Semi GPC (SGPC) imachokera ku gawo loteteza kutentha la uvuni wa acheson. Kutentha kwa graphitization kuli pakati pa 1700-2500ºC. Ndi gawo la themedium temperature graphitization product. Ndi recarburizer yotsika mtengo yokhala ndi carbon yokhazikika kwambiri, sulfure yochepa, kusungunuka mwachangu komanso kuyamwa kwakukulu.