I-calcined needle coke yahluke kakhulu kwi-sponge coke, inoxinano olukhulu, ubumsulwa obuphezulu, amandla aphezulu, umxholo wesalfure ophantsi, amandla aphantsi okuthambisa, i-thermal expansion coefficient ephantsi kunye nokumelana okuhle nokutshayiswa kobushushu.