1,Sic 99%max 2,ISO9001 ♦ The black silicon carbide is of high hardness, brittleness.♦ ... from quartz sand ,petroleum coke and anthracite at high temperature.2. Applications:♦ Low tensile strength material. eg. glass, china. ♦ Ceramics, resin ... 12#-90# 100#-180# 220# -240# w63 - w20# w14 - w598.5 98.0 97.0 96.0 93.00.20 0 ... .70P P12 - P100 P120 - P150 P180 - P220 P240# - 1200# 98.5 98.0 97.0 92.0 0.20 0.30 ...