UHP 700mm Graphite Electrode
700mm UHP graphite electrode is made of high quality needlelike coke, which is formed, roasted, impregnated, graphitized and machineprocessed as a high quality conductive material for electric arc furnace. UHP 700mm graphite electrode, The allowable current capacity is 73000 ~ 96000A, the allowable current density is 18-24A/㎡ . It is designed for superpower electric arc furnace steelmaking.
Note: It is recommended that the current capacity be -10% for electric furnace and +10% for ladle furnace.
| Comparison Technical Specification for UHP Graphite Electrode 28" | ||
| Electrode | ||
| Item | Unit | Supplier Spec |
| Typical Characteristics of Pole | ||
| Nominal Diameter | mm | 700 |
| Max Diameter | mm | 714 |
| Min Diameter | mm | 710 |
| Nominal Length | mm | 2200-2700 |
| Max Length | mm | 2300-2800 |
| Min Length | mm | 2100-2600 |
| Bulk Density | g/cm3 | 1.68-1.72 |
| transverse strength | MPa | ≥10.0 |
| Young' Modulus | GPa | ≤13.0 |
| Specific Resistance | µΩm | 4.5-5.4 |
| Maximum current density | KA/cm2 | 18-24 |
| Current Carrying Capacity | A | 73000-96000 |
| (C.T.E) | 10-6℃ | ≤1.2 |
| ash content | % | ≤0.2 |
| Typical Characteristics of Nipple (4TPI) | ||
| Bulk Density | g/cm3 | 1.80-1.86 |
| transverse strength | MPa | ≥24.0 |
| Young' Modulus | GPa | ≤20.0 |
| Specific Resistance | µΩm | 3.0～3.6 |
| (C.T.E) | 10-6℃ | ≤1.0 |
| ash content | % | ≤0.2 |
|
Allowable current load for ultra-high power graphite electrodes |
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|
nominal diameter |
allowable current |
nominal diameter |
allowable current |
||
|
mm |
A |
A/㎡ |
mm |
A |
A/㎡ |
|
250 |
9000～14000 |
18～25 |
500 |
38000～55000 |
18～27 |
|
300 |
15000～22000 |
20～30 |
550 |
45000～65000 |
18～27 |
|
350 |
20000～30000 |
20～30 |
600 |
52000～78000 |
18～27 |
|
400 |
25000～40000 |
16～24 |
650 |
70000～86000 |
21～25 |
|
450 |
32000～45000 |
19～27 |
700 |
73000～96000 |
18～24 |
|
Ultra high power graphite electrode and joint standard |
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|
items |
unit |
nominal diameter（mm） |
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|
250～400 |
450～550 |
600～700 |
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|
specific resistance |
electrode nipple |
μ Ω•m |
4.8～5.8 3.4～4.0 |
4.5～5.6 3.4～3.8 |
4.5～5.4 3.0～3.6 |
|
transverse strength |
electrode nipple |
MPa |
≥12.0 ≥22.0 |
≥12.0 ≥22.0 |
≥10.0 ≥24.0 |
|
elastic modulus |
electrode nipple |
GPa |
≤13.0 ≤18.0 |
≤13.0 ≤18.0 |
≤13.0 ≤20.0 |
|
ash content |
electrode nipple |
% |
≤0.2 |
≤0.2 |
≤0.2 |
|
bulk density |
electrode nipple |
g/m³ |
1.68～1.73 1.78～1.84 |
1.68～1.72 1.78～1.84 |
1.68～1.72 1.80～1.86 |
|
（C.T.E) |
electrode nipple |
10℃ |
≤1.2 ≤1.0 |
≤1.2 ≤1.0 |
≤1.2 ≤1.0 |