I-coke yenaliti ene-calcined ihluke kakhulu ku-sponge coke endaweni, ene-high density, ukuhlanzeka okuphezulu, amandla aphezulu, okuqukethwe kwesibabule esiphansi, umthamo ophansi we-ablative, i-coefficient ephansi yokwandisa okushisayo kanye nokumelana nokushaqeka okuhle kokushisa.