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Technical Indicate of SSIT Graphite Electrode
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Nominal Diameter
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RP
|
HD
|
HP
|
UHP
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mm
|
A
|
A/cm2
|
A
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A/cm2
|
A
|
A/cm2
|
A
|
A/cm2
|
|
75
|
1000-1400
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22-31
|
1300-2000
|
29-45
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|
|
|
|
|
100
|
1500-2400
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19-30
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1800-3000
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22-37
|
|
|
|
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|
130
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2200-3400
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17-26
|
2800-4200
|
21-31
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|
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|
150
|
3000-4500
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16-25
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4000-5000
|
22-28
|
|
|
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|
|
200
|
5000-6900
|
15-21
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4800-9000
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15-28
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5500-9000
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18-25
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250
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7000-10000
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14-20
|
8000-12000-
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16-24
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8000-13000
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18-25
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300
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10000-13000
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14-18
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11000-16000
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15-22
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13000-17400
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17-24
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15000-22000
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20-30
|
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350
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13500-18000
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14-18
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15000-22000
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15-22
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17400-24000
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17-24
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20000-30000
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20-30
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400
|
18000-23500
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14-18
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20000-28000
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15-22
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21000-31000
|
16-24
|
25000-40000
|
19-30
|
|
450
|
22000-27000
|
13-17
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24000-34000
|
15-21
|
25000-40000
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15-24
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32000-45000
|
19-27
|
|
500
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25000-32000
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13-16
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28000-420000
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13-20
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30000-48000
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15-24
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38000-55000
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18-27
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Nomal Size of Taper Nipple
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Nominal Diamete
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IEC Code
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Size (mm)
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Four Circles of Threads per inch
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Æ
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D
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L
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200
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122 T4N
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122.24
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177.80
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250
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152 T4N
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152.40
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190.50
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300
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177 T4N
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177.80
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215.90
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350
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203 T4N
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203.20
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254.00
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400
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222 T4N
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222.25
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304.80
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400
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222 T4L
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222.25
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355.60
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450
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241 T4N
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241.30
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304.80
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450
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241 T4L
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241.30
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355.60
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500
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269 T4N
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269.88
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355.60
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500
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269 T4L
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269.88
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457.20
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600
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317 T4N
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317.50
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355.60
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600
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317 T4L
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317.50
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457.20
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Nominal Diameter
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Three Circles of Threads per inch
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250
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155 T3N
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155.57
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220.00
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300
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177 T3N
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177.16
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270.90
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350
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215 T3N
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215.90
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304.80
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400
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241 T3N
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241.30
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338.70
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450
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273 T3N
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273.05
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355.60
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500
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298 T3N
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298.45
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372.60
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Size and Permissible Variation of SSIT Graphite Electrode
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Diameter (mm)
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Length (mm)
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Nominal Diameter
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Actual Diameter
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Nominal Length
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Permissible Variation
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mm
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Inch
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mm
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Inch
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Nominal Length
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Undergauge Length
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200
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8
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203+2
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1600
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60
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+100
|
-275
|
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250
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10
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254+2
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1600 1800
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60 72
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+100
|
-2755
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300
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12
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305+2
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350
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14
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355+2
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400
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16
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407+2
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1800 2000
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72 79
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+100
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275
|
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450
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18
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458+2
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500
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20
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509+2
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600
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24
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610+2
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Technical Indicate of SSIT Graphite Electrode
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Item
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Unit
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RP
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HD
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HP
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UHP
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Ø250- Ø400mm
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Ø450- Ø500mm
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Ø250- Ø400mm
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Ø450- Ø500mm
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Ø250- Ø400mm
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Ø450- Ø500mm
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Ø250- Ø400mm
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Ø450- Ø500mm
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Resistivity
|
Electrode
|
μΩ.m
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7.0-9.0
|
7.0-9.5
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5.0-7.0
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5.5-7.5
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4.8-6.2
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5.0-6.5
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4.0-5.5
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4.0-5.8
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Nipple
|
4.0-5.8
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3.0-4.5
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3.0-4.5
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3.0-4.0
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Flexural Strength
|
Electrode
|
Mpa
|
7.0-9.0
|
7.0-10.0
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10.0-15.0
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10.0-15.0
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10.5-16.0
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Nipple
|
17.0-25.0
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19.0-27.0
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19.0-27.0
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20.0-28.0
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Elastic Modulus
|
Electrode
|
Gpa
|
6.0-9.3
|
8.0-12.0
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8.0-112.0
|
9.0-14.0
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Nipple
|
11.0-14.0
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12.0-16.0
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12.0-16.0
|
14.0-18.0
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ash
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%
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01.-0.5
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0.1-0.3
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0.1-0.3
|
0.1-0.3
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Bulk density
|
Electrode
|
g/cm3
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1.54-1.62
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1.64-1.72
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1.64-1.72
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1.7-1.75
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Nipple
|
1.70-1.80
|
1.74-1.82
|
1.74-1.82
|
1.76-1.84
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CTE
|
Electrode
|
10-6/ oC (100 - 1000 oC)
|
1.8-2.5
|
1.7-2.3
|
1.6-2.0
|
1.2-1.5
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Nipple
|
1.5-2.2
|
1.3-1.6
|
1.3-1.6
|
1.3-1.6
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