Edelstahl Witten-Krefeld GmbH

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Edelstahl Witten-Krefeld GmbH Steel Solutions

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Edelstahl Witten-Krefeld GmbH has been synonymous with know- how in manufacturing of speciality steels for more than 150 years; high- quality tool steels are still the focus of our steel production.
Extensive investments and a successful restructuring in recent years have also considerably strengthened the worldwide market position of Edelstahl Witten- Krefeld. This means for our customers:
• even faster availability of optimum steels
• even higher quality of steel products
• even closer proximity to clientele
• even shorter production times
• even wider production range.
Not only have our technical consulting and sales departments combined but also individual teams have been formed to better service customers worldwide.
Furthermore Thyssen Edelstahl Service GmbH (TES) has been incorporated; this measure will improve the performance of Edelstahl Witten-Krefeld with regard to domestic sales.
A further step was the integration of the Thyssen heat treatment facilities. This enables Edelstahl Witten-Krefeld to provide complete tooling projects, material and heat treatment from one source, with communication channels throughout the manufacturing process.
Witten mill
Our position in the world market has fundamentally improved through the integration of eleven sales companies abroad.
Now Edelstahl Witten- Krefeld has – besides the already existing sales channels – its own subsidiaries in Australia, Brazil, Canada, China, France, Malaysia, Mexico, Portugal, Singapore, South Africa, Turkey and the USA.
This tight web of worldwide distribution centres in the most important markets guarantees customer service at the highest level and direct exchange of information between end-user and manufacturer.
Thus Edelstahl Witten- Krefeld can strategically align its machining shops and heat treatment capabilities exactly to the market requirements “just in time”.
Global player
The origins of Edelstahl Witten-Krefeld GmbH reach back to the years 1853 and 1900 respectively.
The Witten mill was founded by Carl Berger in 1853. Rolled and forged long products were the main focus.
The Krefeld mill was set up in 1900 by August Thyssen and other industrialists with emphasis on tool steels.
Both companies merged in 1975, trading as Thyssen Edelstahlwerke AG. By another merger of Thyssen Edelstahl AG and Thyssen Stahl AG in 1992 the business unit “semi- finished products, steel bars and forged products” was established within Thyssen Stahl AG.
This business unit became an independent company in 1994 as Edelstahl Witten-Krefeld GmbH, with production units at Witten, Krefeld and Hattingen.
Innovation out of tradition
The melting process, first step in steel production, is located in the Witten works of Edelstahl Witten- Krefeld.
In our electric arc furnace we melt tool steels as well as high-alloyed engineering steels; stainless, acid and heat-resistant steels. Afterwards the liquid steel will be cast in ingot moulds or into a continuous bloomcaster according to grade and final dimension of the product.
More than 50 different dimensions of ingot moulds are available. Concast blooms are manufactured by a two- strand vertical continuous caster.
In order to meet especially high requirements as to homogeneity and degree of purity Edelstahl Witten- Krefeld operates three electro-slag remelting furnaces and one vacuum arc remelting furnace at its Krefeld site.
Steel production – melting, casting, remelting
For the manufacture of our diverse product range a great number of hot forming units are available at Edelstahl Witten-Krefeld.
The further processing (hot forming) of the ingots or continuous cast blooms starts with the pre-heating in a rotary- hearth furnace at either the completely redesigned roughing mill at Witten or at the forging shops in Krefeld and Witten.
In the roughing mill semi- finished products, bars, universal plates and flat bars are produced by one blooming stand and two finishing stands. For dressing and straightening of semi-finished products and bars two modern finishing lines are available.
A 33MN open die forging press and the world’s biggest long forging machine currently in operation, which can handle a final dimension up to 550 mm, are located in Krefeld. For smaller dimensions another long forging machine is available at Witten.
State-of-the-art units for annealing, hardening and tempering are at the disposal of the Witten and Krefeld plants.
In addition thin sheets can be heat-treated without almost any distortion in our modern precision hardening unit at Hattingen.
Rolling and forging
manufactured by state-of- the-art lathes, milling and grinding machines.
The main emphasis here is on rolls, shafts, piercing mandrels, cylinders and guide rolls for continuous casting lines.
The Witten machining shop manufactures tool and mould parts utilising the latest machining and computer technology. The product range covers pre-machined blocks as well as precision milled/ ground flats and squares, as well as semi-finished and pre-finished mould parts weighing up to 50 tons.
