Pre-masonry magnesia-chrome bricks

XDMG-A

XDMG-B

XDMG-M

XDMG-M2

XDMG-P1

XDMG-P2

XDMG-RB

MgO≥℅

65

55

55

62

60

60

70

Cr₂O₃≥℅

23

20

21

17

15

18

10

Al₂O₃≥℅

6

SiO₂≤℅

1.5

1.8

2

2

2

2

Fe₂O₃≤℅

5.5

14.5

CaO≤℅

2.5

2.9

1.3

1.3

Cold crushing strength 

55

45

40

30

50

50

30

Modulus of rupture

1.0

Bulk density 

3.2

3.2

3.2

3.18

3.15

3.18

2.92

Refractoriness under load 

1700

1700

1700

1650

1600

1600

1550

Apparent porosity 

18

18

18

18

18

18

21