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Contact - Karl Schmidt
karl.schmidt@sglcarbon.com
SGL Group - The Carbon Company
(440) 623-5680

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Our high-end product quality and performance of our carbon and graphite materials offers the most economical solutions to customer applications. Some of the more common applications are in the manufacture of crucibles and molds, graphite heating elements, heat treating furnace fixtruing, chemical processing equipment, molten metal extrusion, pressure casting, vertical and horizontal continuous casting, centrifugal casting, graphite susceptors, heat shields and furnace linings.

Our graphite materials offer economical and customized solutions for your most extreme applications and offer resistance to thermal shock, low CTE and excellent thermal conductivity.

Graphite is also widely used as electrode material in electrical discharge machining (EDM), and compared to copper, graphite allows a significant reduction in production costs while providing equal or even better product quality.

The SGL Group offers a wide range of product grades for EDM electrodes throughout the entire processing chain of manufacturing molding and forging tools. Their capacities extend from high roughing rates to ultra fine finishing.

• Large sized rounds and rectangular blanks
• Sandwich dies for pressure sintering processes
• Continuous casting graphite dies, graphite centrifugal casting dies
• Powder and graphite rods for diamond synthesis; heating elements and support parts for production of synthetic diamonds
• Large sized blanks and graphite electrodes for electrical discharge machining (EDM) for forging dies, die casting molds and injection molding tools
• EDM (Electrical Discharge Machining)

High temperatures and heavy loads characterize the production processes used in glass manufacture and make extreme demands on the materials in the system components.

The SGL Group produces precisely machined components from specialty graphites for the continuous production of plate glass in float glass systems. Our carbon fiber-reinforced carbon (CFC) components feature high thermal shock resistance and outstanding mechanical strength in hollow glassware production.

• Tin bath linings, cooling equipments and top rollers, guidance systems for the tin bath, gas guide systems and insulation felts for the production of float glass
• Scoops for distribution of glass drops, molds and various accessory parts made of carbon, graphite or carbon composites for container glass production
• Graphite and C/C parts for technical glass production
• Graphite and C/C dies and plungers for hot pressing processes for the production of e.g. boron nitride products and others
• Furnace components for manufacturing high performance ceramics

In view of the various demands on specialty graphites used for continuous casting, SGL Group group has developed special graphite grades to meet the specific requirements of the different applications.

Due to the high thermal conductivity of graphite, there is a risk of "chilling in" at the edges of rectangular or square sections of cast iron. To avoid these undesirable and extremely hard structures, the corner strips of split molds are made of carbon grades with low thermal conductivity. Thus, the cooling process at these critical points is delayed. The RINGSDORFF® R4261H grade has proved to be very effective in this respect.

• Large sized blanks and molds for pressure casting, continuous casting, centrifugal casting and wheel casting; graphite plates for cooling of complex grey iron shapes
• Large sized blanks and graphite dies for continuous casting of stainless steel and grey iron
• Electric heating elements, holders and contacts for vacuum steel degassing systems
• Graphite Crucibles for gas analysis of metals
• Graphite Trays & Boats, Crucibles, Fluxing (Degassing) Tubes, Molds & Dies, Furnace Parts, Foundry Accessories, Canisters & Aluminum Extrusion Boards Anodes, Crucibles, Ingot Molds, Custom Molds

The energy efficiency and lifetime of cathodes are major factors governing the cost-effectiveness of the aluminum production process.

Our comprehensive product range provides the ideal solution for all primary aluminum production technologies. Along with the leading aluminum producers, we develop new products, reduce power consumption in aluminum cells and extend the lifetime of our cathodes.

• Large sized blanks, graphite dies and plates for continuous casting of non-ferrous and precious metals
• Large sized crucibles and heating systems for melting and holding processes
• Fluxing tubes, gas distribution and gas injection systems for purification of aluminum melts; plates and belts for run-out tables for aluminum profile extrusion; crucibles and boats for aluminum casting; electrodes for aluminum surface cleaning
• Electrical contacts, dies and support plates for brazing processes
• Crucibles for gas analysis of metals
• Aluminum casting rings made of graphite

SGL Group manufactures a wide range of SIGRAFORM® products for the refractory industry.

When processed into plates and molds, our graphite products are used to manufacture refractory materials in complex geometric shapes to cater for furnace linings used in the iron and steel, glass, aluminum, concrete and ceramics industries, as well as shaping tools for these industries.

SIGRAFORM® carbon and graphite materials display the following key properties in practical use:
High thermal shock resistance - High mechanical strength and impact resistance - Low hardness, hence easy and fast remachining - Low wettability and low tendency to bond - Excellent corrosion resistance - High thermal stability - Favorable porosity

• Graphite crucibles and susceptors
• Carbon and graphite plates
• Carbon and graphite for casting molds
• Carbon and graphite for pressure, centrifugal and railroad wheel casting

Plant availability combined with greater operational reliability and lower emission rates are of key importance to our customers. Aggressive and volatile media need to be controlled reliably.

We offer customized engineering concepts based on our corrosion-resistant heat exchangers, columns, pumps, quenchers and safety disks, as well as our process equipment graphite systems. Our newly developed decomposition units for fluorinated hydrocarbons contribute to enhance a clean environment. Our flexible graphite sealings meet the highest safety standards and stringent environmental regulations.

• Electrodes for aqueous and organic electro synthesis
• Graphite anodes and cathodes for chlorine-alkali electrolysis
• Decomposer graphite granules for mercury cells
• Electrodes for chemical separation processes
• Graphite anodes and cathodes for electrolysis of lithium, sodium, magnesium and fluorine
• Anodes for corrosion protection of pipe lines

Plant availability combined with greater operational reliability and lower emission rates are of key importance to our customers. Aggressive and volatile media need to be controlled reliably.