We supply tailored solutions
Edelstahl Witten-Krefeld therefore not only offers optimum steel grades in different shapes and sizes, but also pre-machined parts and pre-finished components.
More and more the end- users wish to receive steel products without rolling or forging skin for further processing. At Edelstahl Witten-Krefeld rolled or forged bars as well as tube rounds can be peeled, turned, pressure-polished and chamfered. Squares and flats can be supplied milled or ground. At the Krefeld machining shop rotation-symmetric pieces up to 20 tons per piece are
Pre-machined tool mould
Heat Treatment Technology
To optimise the resilience of tools and components made from specialty steels, heat treatment tailored to individual applications is a must.
Quite often steels used for toolmaking do not have the exact properties to meet the demands of the tool itself. It is therefore indispensable to modify this steel by heat treatment with regard to hardness, strength, toughness or wear resistance to make it meet the specification of the said tool or component.
Heat treatment technology has a long tradition at Edelstahl Witten-Krefeld. Individual solutions are developed at Lüdenscheid and Stuttgart for all possible kinds of heat treatment.
From hardening of pre- machined tools to customised surface treatments – the heat treatment technology available at Edelstahl Witten-Krefeld allows us to offer complete tool projects in an optimal way and from one source.
Perfection and individuality from one source
15 Plasma nitriding
Avoiding mistakes instead of discovering them
This is the simple but demanding motto of the quality management at Edelstahl Witten-Krefeld.
A production aiming at zero defects and process reliability is our business objective. The focus has shifted from material testing of the finished product to monitoring of the production process.
The most important quality factor is the longstanding staff and their know-how. This is why we offer a diversified programme for extended vocational training at Edelstahl Witten-Krefeld which is highly appreciated by the personnel. Furthermore the experiences of the employees from all levels within the company are integrated into project work and are vital for finding solutions in Kaizen workshops.
Total Quality Management
At Edelstahl Witten- Krefeld Total Quality Management is based on an active and certified quality assurance system according to EN ISO 9001, QS 9000, VDA 6.1 TS 16949, KTA 1401 and special requirements of the aerospace industry.
From material control in metallurgy, from melting to casting, as well as structural, surface, dimensional and identification checks in the rolling mill and forging shop finishing departments to the mechanical-technological test upon samples, all processes during production are monitored, controlled and regulated.
The customers’ requirements as well as production process and testing data are collected, processed and analysed in EDP systems according to
production and test sequence specifications.
These analyses help for direct process control and assessment of the quality level, making it the basis of a steady quality assurance or enhancement of the quality level.
Process monitoring instead of product check
Product Range
Tool steels – as individual as your requirements
The solutions provided at Edelstahl Witten-Krefeld are as individual as the customers’ demands regarding the right grade of steel.
The wide range of tool steels available from Edelstahl Witten-Krefeld meet many requirements such as good machinability, high wear resistance, good thermal conductivity, good hardenability as well as excellent properties for polishing and etching.
As an expert in speciality steels and one of the world’s biggest manufacturers of tool steels Edelstahl Witten- Krefeld today can produce exactly the steels necessary for your individual requirements.
More than 20,000 tons of tool steel in about 4,000 different sizes and shapes are always available ex central stock at our works.
The product range of Edelstahl Witten-Krefeld comprises three categories of tool steels:
- Cold-work steels / High-speed steels
Whenever top efficiency is required from steel products, cold-work and high-speed steels from Edelstahl Witten-Krefeld are in demand.
Due to their enormous wear resistance, high hardness, toughness and compressive strength, cold-work and high-speed steels from Edelstahl Witten-Krefeld set the standards and make those steels the materials of choice for numerous demanding industrial applications.
We offer a variety of cold- work tool steels, fine- tuned to the respective applications by alloying elements. These high- performance steel grades enjoy an outstanding reputation worldwide.
In close cooperation with end-users and based on actual feedback Edelstahl Witten-Krefeld continuously improves cold-work and high-speed steels.
Due to their typical properties and their long service life cold-work and high-speed steels are used for cutting, punching and bending tools, cold- forming dies and shear blades, drawing and stamping tools, thread cutting rolls and many more applications.
