HYSIL BLOCKS SPECIFICATION
GRADES
Max. Recommended Operating Temp. °(C)
H-800 – 800
H-1000 – 1000
H-1100 – 1100

SIZES
Thickness (in mm)
25, 40, 50, 65, 75 & 100
Standard Size (in mm)
1000×500
900×600
600×15
500×150
450×150

HYSIL TECHNICAL SPECIFICATIONS (BLOCKS)
PRODUCT NAME | H-800 Grade | H-1000 Grade | H-1100 Grade | ||||||||||
PROPERTIES | UNIT | Specified Value | Standard Value | Specified Value | Standard Value | Specified Value* | Standard Value** | ||||||
Temperature, max service | Deg C | – | 800 | 927 | 950 | – | 1050 | ||||||
Density, dry | kg/m3 | 352 max | ≤ 300 | 352 max | ≤ 352 | 352 max | ≤ 352 | ||||||
Flexural strength, (min.) | kN/m2 | 344 min. | ≥ 344 | 344 | ≥ 344 | 344 min. | ≥ 344 | ||||||
** Compressive Strength,at min 5% deformation | kPa | 688 min. | ≥ 688 | 688 min. | ≥ 688 | 688 min. | ≥ 688 | ||||||
Soaking heat linear shriankage, at 12 hours | Deg C | 2% max. | <2% at 800 °C | 2% max. | <2% at 950 °C | 2% max. | <1.5% at 1050 °C | ||||||
Mass Loss by Tumbling | % | ||||||||||||
a) after 1st 10 min. | 20% max. | <20% | 20% max. | <20% | 20% max. | <20% | |||||||
b) after 2nd 10 min. | 40% max. | <40% | 40% max. | <40% | 40% max. | <40% | |||||||
Moisture content, by weight | % | 20% max. | <20% | 20% max. | <20% | 20% max. | <20% | ||||||
Apparent Thermal Conductivity | W/mk | ||||||||||||
204o C mean temp. | 0.088 max | <0.079 | 0.088 max | <0.079 | 0.088 max | <0.088 | |||||||
316o C mean temp. | 0.097 max | <0.095 | 0.097 max | <0.095 | 0.097 max | <0.097 | |||||||
371o C mean temp. | 0.101 max | <0.101 | 0.101 max | <0.101 | 0.101 max | <0.101 | |||||||
427o C mean temp. | – | – | 0.105 max | <0.105 | 0.105 max | <0.105 | |||||||
482o C mean temp. | – | – | 0.108 max | <0.108 | 0.108 max | <0.108 | |||||||
500o C mean temp. | – | – | 0.110 max | <0.110 | – | – | |||||||
538o C mean temp. | – | – | – | – | 0.111 max | <0.111 | |||||||
Surface Burning Charteristics | |||||||||||||
a) Flame Spread index | max | 0 | 0 | 0 | 0 | 0 | 0 | ||||||
b) Smoke density index | max | 0 | 0 | 0 | 0 | 0 | 0 | ||||||
*Refrence values pertain to ASTM C533 Type II for 927°C locks ** Products developed through in-house R&D. ASTM does not specify any standards | |||||||||||||
Calcium Silicate products offered here exceed the performance requirements of IS 9428 / 8154, as well as BS-3958 Part II &ASTM C-533. The values quoted are from laboratory tests on typical samples and represent averages.They should not be used as maxima or minima in specifications. | |||||||||||||