CHINA graphite electrodes

1.DIAMETERS AVAILABLE: DIAMETER FROM 100MM TO 1050MM.

FOR RP GRADE, THE DIA IS USUALLY 100 -1060MM.
FOR RPI GRADE, THE DIA IS USUALLY 200 -650MM.
FOR HP GRADE, THE DIA IS USUALLY 300-650MM.
FOR SHP GRADE, THE DIA IS USUALLY FROM 400-650MM.
FOR SHP GRADE, THE DIA IS USUALLY FROM 400-650MM.

2. STANDARD GRADES – PROPERTIES: RP, RPI, HP,SHP &  UHP. (GE: ELECTRODES, GN: NIPPLES)
2.1). RP:
RESISTIVITY (UOM ): 8.0 FOR GE, 6.5 FOR GN
BENDING STRENGTH (MPA ): 9.8 FOR GE, 13 FOR GN
BULK DENSITY(G/CM3 ): 1.58 FOR GE, 1.66 FOR GN
C.T.E.(100 -600 C, 10 -6/C ): 2.9 FOR GE, 2.7 FOR GN
ASH: 0.4% FOR GE, 0.2% FOR GN
2.2). RPI:
RESISTIVITY (UOM ): 7.5 FOR GE, 6.2 FOR GN
BENDING STRENGTH (MPA ): 10.0 FOR GE, 14 FOR GN
BULK DENSITY(G/CM3 ): 1.62 FOR GE, 1.70 FOR GN
C.T.E.(100 -600 C, 10 -6/C ): 2.8 FOR GE, 2.6 FOR GN
ASH: 0.3% FOR GE, 0.2% FOR GN
2.3). HP
RESISTIVITY (UOM): 6.5 FOR GE, 5.5 FOR GN
BENDING STRENGTH (MPA ): 11 FOR GE, 15 FOR GN
BULK DENSITY(G/CM3): 1.64 FOR GE, 1.72 FOR GN
C.T.E.(100 -600 C, 10 -6/C ): 2.2 FOR GE, 2.0 FOR GN
ASH: 0.2% FOR GE, 0.1% FOR GN
2.4). SHP
RESISTIVITY (UOM): 6.0 FOR GE, 5.0 FOR GN
BENDING STRENGTH (MPA ): 12 FOR GE, 16 FOR GN
BULK DENSITY(G/CM3): 1.66 FOR GE, 1.75 FOR GN
C.T.E.(100 -600 C, 10 -6/C ): 2.0FOR GE, 1.8 FOR GN
ASH: 0.2% FOR GE, 0.1% FOR GN

2.5). UHP
RESISTIVITY (UOM): 5.5 FOR GE, 4.2 FOR GN
BENDING STRENGTH (MPA): 18 FOR GE, 20 FOR GN
BULK DENSITY(G/CM3): 1.68 FOR GE, 1.78 FOR GN
C.T.E.(100 -600 C, 10 -6/C): 1.6 FOR GE, 1.4 FOR GN
ASH: 0.1% FOR GE, 0.1% FOR GN

3. CURRENT CARRYING CAPACITIES:
3.1).FOR RP GRADE:
DIA    CAPACITY   CURRENT DENSITY
(MM)       (A)                (A/cm2)
100  1500-2400             19-30
130  2200-3400             17-26
150  3500-4900             16-25
175  4000-5500             16-22
200  5500-7500             15-21
225  6000-8200             15-20
250  7500-10500           14-20
300  10000-14000         14-18
350  13000-19000         14-18
400  19000-24500         14-18
450  24000-29000         13-17
500  27000-34000         13-16
550  32000-39500         13-16
600  38000-47000         11-14
650  45000-55000         13-16
700  52000-65000         11-14
750  59500-73000         13-16
800: 70000-83000      14-17
850: 70000-83000      14-17
3.2) FOR HP GRADE
DIA  CAPACITY     CURRENT DENSITY
(MM)      (A)                (A/cm2)
200  6500-10500           18-25
225  8000-12500           18-25
250  9500-14000           18-25
300  14000-19000          17-24
350  17500-25000          17-24
400  22500-33500          16-24
450  28000-43500          15-24
500  33000-51500          15-24
550  37000-58000          14-23
600  44000-67500          14-23650  51500-75500          15-22700  60000-87000          15-22750  68400-100000        15-22
2.3). FOR UHP GRADE
DIA  CAPACITY   CURRENT DENSITY
(MM)      (A)                 (A/cm2)
300  17000-24000           20-30
350  22000-32000           20-30
400  26000-42000           19-30
450  33000-46000           19-27
500  39000-57000           18-27
550  45000-64000           17-25
600  52000-76000           16-24650  62000-86000           18-25700  71000-99000           18-25750  82000-114000         18-25

NOTE: RPI IS BETWEEN RP AND HP, SHP IS BETWEEN HP AND UHP.