300-500mm RP graphite electrode,RP Graphite Electrode,Industrial Graphite Electrode,High Density Graphite Electrodes Manufacturer
,,,
Electric resistivity : 7.5-8.6
Bending strength: >=7.5
Elastic Modulus:<=9
Bulk density:1.54-1.62
Ash:<=0.3
CTE: 2.20-2.60
Regular power graphite electrode is a graphite electrode with allowable current density lower than 17A/cm2. RP graphite electrode is mainly used in the ordinary power electric furnace for steelmaking, silicon smelting and yellow phosphorus refining etc.
Physical and Chemical Index of Hign Power Graphite Electrode: |
||||
Item |
Unit |
HP |
||
300~500 |
550~700 |
|||
Electric Resistivity |
Electrode |
uΩ.m |
||
Nipple |
||||
Bending Strength |
Electrode |
MPa |
≥10.0 |
≥8.5 |
Nipple |
≥18.0 |
|||
Modulus of Elasticity |
Electrode |
GPa |
≤13.0 |
|
Nipple |
≤15.0 |
|||
Bulk Density |
Electrode |
g/cm3 |
||
Nipple |
||||
Ash Content |
Electrode |
% |
≤0.3 |
|
Nipple |
||||
The Coefficient of Thermal Expansion(CTE) |
Electrode |
10-6/℃ |
||
Nipple |
High Power Graphite Electrode Current Carrying Capacity |
|||
Norminal Diameter |
HP |
||
Current Carrying Capacity |
Current Density |
||
inch |
mm |
A |
A/cm2 |
12 |
300 |
13000~17400 |
17~24 |
14 |
350 |
17400~24000 |
17~24 |
16 |
400 |
21000~31000 |
16~24 |
18 |
450 |
25000~40000 |
15~24 |
20 |
500 |
30000~48000 |
15~24 |
22 |
550 |
34000~53000 |
14~22 |
24 |
600 |
38000~58000 |
13~21 |
28 |
700 |
45000~72000 |
12~19 |
32 |
800 |
/ |
/ |
Tolerance of Graphite Electrode Diameter and Length(mm) |
|||||
Nominal Diameter |
Actural diameter |
Length |
|||
in |
mm |
max |
min |
Black surface min |
|
12 |
300 |
307 |
302 |
299 |
1800/2000 |
14 |
350 |
358 |
352 |
349 |
1800/2000/2200 |
16 |
400 |
409 |
403 |
400 |
1800/2000/2200 |
18 |
450 |
460 |
454 |
451 |
1800/2000/2200 |
20 |
500 |
511 |
505 |
502 |
2000/2200/2400 |
22 |
550 |
562 |
556 |
553 |
2000/2200/2400/2700 |
24 |
600 |
613 |
607 |
604 |
2200/2400/2700/3000 |
28 |
700 |
714 |
710 |
707 |
2200/2400/2700/3000 |
29 |
800 |
816 |
812 |
809 |
2200/2400/2700/3000 |
Permissible Deviation of Graphite Electrode Length (mm) |
||||
Nominal Length |
Standard Deviation |
Short Length Deviation |
||
max |
min |
max |
min |
|
1800 |
+100 |
-100 |
-100 |
-275 |
2000 |
+100 |
-100 |
-100 |
-275 |
2200 |
+100 |
-100 |
-100 |
-275 |
2400 |
+100 |
-100 |
-100 |
-275 |
2700 |
+200 |
-150 |
-150 |
-275 |
3000 |
+200 |
-150 |
-150 |
-300 |
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