Graphite Materials and systeMs Specialty …

1 Graphite Materials and systeMs Specialty Graphites for the Metal Industry 2. Specialty Graphite and Process Solutions made by SGL Group. Advanced material , equipment, and process solutions Engineered for customers from more than 35 industries Tailor-made from the most comprehensive product portfolio In-depth production and material knowledge Consistent high quality, performance, and service Attractive total cost of ownership Broad Base. Best Solutions. Business Unit Graphite Materials and systeMs 3. Advanced solutions enable our customers to get ahead. SGL Group offers advanced solutions even for challenging applications. We understand the specific requirements of our customers and combine in-depth production, material , and engineering knowledge with the most comprehensive Specialty Graphite portfolio.

2 This makes us the partner of choice to leading companies in many different industries. Exceptional resistance to heat and corrosion, high we engineer tailor-made solutions in close purity and mechanical strength are just a few of partnership with our customers. the outstanding properties which our Materials offer. Specialty Graphite products from SGL Group SGL Group covers the entire value chain of achieve optimal results where other Materials fail. Specialty Graphite production, including raw No matter what your specific requirements might material processing, semi-finished product be, we will identify the best solution from the most manufacture, precision machining, purification, comprehensive range of Specialty graphites. and coating. When it comes to engineering of equipment and process solutions our service Fine grain Graphite : isostatic, vibration- range makes the difference: We offer mechanical molded, die-molded, extruded and process design, production, assembly, commis- Expanded natural Graphite sioning, and service all from a one-stop shop.

3 Carbon fiber-reinforced carbon (C/C) This is how we control and ensure the consistent Soft and rigid Graphite felts high quality, reliability, and performance of our Silicon carbide-coated Graphite Materials products and enable our customers to become more competitive. Challenge us. We are there for Additionally we use other Materials like PTFE, you worldwide. silicon carbide, and Specialty metals. Specialty Graphite solutions for the metal industry With our portfolio and technical know-how spanning more than 35 different industries, Innovative Specialty Graphite solutions help our customers in the metal industry in many areas: from casting and purification processes for pure metals and alloys to sintering processes in the b Boring a crucible made from powder metal industry. With optimized Materials , SIGRAFINE fine-grain Graphite we are a partner of choice to leading companies.

4 4. Specialty graphites made by SGL Group. Solutions for the metal industry. For our customers in the metal industry, everything revolves product lifetime, and cost efficiency, the requirements for com- around melting, casting, and shaping at very high tempera- ponents and systeMs are becoming ever more challenging. The tures. With the increasing demands on material purity, focus is increasingly on Specialty graphites. + SIGRAFINE is the new brand name for our fine-grain graphites, previously known under the names RINGSDORFF , SIGRAFORM , SIGRAMENT , and CRYSTA-SIL . Graphite crucible Cooling system Withdrawal unit Graphite die Applications Horizontal casting Materials made of SIGRAFINE . carbon and Graphite Isostatic, vibration-molded, die-molded and extruded graphites Products Cooling plates of the SGL Group Dies Crucibles Casting molds Semi-finished products (round/rectangular material ).

5 Specialty Graphite solutions FOR THE METAL INDUSTRY 5. SGL Group is proud to be able to offer the metal industry For consistent quality, every stage of our production is best solutions, even for the most challenging tasks. With strictly monitored. Every block is tested and documented. our innovative, high-performance Materials , we support the These measures range from thorough incoming goods inspec- development of this industry. tions and raw Materials testing to continuous monitoring of Our manifold Materials are appreciated for their outstanding process parameters and sampling from each individual block technical properties and ability to meet the highest require- that leaves the production process. In addition, clear identifi- ments in terms of quality, cost efficiency, and eco-friendliness: cation codes make it possible to trace the provenance of each from achieving extremely high purity to simplifying machining, product every step of the way.

