Project Item

Unit

unit

Indicators index

N-1

N-2a

N-2b

N-3a

N-3b

N-4

N-5

N-6

Refractoriness ≥

℃

1750

1730

1730

1710

1710

1690

1670

1580

0.2MPa load soften temperature ≥

softening temp.under0.2MPa

℃

1400

1350

1320

1300

Reheating linear change

linear change ofre-heating

1400 ℃.2h

%

+0.1 
-0.4

+0.1 
-0.5

+0.2 
-0.5

1350 ℃.2h

+0.2 
-0.5

+0.2 
-0.5

+0.2 
-0.5

+0.2 
-0.5

Apparent Porosity ≤ 
porosity

%

22

24

26

24

26

24

26

28

Cold crushing strength temperature ≥ 
pressure resistance at temp

MPa

29.4

24.5

19.6

19.6

14.7

19.6

14.7

14.7

Thermal shock resistance (1100 ^° C water-cooled)

Secondary

times

Experimental data prove the quality certificate 
The test data is indicated in the quality certificate.