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Product JM 23 JM 26 JM 28 JM 30 JM 32 Temperature Rating (℃) 1260 1430 1540 1650 1760 Density (kg/㎥) 480 780 880 1020 1250 Cold Crushing Strength
(ASTM-C-93-84), kg/㎠11.5 16 21 25 35 Thermal Conductivity (ASTM-C-182-83)
at Mean Temperature of: (W/mk)400℃ 0.14 0.27 0.32 0.41 0.49 600℃ 0.16 0.29 0.34 0.43 0.50 800℃ 0.18 0.31 0.36 0.44 0.51 1000℃ 0.20 0.33 0.38 0.45 0.53 1200℃ 0.35 0.41 0.47 0.56 1400℃ - - - 0.60 Chemical Analysis(%) AL2O3 37.0 58.0 67.1 73.4 77.0 SiO2 44.4 39.1 31.0 25.1 21.5 Fe2O3 0.7 0.7 0.6 0.5 0.3 TiO2 1.2 0.1 0.1 0.1 tr CaO tr = trace 15.2 0.1 0.1 tr tr MgO tr = trace 0.3 0.2 0.1 tr 0.1 Na2O + K2O 1.1 1.7 0.9 0.9 0.9
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