6 And saving on flushing gas. In numerous applications, our Specialty graphites enhance the performance of systeMs and processes. + Video: isostatic Graphite , a key product for the high-tech industry. sglgroup Graphite crucible Spout Cooling system Graphite gas injection tube Graphite die Graphite ladle lining Withdrawal unit Vertical casting (furnace-dependent) Degassing systeMs SIGRAFINE SIGRAFINE . isostatic, vibration-molded, die-molded isostatic, vibration-molded and extruded graphites and extruded graphites Cooling plates Gas injection tubes Dies Rotary gas distribution systeMs Crucibles Casting rings Casting molds Ladle linings Semi-finished products Tapping spouts (round/rectangular material ). 6. Specialty graphites for continuous casting Graphite Materials offer a range of advan- tageous properties that can prove benefi- cial in many metallurgical applications, such as continuous casting: Excellent thermal shock resistance High chemical and thermal resistance Increasing flexural strength with rising temperature Adjustable thermal conductivity for optimized slip properties Specialty GRAPHITEs FOR CONTINUOUS CASTING 7.

7 SIGRAFINE fine-grain graphites for dies and crucibles Continuous casting of non-ferrous metals, precious metals, For dies and crucibles, extruded and vibration-molded and iron is a widely used process. It offers non-stop produc- graphites are used, depending on the size. tion and ensures high material quality. Thermal shock resistance, consistently high purity, and high Thanks to their high thermal conductivity, our isostatic material density with low porosity guarantee excellent Specialty graphites enable rapid, targeted solidification of melting processes. metal alloys. For vertical continuous casting, large molds, and low through- SIGRAFINE fine-grain graphites are tailored to specific put, extruded graphites, such as SIGRAFINE HLM, can also alloying requirements. be used as a material for pressure components.

8 In addition, With critical metal alloys in mind, we have developed special numerous synthetic Graphite powders are available as car isostatically pressed graphites with high mechanical strength burizing agents. and density. We supply them as semi-finished products but also make crucibles and dies from them to suit individual requirements. b Vertical down casting of precisious metal alloy, melting in a Graphite crucible and typical continuous casting Graphite dies Recommended use of SIGRAFINE isostatic graphites for metal alloy dies Alloy Shape R4340 R4500 R4550 R4810 R4820. round . CuZn strip . wire . round . CuSn strip . wire . round . CuNiZn strip . wire . round . CuNi strip . wire . round . Ag alloys strip . wire . round . Au alloys strip . wire . Gray cast iron/spheroidal cast iron.

9 Other grades on request. Please contact us. material data and dimensions can be found on page 8. 8. The thermal conductivity of Graphite is higher than that of one quarter that of iron. Thermal conductivity and thermal many metals and decreases with rising temperature. The expansion can be adjusted by appropriate selection and pro- thermal expansion coefficient of many Graphite grades is only cessing of the raw material or by the degree of graphitization. Typical thermal conductivity of Graphite Typical thermal expansion of Graphite 100 80. Thermal conductivity [%]. Thermal expansion 1). 60. 40. 20. 0 0. 500 1000 2000 3000 500 1000 2000 3000. Temperature [K] Temperature [K]. 1) amount X added to . material data for SIGRAFINE isostatic graphites Typical properties Units R4340 R4500 R4550 R4810 R4820.

10 Average grain size m 15 10 10 20 20. Bulk density g /cm Open porosity Vol. % 15 14 10 11 10. Average pore size m Coefficient of permeability (20 C) cm /s Rockwell hardness HR / 80 HR / 70 HR / 90 HR / 95 HR / 100. Flexural strength MPa 45 50 60 45 50. Compressive strength MPa 90 110 130 100 105. Dynamic modulus of elasticity GPa Thermal conductivity (20 C) Wm- K- 105 90 105 140 125. Thermal expansion (20 200 C) 10- K- Ash content % Standard dimensions of SIGRAFINE isostatic graphites for continuous casting R4340 R4500 R4550 R4810 R4820. 1550 x 410 x 200 mm 1230 x 500 x 400 mm 1230 x 500 x 400 mm 1230 x 510 x 330 mm 1230 x 510 x 330 mm 1230 x 500 x 400 mm 610 x 500 x 400 mm 610 x 500 x 400 mm 610 x 510 x 330 mm 610 x 510 x 330 mm 610 x 500 x 400 mm 150 420 x 1230 mm 380 x 520 mm Other grades and dimensions on request.