Main Data

See also

Fire-clay, mullite, mullite-corundum and corundum refractories of general purpose

Fire clay, mullite, mullite-corundum and corundum general purpose products are designed for laying of various thermal units with maximum operating temperature of 1200-1500 °C

Technical characteristics

 Rate for grade
  ShAK ShA ShB ShSA ShSB ShSV
GOST R 53406-2009 

Mass fraction, %:

Al2O3, minimum

 

33

 

30

 

28

 

32

 

30

 

30
Refractoriness, °С, minimum 1730 1690 1650 1690 1670 1650
Compressive strength, N/mm2, minimum 23 20 15 20 15 13
Open porosity, %, maximum 23 24 30 24 27 30

Residual variation of sizes when heating, %, maximum at:

1400 °C

 

 

0,5

 

 

-

 

 

-

 

 

-

 

 

-

 

 

-
Temperature of initial softening, °С, minimum 1320 1300 - 1300 - -
 Rate for grade
  MLS-62 МКS-72 МКP-72 МКS-90 КS-95
GOST 24704-2015

Mass fraction, %:

Al2O3, minimum

Al2O3, over

Fe2O3, maximum

 

-

62

1,5

 

-

72

1,5

 

-

72

1,5

 

-

90

0,8

 

-

95

0,6
Compressive strength, N/mm2, minimum 25 30 80 50 40
Open porosity, %, maximum 24 24 16 24 24

Residual variation of sizes when heating, %, maximum at:

1500 °C

1600 °C

 

0,4

-

 

-

1,0

 

-

1,0

 

-

-

 

-

-
Temperature of initial softening, °С, minimum 1450 1500 1550 1660 1680

 

                                                             Rate for grade            
  KUF-95 МLU-69 МLU-62
GOST 24704-2015

Mass fraction, %:

Al2O3, over

Fe2O3, maximum

P2O5

 

95

0,5

1,5

 

69

1,0

-

 

62

1,1

-
Compressive strength, N/mm2, minimum 90 50 60
Open porosity, %, maximum 17 19 17

Residual variation of sizes when heating, %, maximum at:

1500 °C

1600 °C

 

-

0,3

 

0,3

-

 

0,4

-
Temperature of initial softening, °С, minimum 1650 1650 1600

 The production according to the GOST R 54312-2011 requirements is allowed.

Limit deviations of brick dimensions 
 Fire-clay bricks
Dimensions for rectangular and shaped products of simple configuration ShA, ShB, ShAK, ShSA, ShSB, ShSV 
I II
mm % mm %
Normal straight and wedge bricks:  
length ±3 - ±4 -
width ±2 - ±2 - 
thickness ±2 - ±2 - 
Shapes:  
Up to 100 mm inc. ±2 - ±2 -
Over 100 to 250 mm inc. ±2 - ±3 -
Over 250 to 300 mm inc. ±3 - ±4 -
Over 300 to 400 mm inc. ±5 - ±6 -
Over 400 mm - ±1,5 - ±2,0
 
 Fire-clay bricks
Dimensions FOR SHAPED PRODUCTS OF COMPLICATED AND EXTREMELY COMPLICATED CONFIGURATIONS OF SHА, SHB, SHAK, SHSA, SHSB, SHSV GRADES
mm %
Up to 100 mm inc. ±3 -
Over 100 mm  - ±2,5

 Fire-clay bricks
Dimensions Limit deviations forMLS-62, MLU-62, MLU-69, MKS-72, MKP-72, MKS-90, MKU-90, KS-95, KUF-95 grades 
mm %
Up to 200 mm inc. ±2 -
Over 200 to 400 mm inc. - ±1,0
Over 400 mm - ±1,5

Form and dimensions GOST 8691-73, with amendments 1-4 *

«In connection with bringing into action of national standards GOST R 51262.1-99 “Refractory rectangular products of general purpose. Form and dimensions” and GOST R 51262.2-99 “Refractory arch products of general purpose. Form and dimensions” the standard number for shape and sizes shall be specified when ordering.».

Straight brick. One-and-a-half straight brick. Three-quarter straight brick.

Number of brickDimensions, mmGroup of complication
  a в б  
Straight brick 
1 230 65 65 3
2 230 65  85  3 
3

230 

 100  114  4 
4 230  75  114  2 
5 230  65  114  1 
6 230  40  114  5 
6a 230 65 150  
7 250 75  124  2 
8 250  65  124  1 
9 300  65  150  2 
10 345  75  150  3 
One-and-a-half straight brick 
11 230  75  172  2 
12 230  65  172  2 
13 250  75  187  3 
14 250  65  187 2 
15 300  65  225  3 
Three-quarter straight brick
16 172  75  114  3 
17 172  65  114  2 
18 187  75  124  3 
19 187  65  124  3 

End arch brick (one-sided and double-sided). One-and-a-half end arch brick (one-sided and double-sided). Side arch brick (one-sided and double-sided).

