Insulating Fire Brick Products

JSS IFB23

Maximum Service Temp: 1230°C
ASTM C155 Grade 23
Low Thermal Conductivity
High Strength

Maximum Service Temp: 1400°C
ASTM C155 Grade 26
Low Thermal Conductivity
High Strength

Maximum Service Temp: 1510°C
ASTM C155 Grade 28
Low Thermal Conductivity
High Strength

Maximum Service Temp: 1620°C
ASTM C155 Grade 30
Low Thermal Conductivity
High Strength

1260–1430°C (ASTM / JIS Equivalent)

Product	Grade / Density	JSS-23-0.6	JSS-23-0.8	JSS-23-0.9	JSS-23-1.0
JSS-23 (23 Mullite Insulation Brick)	Unit
Classification Temperature	°C	1300	1300	1300	1300
Bulk Density	g/cm³	0.6	0.8	0.9	1.0
Permanent Linear Change (1230°C × 12h)	%	-0.5 ~ 0.5	-0.5 ~ 0.5	-0.5 ~ 0.5	-0.5 ~ 0.5
Cold Crushing Strength	MPa	1.0	1.9	2.3	2.8
Thermal Expansion (max @1000°C)	%	0.6	0.6	0.6	0.6
Thermal Conductivity (avg @350°C)	W/m·K	0.18	0.24	0.33	0.38
Al₂O₃	%	40	42	42	42
Fe₂O₃	%	1.0	1.0	1.0	1.0

Product	Unit	JSS-26A-0.8	JSS-26A-0.9	JSS-26A-1.0
JSS-26A (26 Mullite Insulation Brick)
Classification Temperature	°C	1350	1350	1350
Bulk Density	g/cm³	0.8	0.9	1.0
Permanent Linear Change (1350°C × 12h)	%	-0.5 ~ 0.5	-0.5 ~ 0.5	-0.5 ~ 0.5
Cold Crushing Strength	MPa	1.8	2.3	2.8
Thermal Expansion (max @1000°C)	%	0.7	0.7	0.7
Thermal Conductivity (avg @350°C)	W/m·K	0.25	0.33	0.38
Al₂O₃	%	52	52	52
Fe₂O₃	%	0.9	0.9	0.9

Product	Unit	JSS-26B-0.8	JSS-26B-0.9	JSS-26B-1.0
JSS-26B (26 Mullite Insulation Brick)
Classification Temperature	°C	1400	1400	1400
Bulk Density	g/cm³	0.8	0.9	1.0
Permanent Linear Change (1400°C × 12h)	%	-1.0 ~ 0.5	-1.0 ~ 0.5	-1.0 ~ 0.5
Cold Crushing Strength	MPa	2.0	2.3	2.8
Thermal Expansion (max @1000°C)	%	0.7	0.7	0.7
Thermal Conductivity (avg @350°C)	W/m·K	0.25	0.33	0.38
Al₂O₃	%	55	55	55
Fe₂O₃	%	0.8	0.8	0.8

Notes: Values are typical results obtained by standard test methods and are for reference. Custom specifications can be produced upon request.

1430–1760°C (ASTM / JIS Equivalent)

Product	Unit	Low Density	Medium Density	High Density
JSS-28 (28 Mullite Insulation Brick)		JSS-28-0.8	JSS-28-0.9	JSS-28-1.0
Classification Temperature	°C	1510	1510	1510
Bulk Density	g/cm³	0.8	0.9	1.0
Permanent Linear Change (1510°C × 12h)	%	-1.0 ~ 0.5	-1.0 ~ 0.5	-1.0 ~ 0.5
Cold Crushing Strength	MPa	1.8	2.5	2.8
Thermal Expansion (max @1000°C)	%	0.8	0.8	0.8
Thermal Conductivity (avg @350°C)	W/m·K	0.28	0.33	0.38
Al₂O₃	%	65	65	65
Fe₂O₃	%	0.7	0.7	0.7

Product	Unit	JSS-30-0.9	JSS-30-1.0	JSS-30-1.1
Classification Temperature	°C	1550	1550	1550
Bulk Density	g/cm³	0.9	1.0	1.1
Permanent Linear Change (1550°C × 12h)	%	-0.5 ~ 0.5	-0.5 ~ 0.5	-0.5 ~ 0.5
Cold Crushing Strength	MPa	2.3	2.8	3.5
Thermal Expansion (max @1000°C)	%	0.8	0.8	0.8
Thermal Conductivity (avg @350°C)	W/m·K	0.33	0.38	0.48
Al₂O₃	%	70	70	70
Fe₂O₃	%	0.7	0.7	0.7

Product	Unit	JSS-32-1.0	JSS-32-1.1
Classification Temperature	°C	1600	1600
Bulk Density	g/cm³	1.0	1.1
Permanent Linear Change (1600°C × 12h)	%	0.6	0.6
Cold Crushing Strength	MPa	3.0	3.5
Thermal Expansion (max @1000°C)	%	0.8	0.8
Thermal Conductivity (avg @350°C)	W/m·K	0.38	0.48
Al₂O₃	%	73	73
Fe₂O₃	%	0.9	0.9

Notes: Values are typical results obtained by standard test methods and are for reference. Custom specifications can be produced upon request.

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