Physical and chemical index:
SK Standard ↓
Item/Grade
SK-32
SK-34
SK-36
SK-37
SK-38
AL2O3 % (≥)
35
38
55
65
70
Fe2O3 % (≤)
2.5
2.5
2.0
2.0
2.0
Refractoriness(SK)
32
34
36
37
38
Refractoriness under load, 0.2MPa, °C(≥)
1300
1360
1450
1480
1530
Apparent porosity (%)
22-24
20-22
20-23
20-23
20-22
Bulk density (g/cm³)
1.95-2.1
2.1-2.2
2.25-2.4
2.3-2.5
2.4-2.6
Cold crushing strength ,MPa (≥)
25
30
45
50
60
Thermal expansion at 1000°C (%)
0.6
0.6
0.3
0.3
0.2
Application:Common sizes:Arch type
Wedge type
LxWxH (mm)LxWxH/h (mm)LxWxH/h (mm)Other sizes according to customer requirements