The delivery programme of cold-work and high- speed steels from Edelstahl Witten-Krefeld covers the following brand names:
Product Range
If the strain goes to extremes, for example in forging dies, diecasting moulds or extrusion tools, steels with extraordinary dimensional stability and resistance to thermal fatigue are required.
The high-class hot-work tool steels of Edelstahl Witten-Krefeld exactly meet these demands.
Besides high resistance to tempering and resistance to thermal shock and fatigue they guarantee high wear resistance and toughness under thermal load.
Typical applications for hot-work tool steels are diecasting moulds, extrusion tools, forging dies, glass moulds and mandrels for the manufacture of seamless tubes.
Edelstahl Witten-Krefeld supplies highest steel quality for each of these applications and moreover is in the position to endow the required steels with special properties specifically tuned to the application in question.
The delivery programme of hot-work tool steels from Edelstahl Witten- Krefeld covers the following brand name:
Product Range
The perfection of a hard hat eventually depends on the choice of the right steel being used for the plastic moulding.
The high-quality plastic mould steels from Edelstahl Witten-Krefeld can be matched to the properties required by the moulders of plastic products. Here, the perfection and flawlessness of a plastic surface is determined: will it be shiny, dull, smooth or structured, will it have an elegant touch?
Besides high wear resistance, steels for plastic moulding from Edelstahl Witten-Krefeld exhibit excellent polishability, EDM and texturing properties, good corrosion resistance and economical machinability.
Regardless of whether large plastic parts are needed, aggressive plastics have to be processed or resistance against high flexural stresses is required, Edelstahl Witten-Krefeld offers five groups of the most important steels for plastic moulding.
According to demand, therefore, case-hardening steels, pre-hardened steels, corrosion-resistant steels, nitriding steels or maraging steels are at your disposal.
The delivery programme of steels for plastic moulding from Edelstahl Witten-Krefeld covers the following brand names:
- THYROPLAST® - CorroPlast®
Plastic mould
Product Range
Stainless, acid and heat- resistant steels from Edelstahl Witten-Krefeld are required wherever steel is exposed to forces of nature, for example on oil platforms or chemical installations.
Stainless, acid and heat- resistant steels from Edelstahl Witten-Krefeld are high-quality materials of particularly high purity and homogeneity. They meet the toughest technical demands due to their extreme resistance to corrosive and mechanical stress, high strength and elongation values and their very high thermal stability.
Tailor-made properties can be achieved by means of precise alloying and process engineering specifications for melting, forming and heat treatment.
Due to their outstanding resistance to chemical corrosion and excellent mechanical properties, stainless, acid and heat- resistant steels are the material of choice especially in the chemical industry, food industry, energy, medical and transport industry, aerospace applications, mining as well as onshore and offshore industry.
The delivery programme of stainless, acid and heat- resistant steels from Edelstahl Witten-Krefeld covers the following brand names:
Stainless, acid and heat-resistant steels
27 Stainless, acid and heat-resistant steels in the chemical industry
Product Range
When machines and their components are exposed to high dynamic stresses, for example, in gears of propeller drives, one cannot afford to compromise steel selection.
Engineering, automobile and gear construction would not have advanced without engineering steels and steels for anti-friction bearings.
Whenever high surface hardness, fatigue strength and higher temperatures are involved, engineering steels from Edelstahl Witten-Krefeld are second to none.
Besides a great number of heat-treatable steels in different conditions of heat treatment, case- hardening and nitriding steels are produced for components with high wear resistance, good fatigue strength and high core strength.
Another important application is steels for the ball and roller bearing production. Because of exposure to high compressive and abrasive stresses ball and roller bearing steels have to possess maximum hardness and a very good cleanliness.
Edelstahl Witten-Krefeld can achieve tailor-made properties for the individual requirement by fine tuning of the chemical composition.
The delivery programme of engineering steels and steels for anti-friction bearings from Edelstahl Witten-Krefeld covers the following brand names:
Engineering steels and steels for anti-friction bearings
29 Propeller drive gears
Product Range
No other sector demands more from materials than Formula 1. Only with innovatively developed materials like Ferro-Titanit® can some racing engines really get into gear.
The trademark Ferro- Titanit® stands for a metal-matrix composite made by powder metallurgy techniques and is a hardenable carbide tool material from Edelstahl Witten-Krefeld.
Normally tool steels and tungsten-carbide alloys are available for tools and wear-resistant parts. Ferro-Titanit® unites the properties of both material groups in an ideal way.