We offer customized engineering concepts based on our corrosion resistant heat exchangers, columns, pumps, quenchers and safety disks, as well as our process equipment graphite systems. Our newly developed decomposition units for fluorinated hydrocarbons contribute to enhance a clean environment. Our flexible graphite sealings meet the highest safety standards and stringent environmental regulations.

• Vessels and components (e.g. support grids) made of graphite and C/C for chemical plants
• Structured C/C packings for columns
• Graphite blanks for manufacturing heat exchangers
• Graphite spreaders in distillation columns
• Vessels and Reactors, Bushings & Bearings, Packing Rings & Seals, Roller Guides, Valves, Rotors & Vanes

The demands placed in medical technology are very high; they concern the quality of the materials used, hygiene, reliability and the precision of the products.

The SGL Group produces components from carbon fiber-reinforced plastic (CFRP) for radio technology. The low X-ray absorption levels of CFRP make it possible to work with a low X-ray intensity.

Owing to its excellent properties, graphite is also used for the manufacture of the rotating anodes used in X-ray tubes. The high quality standard of the graphite and consistency in its mechanical properties make SGL Group a reliable supplier.

• Graphite discs as heat sinks for X-ray anodes
• Dental crucibles for melting precious metal alloys
• Operating materials for manufacturing of mechanical heart valves

With more than 50 years of international experience to draw on, SGL Group is a competent supplier of carbon based parts for nuclear reactors. We have developed a whole portfolio of materials both for pebble bed and prismatic reactors. In 2001 we became the proud supplier of a current HTR project.

Uniquely positioned in the industry, the SGL Group offers the full range of carbon-based products from the biggest variety of graphite types (isostatically pressed, extruded and vibration-moulded) thru fuel matrix material and Machined Graphite Spheres to components made from Carbon Fiber Reinforced Carbon (CFRC), both for structural elements as well as for Hot Gas Duct components.

Carbon fiber materials from the SGL Group are used to reinforce the rotor blades of wind turbines and to provide key components for fuel cells. High purity graphites and insulation materials are produced for the manufacture of polysilicium for photovoltaic solar cells. In addition, expanded graphites can also be used for highly efficient thermal storage. For energy storage and conversion we develop innovative products and solutions in our laboratory, such as materials based on carbonized sea grass for super-capacitors.

Engineering services ranging from component development to qualification tests can also be provided by the SGL Group.

To fulfil the special requirements on finished parts, the SGL Group is using state-of-the-art technology for its machining work in order to meet the high quality both for precision and purity.

• Graphite sleeves as support structure of fuel elements and as gas ducts in gas cooled reactors
• Fuel matrix powder, graphite and composite components for high temperature reactors
• SGL Group supports the database activities of the IAEA on irradiated nuclear graphite properties.
• Tiles made of graphite or carbon composites for lining nuclear fusion reactors
• Containment shells for nuclear transportation
• High Purity Structural Components, Reflectors, Moderators
• Rocket Nozzles
• Carbon Fiber Composite material for wind mill blades.

Even under extreme stress, materials and structures used in aerospace technology must be light in weight – and reliable, stiff and resistant at the same time. Carbon fiber-reinforced composite materials meet all of these requirements.

The SGL Group covers the complete value chain in its own production facilities in Europe and the US. Structural components made from carbon fiber-reinforced plastic are used, for example, to stabilize the vertical tail plane rib truss assembly of the new A380 large-capacity aircraft.

In addition, our high-performance brake disks incorporating carbon fiber-reinforced carbon bring aircraft to a safe halt.

Brake and Clutch Components

The SGL Group has made a name for itself over many years as a market leader in lightweight composite materials for automobile and motor racing brakes. Originally designed in conjunction with Porsche, carbon-ceramic brake disks represent a revolution in brake technology thanks to their weight and long service life.

Renewable energy is an indispensable part of the energy mix of the future. Solar energy plays a key role here because the potential of the sun as a source of energy is almost unlimited.

Our products made from high-purity fine-grain graphite and carbon fiber-reinforced carbon allow the production of both silicon and solar wafers and cells. As a long-standing supplier and development partner, we make a key contribution to product and technology innovations in the photovoltaic sector.

Crucibles and Molds for Processing Solar Silicon

In the manufacture of solar silicon preproducts, the crucibles, boats and various other molds and heating systems used in different processes are made from graphite or carbon fiber-reinforced carbon (C/C), sometimes in very large dimensions. To comply with dimensional requirements, large-size extruded graphite materials are used as well.

Coating Carriers for Solar Technology

Key requirements to ensure a long service life for PECVD carriers are high mechanical strength and purity, as well as a dense material structure to minimize plasma erosion.

SGL Group has developed graphite materials that meet these requirements. All commonly used carrier types are available with a high surface quality and evenness and/or a roughened surface as specified.

On request, the carrier can be supplied with pyrographite or silicon carbide coating. Large C/C carriers are frequently needed in solar cell production. Graphite plates of high purity are needed for special systems.

A major criterion for assessing the cost-effectiveness of industrial processes is the output per production unit. A viable means of accelerating the speed of the processes is to reduce the masses moved.

CFRP components are characterized by low intrinsic weight and high torsional rigidity combined with minimum overall height – properties no other material is likely to match. SGL Group‘s carbon fiber-reinforced robot arms often allow component weight savings of up to 80 percent while providing higher rigidity and strength at the same time. This offers new dimensions in achieving high-precision movements.