It’s all about the right balance. With its leading experience in EDM, Mersen has developed a complete range of graphite grades aiming to answer to the widest range of electrode designs and workpiece materials. The selection of the right graphite grades will depend on numerous factors. Mersen’s expertise will guide you to the proper conclusion. There are 4 key factors that will largely impact your selection. WEAR RESISTANCE METAL REMOVAL RATE Or how long will the electrode be able to maintain the level of details during the spark erosion process? Or how fast will the graphite electrode remove...

it is much easier to fabricate an electrode out of graphite than copper 5 times lighter graphite has a low density so electrodes weigh less. This is a critical factor as electrodes become larger Greater geometrical stability due to its low Coefficient of Thermal Expansion graphite will not expand as much as copper, allowing it to maintain its critical dimensions Metal Removal Rate is doubled graphite has a metal removal rate 2 times higher than copper with lower electrode wear Much less Wear graphite does not melt but sublimes at 3,400° C, providing much greater wear resistance than the low melting...

UN I VE R SA L FINE GRAIN G R A DE For high metal removal rate with excellent performance ratio YOUR BENEFITS: Production cycles shortened with high removal rate capacities Excellent machinability Best choice for medium surface finish Ellor® +15 recommended for die casting molds in aluminium WEAR RESISTANCE 3/5 METAL REMOVAL RATE

GRAIN SIZE inch μm HARDNESS SHORE HARDNESS ROCKWELL ELECTRICAL RESISTIVITY µohm.cm ohm.inch

UN I VE R SA L SUP E R F I N E G R A I N GR ADE YOUR BENEFITS: Good removal rate capabilities Superior strength and wear resistance characteristics for longer life time Easy to machine Excellent surface finish up to 1,6 Ra(µm) WEAR RESISTANCE 4/5 METAL REMOVAL RATE

GRAIN SIZE inch μm HARDNESS SHORE HARDNESS ROCKWELL ELLOR® + 25 also exists in copper impregnated graphite grade for a higher electrical conductivity and improved performance ELECTRICAL RESISTIVITY µohm.cm ohm.inch

E XC E P TI O NAL SUP E R F I N E G R A I N GR ADES for outsta nding p erforma nces YOUR BENEFITS: Exceptional surface finish up to 0,56 Ra(µm) Outstanding strength and wear resistance to keep a high performance even with intricate designs Excellent Metal Removal Rate (MRR) Preferred grades from mobile phone manufacturers WEAR RESISTANCE WEAR RESISTANCE 4,5/5 METAL REMOVAL RATE METAL REMOVAL RATE

GRAIN SIZE inch μm HARDNESS SHORE HARDNESS ROCKWELL ELECTRICAL RESISTIVITY µohm.cm ohm.inch

THE P R E MI UM ULTRAFINE GRAIN G R A P HI TE YOUR BENEFITS: Exceptional surface finish up to 0,40 Ra(µm) Outstanding strength and wear resistance to keep a high performance even with intricate designs WEAR RESISTANCE 5/5 METAL REMOVAL RATE

GRAIN SIZE inch μm HARDNESS SHORE HARDNESS ROCKWELL ELECTRICAL RESISTIVITY µohm.cm ohm.inch

A COMPLETE OFFERING OF EDM GRADES TO COVER ALL YOUR NEEDS AVERAGE GRAIN SIZE HARDNESS HARDNESS ROCKWELL SHORE FLEXURAL STRENGTH ELECTRICAL RESISTIVITY MAXIMUM BLOCK SIZES

RECOMMENDED GRADES SUITABLE APPLICABLE WIRE EDM DEEP HOLES FINES RIBS STEEL REFRACTORY STEEL TITANIUM, MOLYBDENUM, COOPER TUNGSTEN, CARBIDE SURFACE FINISH ACHIEVABLE ON STEEL WITH ELLOR® GRAPHITE FINISHING MODE

READY TO CLAMP ELECTRODES SQUARE BAR, ROUND BARS AND FOIL SHEETS Data herein contained are provided for general information purpose only and are not binding. Mersen shall have no liability whatsoever with respect to information contained herein. Duplication, reproduction or translation of any information contained herein, in whole or in part, is strictly prohibited without prior written consent of Mersen. Our materials are in conformity with the RoHS-Directive (Restriction of the use of certain Hazardous Substances in electrical and electronic equipment). Besides Mersen guarantees the application...

OUR RECOMMENDATIONS TO GET THE MOST OF ELLOR® ELECTRODES Good EDM results require not only the proper selection of EDM material, but also proper machine settings, such as peak current, on time, off time, gap size, electrode polarity and most importantly the flushing conditions. TIPS FOR ERODING WITH GRAPHITE ELECTRODES CURRENT AND VOLTAGE SCHEMATIC VIEW High discharge current causes high erosion and a rough surface SIZING Low discharge current causes a low removal and a fine surface SURFACE ROUGHNESS CONTOUR AND DIMENSIONAL ACCURACY VOLTAGE DISCHARGE High discharge current causes high erosion...

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