Depending upon the application Ferro-Titanit® contains up to 45 % of titanium carbide, one of the hardest and most
resistant carbides. Due to high wear resistance and low tendency for pick-up Ferro-Titanit® is particularly suitable for cutting and forming tools, stamping tools, pelletiser knives and granulator blades.
Outstanding resistance to shock, a high modulus of elasticity, low specific weight as well as high compressive strength and highest wear resistance at the same time make Ferro-Titanit® an ideal material for high-speed spindles and drill rods, as well as for motor construction in racing.
Gudgeon pins and camshafts made of an especially developed grade are running in test motors in a promising way. Other components exposed to high wear are already integral parts of racing engines.
FORTINOX S.A. Rivadavia s/n Centro Industrial Garin B 1619 ADQ - Garin - Buenos Aires T +54 33 27 44 8088 F +54 33 27 44 8089
ThyssenKrupp Special Steel Australia Pty. Ltd. 800 - 808 Princes Highway Springvale Victoria 3171 P.O. Box 99 Glen Waverly, VIC 3150 T +6 13 95 47 2077 F +6 13 95 46 2612
ThyssenKrupp Materials Austria GmbH Freudenauer Hafenstraße 26 A - 1024 Wien T +43 1 72 7310 F +43 1 72 73 15 00
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China / Hong Kong
German-Steels Co. Ltd. G/F, Unit 1, Wah Sang Industrial Building 14-18 Wong Chuk Yeung Street Fo Tan, Shatin, N.T. T +852 2 728 7071 F +852 2 690 0328
ThyssenKrupp Materials France S.A.S. 6, Avenue Gutenberg F - 78311 Maurepas-Cedex T +33 1 30 69 6700 F +33 1 30 50 9346
Edelstahl Witten-Krefeld worldwide
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ThyssenKrupp Materials Schweiz AG Industriestrasse, Bronschhofen CH - 9501 Wil T +41 71 91 36 400 F +41 71 91 36 590
Thai-German Special Steel Center Co. Ltd. 234/41 Mao 66, Thailand Suksawad 78 Road - Prasamutjadee 10290 Samutprakarn T +66 2 817 6025 F +66 2 817 5445
ThyssenKrupp Asal Celik TIC. A.S. IMES Sanayi Sitesi A Blok 101 Sok. No. 13 81260 Y. Dudullu - Ümraniye/Istanbul T +90 216 499 5990 F +90 216 499 5989
Thyssen Specialty Steels, Inc. 365 Village Drive Carol Stream IL 60188 T +1 630 871 2330 F +1 630 690 0925
Heat Treatment Shops
Branch Lüdenscheid Kerkhagen 5 D - 58513 Lüdenscheid T +49 2351 553-50 F +49 2351 553-45
Branch Stuttgart Schwieberdinger Straße 42-44 D - 70435 Stuttgart T +49 711 8297-140 F +49 711 8297-142
Edelstahl Witten-Krefeld worldwide
Great Britain
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Bitros-Thyssen Special Steels SA 100, Nato Avenue GR - 193 00 Aspropyrgos near Attika T +30 20 55 09 490 F +30 20 355 96 200
TK Acciai S.p.A. Socio Unico Viale delle Industrie, 9 20040 Cambiago (Mi) T +39 02 95 34 80-1 F +39 02 95 34 80-200
ThyssenKrupp Metals Co. Ltd. 371 - 37 Gasan-Dong Kumchun-Gu Seoul Korea T +82 2 858 6061 F +82 2 858 6063
Suppac Steel SDN BHD 7, Jalan Lingkungan Raja Lumu Pandamaran Industrial Area 42000 Port Kelang Selangor Darul Ehsan T +603 3167 0467-9 F +603 3168 5517
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ThyssenKrupp AG Representative Office in the Russian Federation Intern. Trading Center Office 1209-10 Krasnopresnenskaja Na. 12 123 610 Moskow T +7 095 258 2075 F +7 095 258 1140
Pacific German Special Steel Services Pte Ltd. 21 Third Chin Bee Road Jurong Town Singapore 618694 T +65 6261 5533 F +65 6261 1817
South Africa
ThyssenKrupp Materials S.A. (Pty.) Ltd. 36, Crucible Road Heriotdale 2094 2000 Johannesburg
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