismantled in merely two weeks and and are connected to the roll neck via a coupling. In our mechanically overhauled in our workshop. The bearing modern, sequence-controlled systems, no manual inter- shaft bores (wobblers) in particular were remachined. vention by the operators is required. Consequently, parallelism of the work rolls and therefore improved strip flatness could be attained. The mill stand Stages of revamping at Outokumpu Nyby was equipped with modern actuators for the roll and roll- Order placement: January 2003 crown adjustment and then installed and put into opera- Dismantling at Nyby: 3 days tion. With the new hydraulic roll-crown adjustment on the Mill stand machining in our workshop: 14 days B/C axis, a zone-controlled flatness control is possible. Installation at Nyby: 6 days The renewed saddle clamping for bearing shafts reduces Commissioning: 4 days the set-up time. Plant shutdown: 1 month

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The cold rolling mill after revamping.

Planning: 3D illustration of the overhaul of the mill stand. Remachining of the bearing shaft bores Housing window after the revamp. (wobblers) in our workshop. 21 W6-307E_Kalt-Edelstahl v2.qxp_Tandem 26.06.17 12:16 Seite 22

Cold Rolling MillS foR StainleSS Steel

outokumpu nirosta gmbH Krefeld, germany

Successful modernization of the 20-roll cold mill SG3

The plant The result 20-roll cold mill of type mono-block (MB 21BB-61“) To comply with Outokumpu Nirosta’s request, SMS group modified the mechanical mill stand equipment The task and the rolling oil system within a very tight time sched- At the Krefeld location, the mono-block 20-roll cold ule to ensure Outokumpu Nirosta could start producing mill SG3 which had been supplied by SMS more than the desired material grades on this mill as early as pos- 45 years ago is used to produce high-quality stainless sible. steel strips. To be able to roll also ferritic materials of thin strip dimensions and high-gloss quality (2R bright- On November 23, 2015 our customer managed to start annealed), Outokumpu Nirosta commissioned SMS group rolling again. in September 2014 to modernize all equipment required for that purpose. In 2015, Outokumu Nirosta awarded a After the modernization, our customer has a 20-roll cold follow-up order to SMS group comprising the moderniza- mill which is much more flexible to use and the cus- tion of the existing rolling oil system to make the rolling tomer can now roll ferritic, high-gloss strip grades, too. mill fit for producing such high-gloss grades. The newly installed equipment permits the entire thick- ness range to be rolled at maximum rolling speed. Thus, Our solution strip threading and unthreading has become much easi- When revamping the rolling oil system, part of the existing er and quicker, which, in turn, makes the facility operate equipment remained and was re-used. The most impor- at higher productivity and, not least with a view to the tant equipment newly installed comprised the dirt oil tank modified rolling oil system, more cost-efficiently. with automatic pre-separator and the extremely fine filter system Supafine® from SMS which is able to achieve a very high degree of filter fineness without using costly filter aids.

Scope of new equipment amongst others: Dual-cassette wiper system Cooling medium volume control Axial shifting system for the inner intermediate rolls Mill stand door Exhaust hoods Entry-side, adjustable and swingable pinch roll Exit-side bending and pinch roll Transfer tables New Supafine® rolling oil system

Modernized rolling oil system (3D illustration).

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Cold rolling mill SG3 after modernization.

Sludge tanks of rolling oil system. Systempumps of rolling oil system. New hydraulic valve stand.

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Cold Rolling MillS foR StainleSS Steel

