... P12~P220 4.JIS standard: #12~#220 High quality silicon steelProduct Description Green Silicon Carbide, Silicon ... the good chemistry stability, low heated expansion, high efficiency of heat conductivity, electrical resistance comparing with ... 5 of Moss's, good measure of tensile strength, best efficiency for electric current.DetailsParticle ... -66206855 FAX: 86-22-66288590 High quality silicon steel