1. graphite electrode grade: RP HP SHP UHP. 2. diameter:50-600mm (2-14 inch ). 3. lenth: as customers' request .
Technical properties of RP graphite electrode
physical and chemical index
Item |
unit | Nominal Diameter | |||
YB/T4088-2000 Industry standard |
Typical Values | ||||
250-300 | 350-550 | 300-550 | |||
Electric resistivity | Electrode | µ Ω m | ≤ 9.0 | ≤ 9.0 | 7.4-8.8 |
Nipple | ≤8.5 | ≤8.5 | 4.4-5.5 | ||
Bending strength | Electrode |
Mpa | ≥7.8 | ≥6.4 | ≥8.0 |
Nipple | ≥13.0 | ≥13.0 | ≥15.0 | ||
Elastic modulus | Electrode |
Gpa | ≤9.3 | ≤9.3 | ≤9.0 |
Nipple | ≤14.0 | ≤14.0 | ≤13.0 | ||
Bulk density | Electrode |
g/cm3 | ≥1.52 | ≥1.52 | 1.55-1.60 |
Nipple | ≥1.68 | ≥1.68 | 1.70-1.76 | ||
Ash | Electrode |
% | ≤0.5 | ≤0.5 | ≤0.3 |
Nipple | |||||
CTE(100-600) | Electrode | 10-6 | ≤2.9 | ≤2.9 | 2.0-2.6 |
Nipple | ≤2.8 | ≤2.8 | 1.5-1.8 | ||
2. Recommended current carrying capacity
Nominal Diameter | YB/T4088-2000 Industry standard | Typical values | |||
Current carrying capacity
| Current density
|
Electrical Arc furnace | |||
Current carrying capacity |
Current density | ||||
in | mm | A | A/cm2 | A | A/cm2 |
12 | 300 | 10000-13000 | 14-18 | 11000-15000 | 15-21 |
14 | 350 | 13500-18000 | 14-18 | 15000-20000 | 15-20 |
16 | 400 | 18000-23500 | 14-18 | 19000-26000 | 15-20 |
18 | 450 | 22000-27000 | 13-17 | 23000-31000 | 14-19 |
20 | 500 | 25000-32000 | 13-16 | 28000-36000 | 14-18 |
22 | 550 | 30000-40000 | 12-16 | 32000-42000 | 13-17 |
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RP graphite electrode