Number of brickDimensions, mmGroup of complication
  a в в1 б  
End arch brick (one-sided and double-sided)
20 230 75  65  114  4 
21 230 75 55 114 4
22 230 65 55 114 3
23 230 65 45 114 4
23a 230 75 45 150  
24 250 75 65 124 4
25 250 65 55 124 3
26 250 65 45 124 4
27 172 65 55 114 4
28 172 65 45 114 4
29 300 65 55 150 4
30 300 65 45 150 4
31 345 75 65 150 5
32 345 75 55 150 5
One-and-a-half end arch brick (one-sided and double-sided)
33 230 75 65 172 3
34 230 75 55 172 3
35 230 65 55 172 3
36 230 65 45 172 3
37 250 75 65 178 3
38 250 65 55 187 3
39 250 65 45 187 3
40 300 65 55 225 4
41 300 65 45 225 5
Number of brickDimensions, mmGroup of complication
  a в в1 б  
Side arch brick (one-sided and double-sided)
42 230 75  65  114  3 
43 230 75 65 114 3
44 230 65 55 114 2
45 230 65 45 114 2
45a 230 65 55 150  
45b 230 65 45

150

  
46 250 75 65 124 3
47 250 65 55 124 2
48 250 65 45 124 3

Trapezoidal brick (one-sided and double-sided). Trapezoidal diametrical (double-sided) brick.

Number of brickDimensions, mmGroup of complication
  a в б б1  
Trapezoidal brick (one-sided and double-sided)
49 230 65  114  96  3 
50 230 65 114 76 3
51 230 65 114 56 4
52 345 75 150 125 4
53 345 75 150 90 4
54 345 75 150 80 4

Number of brickDimensions, mmGroup of complication
  a a1 в б  
Trapezoidal brick (one-sided and double-sided)
55 230 180  65  114  3 
56 230 190 65 114 3
57 230 200 65 114 3
58 230 210 65 114 3
59 230 220 65 114 3

Skewback brick

Number of brickDimensions, mmAngle, degreeGroup of complication
  a б в г д е  
60 114 114  114  133  34  57 60 6 
61 114 114 114 133 52 33 45 6
62 124 124 124 133 26 62 60 6
63 124 124 124 133 45 36 45 6
64 172 230 114 201 52 144 60 6
65 172 230 114 201 80 109 45 6
66 230 230 114 201 39 68 45 6
67 230 230 114 236 37 115 60 6
68 230 230 114 269 70 115 60 6
69 250 230 124 269 53 105 60 6
70 300 230 75 269 9 80 60 5
71 300 275 75 269 57 63 45 5
72 300 345 75 269 57 133 45 5
73 345 230 75 337 38 57 60 5

Window brick

Number of bricksDimensions, mmGroup of complication
  a a1 б б1  
74 230 30  230  115  6 
75 345 145 172 56 5

Arched pendant keyed brick

Number of brickDimensions, mmGroup of complication
  a б в  
76 - 25  135-2  10 
77 25 - 135-2 10
78 25 25 160-2 10

Pendant brick

Number of bricksGroup of complication
79 10 
80 10
87 7
110 8

Number of bricksDimensions, mmGroup of complication
  a б в г  
88 65  45  230  300  8 
89 45 65 230 300 8
90 65 65 250 320 8

Number of bricka, mmGroup of complication
81 -  6 
82 100 8
83 75 8
84 230 8
85 322 8
86 - 9
91 - 7

Moving bottom brick 

Number of bricka, mmGroup of complication
92 230 7 
93 114 6

Flagstone and bar 

Number of brickDimensions, mmGroup of complication
  a б в  
94 460 230 75  5 
95 575 170 80 6
96 600 230 90 6
97 - - - 8

Burner brick

Number of brickDimensions, mmGroup of complication
  a б в Д d d1  
98-1 230 100  80   150  50 35 8  
98-2
99-1 340 167 120
 190 75 45 9
99-2
100-1 340 167 120
 210 100 45 9
100-2
101-1 340 167 130 240 125 40 9
101-2
102-1 340 167 130 260 150 40 9
102-2

Circle brick

Number of brickDimensions, mmGroup of complication
  a r R  
103 175 200  275  8 
104 188 275 350 8
105 196 350 425 8
106 202 425 500 8
107 208 500 575 8
108 214 650 725 8
109 218 910 985 8

Arched pendant brick 

Number of brickGroup of complication
110 8
111 8

T-type checker and unchecker brick 

Form and dimensions GOST 6024-75 rev. 1-3

Number of brickDimensions, mm
  a a1 б в г к r
39 230 150 114  75  40 25 5
47 350 230 114 75 60 56 5

Unchecker skewback and widen brick  

Form and dimensions GOST 6024-75 rev. 1-3

Number of bricksDimensions, mm
  a в б
50 326 114  400 
51 385 75 459
52 385 90 459
53 385 114 459
56 284 114 138
57 520 75 374
58 520 90 374
59 520 114 374