aperam Stainless europe genk, Belgium

Ready to take on a new assignment

The plant The installation of an automatic coupling for the oil- Single-stand reversing cold mill of CVC® 4 design. air lubrication and of a paper winder completed the revamp. The supply systems (hydraulics, rolling emulsion The task etc.) and the safety technology were also adapted to In 1988 we supplied a CVC® 4-HS reversing cold mill to meet the new requirements. ArcelorMital Dudelange in Luxembourg (formerly Arbed) for the manufacture of low-carbon steel strip. In Decem- The result ber 2006, when relocating this cold rolling mill stand to The entire equipment was able to be delivered and the production location in Genk, Aperam Stainless Genk installed within twelve months. This short revamping peri- placed an order with us for an extensive revamp of the od was possible thanks to the excellent team work with reversing mill and for preparing it for its new area of the customer. For the customer, the use of a reversing application, namely the rolling of stainless steels. cold mill is highly advantageous from an economic point of view because the mill stand, a large portion of the With the mill in Genk, the customer wanted to reduce mechanical components and the auxiliary plant and facili- his production costs. Furthermore, he was thus able to ties can be utilized again. prepare the future expansion of his production capacity for stainless steel strip. The customer has thus received a powerful stainless- steel rolling mill of four-high design which has an annual Our solution capacity of 200,000 t. The rollable strip width is 800 to Within the scope of the revamp, CVC® shifting devices of 1,600 mm. Strips with an entry gauge of maximum 5.0 the latest generation were installed. The entry and exit mm can be processed. The minimum attainable final sides were equipped with wrapper rolls, pinch rolls, lev- gauge is 0.6 mm. eling and bending rolls and an oil wiper unit. Further- more, new reversing reels were installed, as well as two coil transfer cars and two coil receiving devices for each reel.

The fully automatic work-roll changing device was cus- tom-designed and completely revamped. The roll chang- ing car works with two cassettes which are able to accommodate a total of four roll pairs. Compared with the traditional design, the number of rolls on the car was thus doubled.

Main pulpit.

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Cold rolling mill at the new location in Genk.

Automatic work-roll changing system. Finish-rolled stainless steel strip.

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Cold Rolling MillS foR StainleSS Steel

acciai Speciali terni aSt terni, italy

Brilliant results at the new location

The plant Our solution Skin-pass mill of two-high design and two 20-roll cold Our scope of supply included the dismantling of the mills of Mono-Block design. three cold rolling mills at AST’s Turin location, the trans- port to Terni and the installation and commissioning of The task mechanical equipment and auxiliary facilities such as To concentrate the capacities for the production of cooling, hydraulic and filter systems. An important part cold-rolled stainless-steel strip at one location, Acciai of the modernization was the installation of new fire Speciali Terni SpA (AST), Italy, relocated production extinguishing systems. facilities from Turin to Terni in the middle of 2009. Within the scope of this project, AST gave us an order The result for the implementation and modernization of two 20-roll 20-roll cold mill No. 8 was the first of the three mills to cold rolling mills and a two-high skin-pass mill for stain- be successfully put into operation in May 2008, only a less steel. few months after it had been dismantled in Turin. This was soon followed by the commissioning of the second AST used this opportunity to have the equipment and cold rolling mill stand No. 9 in November 2008. And systems modernized by us. Despite them being in finally, in February 2009, the skin-pass mill was put into operation for decades, the rolling mills supplied by operation again after a brief revamping phase. This mill SMS group required only minimal alterations. In this is used for the skin-pass rolling of ferritic and austenitic process, the two 20-roll cold mills were equipped with stainless steel strip of grades AISI 400 and 300. The new oil wipers. strip gauges range from 0.3 to 5.0 mm and the strip widths from 800 to 1,540 mm. The maximum coil weight is 25 t.

Skin-pass mill of two-high design. Coil loading at the skin-pass mill.

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Skin-pass mill at the new location in Terni.

View of the 20-roll cold mill MB21BB-62“ (CRM No. 9). 20-roll cold mill MB22B-54“ (CRM No. 8).

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SMS group GmbH Cold Rolling Mills Division

Wiesenstrasse 30 57271 Hilchenbach, Germany Phone: +49 2733 29-1800 Telefax: +49 2733 29-1782 [email protected]

www.sms-group.com W6-307E © SMS group GmbH · Published on 01.07.2017 · Circulation 1000 · Printed in Germany · Ky

“The information provided in this brochure contains a general description of the performance characteristics of the products concerned. The actual products may not always have these characteristics as described and, in particular, these may change as a result of further developments of the products. The provision of this information is not intended to have and will not have legal effect. An obligation to deliver products having particular characteristics shall only exist if expressly agreed in the terms of the contract.”