Extract from the Graphite COVA program of molded and isostatically pressed grades

Grade
Standard
Sizes

Bulk
Density

Poro-
sity

Spec. el. Resitance
Com-
pressive
Strength
Bending
Strength
Hard-
ness
Brinell
Hard-
ness
Shore
Ash
Content
Thermal Expansion
Coefficient
Thermal
Conduc-
tivity
   (mm)  (g/cm³) (%)  (Ω mm²/m)  (N/mm²) (N/mm²)  (10/100) (°S)  (%) (10-6/K) (W/mK)
                       
B 497 XN
ø 20 .. 80
1,76 14 14 - 20 60 28 13 43 < 0,1 3,5 - 4,5 90
B 513 XN
ø 25 .. 400,
300x240x500
1,75 16 14 - 20 53 24 11 40 < 0,1 3,5 - 4,5 100
B 520 DXT ø 25 .. 400,
75x150x500
1,83 10 32 - 38 125 42 27 72 < 0,5 4,5 - 5 50
B 525 * ø 50 .. 400,
75x150x500
1,62 18 50 - 60 110 40 24 66 < 1,5 4,5 - 5,5 30
B 527 XN ø 25 .. 135,
75x150x500
1,75 15 13 - 20 57 25 12 42 < 0,1 3,5 - 4,5 95
B 527 DXN
ø 50 .. 300 1,84 11 12 - 16 68 35 14 47 < 0,1 4 - 5 110
B 610 XN
on demand, rectang.,
max.
150x150x500
1,79 12 18 - 21 97 45 20 62 < 0,15 4,7 75
B 613 XN ø 100 .. 350 1,76 15 12 - 16 63 30 12 45 < 0,1 3,8 100
B 640 XN on demand, round, rectangular 1,76 13 16 - 18 79 34 16 50 < 0,15 3,3 80
B 644 XN on demand, only rectangular 1,82 9 11 - 13 92 40 17 53 < 0,1 3,8 105
B 650 XN on demand, only rectangular 1,82 14 13 - 15 103  56 17 58 < 0,1 4,5 90
B 651 XN on demand, only rectangular 1,74 15 14 - 16 93 52 17 55 < 0,1 3,8 90
 - indicated figures to be understoodas average values / typical ranges -
 
* non-graphitised carbon Note: LE 980 is same as B 520 DXT
series 400, 500: molded   series 600: isostatically pressed    
       
 > Further grades, special dimensions and special impregnations on demand<
 
 
... to the extruded grades