SNF ELECTRODES
SPECIFICATION
1-a. Specification of RP Electrodes
| ltems | Unit | Nominal diameter(mm) | ||||||||
| 75-130 | 150-200 | 250-300 | 350-500 | |||||||
| High | First | High | First | High | First | High | First | |||
| Specific resistance not over |
Electrode Nipple |
¦Ì¦¸.m | 8.5 | 10.0 | 9.0 | 10.5 | 9.0 | 11.0 | 9.0 | 11.0 |
| 8.5 | 8.5 | 8.5 | 8.5 | |||||||
| Transverse strength not below |
Electrode Nipple |
MPa | 9.8 13.0 |
9.8 13.0 |
7.8 13.0 |
6.4 13.0 |
||||
| Elastic modulus not over |
Electrode Nipple |
GPa | 9.3 14.0 |
9.3 14.0 |
9.3 14.0 |
9.3 14.0 |
||||
| Ash content not over |
Electrode Nipple |
% | 0.5 | 0.5 | 0.5 | 0.5 | ||||
| Bulk density not below |
Electrode Nipple |
g/cm3 | 1.58 16.3 |
1.52 16.3 |
1.52 16.3 |
1.52 16.3 |
||||
| (C.T.E) not over |
Electrode Nipple |
10-6 1/ | 2.9 2.7 |
2.9 2.7 |
2.9 2.8 |
2.9 2.8 |
||||
1-b. RP allowable current
| Nominal diame-ters | Allowable current | |
|---|---|---|
| mm | A | A/cm2 |
| 200 250 300 350 400 450 500 | 5000-6900 7000-10000 10000-13000 13500-18000 18000-23500 22000-27000 25000-32000 | 15-21 14-20 14-18 14-18 14-18 13-17 13-16 |
2. Specification of IP
| ltems | Unit | Nominal diameter (mm) | ||||
|---|---|---|---|---|---|---|
| 75-130 | 150-200 | 250-350 | 400-500 | |||
| Specific resistance not over |
Electrode Nipple |
¦Ì¦¸.m | 6.5 6.0 |
7.0 6.5 |
7.0 6.5 |
7.0 6.5 |
| Transverse strength not below |
Electrode Nipple |
MPa | 12.0 15.0 |
11.0 14.0 |
10.0 14.0 |
10.0 14.0 |
| Elastic modulus not over |
Electrode Nipple |
GPa | 12.0 15.0 |
11.0 14.0 |
11.0 14.0 |
11.0 14.0 |
| Bulk density not below |
Electrode Nipple |
g/cm3 | 1.64 1.73 |
1.64 1.73 |
1.60 1.73 |
1.60 1.73 |
| Ash content not over |
Electrode Nipple |
% | 0.3 | 0.3 | 0.3 | 0.3 |
| (C.T.E) not over |
Electrode Nipple |
10-6/C | 2.2 2.4 |
2.2 2.4 |
2.2 2.4 |
2.2 2.4 |
3-a. Specification of HP
| ltems | Unit | Nominal diameter | ||
| 300-400 | 450-500 | |||
| Specific resistance not over | Electrode Nipple |
¦Ì¦¸.m | 7 6.5 |
7.5 6.5 |
| Transverse strength not below | Electrode Nipple |
MPa | 10.5 14.0 |
9.8 14.0 |
| Elastic modulus not over | Electrode Nipple |
GPa | 12.0 16.0 |
12.0 16.0 |
| Ash content not over | Electrode Nipple |
% | 0.3 | 0.3 |
| Bulk density not below | Electrode Nipple |
g/cm3 | 1.60 1.70 |
1.60 1.70 |
| (C.T.E)not over | Electrode Nipple |
10-6 1/ | 2.4 2.2 |
2.40 2.2 |
3-b. HP allowable current
| Nominal Diameters |
Allowable current | Current density |
|---|---|---|
| mm | A | A/cm2 |
| 300 | 13000-17400 | 17-24 |
| 350 | 17400-24000 | 17-24 |
| 400 | 21000-31000 | 16-24 |
| 450 | 25000-40000 | 15-24 |
| 500 | 30000-48000 | 15-24 |
4-a. Specification of UHP
| ltems | Unit | Nominal diameter | ||
| 350-400 | 450-500 | |||
| Specific resistance not over | Electrode Nipple |
¦Ì¦¸.m | 6.2 5.5 |
6.5 5.5 |
| Transverse strength not below | Electrode Nipple |
MPa | 10.5 16.0 |
10.0 16.0 |
| Elastic modulus not over | Electrode Nipple |
GPa | 14.0 18.0 |
14.0 18.0 |
| Ash content not over | Electrode Nipple |
% | 0.3 | 0.3 |
| Bulk density not below | Electrode Nipple |
g/cm3 | 1.65 1.72 |
1.64 1.70 |
| (C.T.E)not over | Electrode Nipple |
10-6 1/ | 1.5 1.4 |
1.5 1.4 |
4-b. UHP allowable current
| Nominal Diameters |
Allowable current | |
| mm | A | A/cm2 |
| 350 400 450 500 |
20000-30000 25000-40000 32000-45000 38000-55000 |
20-30 19-30 19-27 18-27 |