GrafTech Subsidiary AET Approved on Linux Networx Heat Sink Design.

CLEVELAND -- Advanced Energy Technology (AET), a leading producer of electronic thermal management solutions under its eGRAF(R) brand name, has been approved for production on a new HS-400 Heat Sink design in the next-generation LS/X supercomputer from Linux Networx. The complete thermal solution combines four eGRAF(R) HS-400 natural graphite heat sinks with two eGRAF(R) SPREADERSHIELD(TM) natural graphite pieces.

AET's team of thermal engineers created a custom thermal solution for Linux, offering consultation services throughout the entire thermal design cycle. As a result of AET's intensive planning, testing and modeling process, Linux engineers discovered that the original total number of heat sink fins could be reduced, while maintaining performance and improving airflow in the system. AET also found that adding a SPREADERSHIELD(TM) heat spreader component would reduce the temperature of the power supply chip by 10 degrees C and maintain better long-term reliability. Overall, AET's HS-400 heat sink design significantly increased power by nearly 40% within the same form function.

Andy Reynolds, Lead Applications Engineer for AET, explained the key benefit of the new design. "The biggest advantage of our HS-400 Heat Sink over the traditional design is a weight savings of about 50%. With Linux's side-mounted design, an all-copper heat sink was just too heavy. Our lightweight solution improved mechanical shock and vibration performance and resolved issues with the mounting hardware."

Dave Turner, Senior Mechanical Engineer for Linux, shares excitement for the new approach. "We have been very impressed with the high quality of innovative thermal engineering and design in AET products. Their expertise has been invaluable in overcoming our increased maximum power dissipation requirements within existing space limitations. Linux and AET have continued to work collaboratively to solve upcoming thermal challenges in next-generation products."

About Advanced Energy Technology, Inc.

A subsidiary of GrafTech International Ltd. (NYSE: GTI), Advanced Energy Technology, Inc. (AET) is part of a global company with more than 100 years of experience in carbon and graphite. AET manufactures a wide range of natural graphite products for industry-leading companies around the world under its eGRAF(R), GRAFCELL(R), GRAFOIL(R) and GRAFGUARD(R) branded product lines. The company provides award-winning solutions for thermal management, fuel cell, industrial and automotive fluid sealing applications within the consumer and industrial electronics, military, telecommunications, transportation, power generation and petrochemical industries. For additional information about AET, visit the company's website at www.graftechaet.com.

About GrafTech International Ltd.

GrafTech International Ltd. (NYSE: GTI) is one of the world's largest manufacturers and providers of high quality synthetic and natural graphite and carbon based products and technical and research and development services, with customers in about 80 countries engaged in the manufacture of steel, aluminum, silicon metal, automotive products and electronics. The company manufactures graphite electrodes and cathodes, products essential to the production of electric arc furnace steel and aluminum. GrafTech also manufactures thermal management, fuel cell and other specialty graphite and carbon products for, and provides services to, the electronics, power generation, semiconductor, transportation, petrochemical and other metals markets. GrafTech is the leading manufacturer in all of its major product lines, with 13 state of the art manufacturing facilities strategically located on four continents. For additional information on GrafTech International, visit the company's website at www.graftech.com.

Except for historical information, the matters discussed in this press release are forward-looking statements relating to our business. Forward-looking statements are based on management's expectations as of the date hereof. Actual results may differ materially from those expressed or implied by the forward-looking statements. We have no obligation to update any of the information contained or referenced in this press release.