standards: graphite sheet thickness:0.1~3.2mm graphite board thickness: 0.127～3.2mm property: firm resistance to high or low temperature,radiation as well as to corrosion,excellent self-lubrecity,low frictio coefficient,unusual flexibility and resiliency. usage:being widely used in kinetic and static sealing for machine,pipe pump and valve in power industry,oil industry,chemical industry,light industry as well as machinery industry.it is an ideal new type of sealing material material which can replace traditional sealing material such as rubber or fluorated plastics and abestos,etc. technical index : item classa classb classc 0.7~1.1g/cm3 tolerance of density ±0.03 ±0.04 ±0.05 0.2~1.5mm tolerance of thickness ±0.02 ±0.03 ±0.04 carbon content(%) 99.9 99.5 99 (mpa) tensile strength ≥4.0 (mpa) compressive strength ≥160 compressive rate(%) ≥40 elastic rate(%) ≥12 (ppm) sulphur content - ≤500 ≤1000 (ppm) chlorine content ≤30 ≤40 ≤50