Grate electrode, a conductor that releases electric energy in the form of an electric arc, is used to heat and melt the steel scraps in an electric arc furnace. They are currently the only products with high electrical conductivity and are able to maintain extremely high heat generation in this demanding environment. With the growing demand for quality steel in the aerospace, automotive and electronics industries, grate electrodes are also becoming increasingly popular.
Specifications of UHP Grate Electrodes | ||||||
Item | Unit | Nominal  Diameter(mm) | ||||
YB/T4089 | Actual Indicator | |||||
300-400 | 450-500 | 550-600 | 700 | |||
Resistence is no more than | Electrode | μΩ.m | 6.2 | 6.3 | 6.0 | 5.8 |
Nipple | 5.3 | 5.3 | 4.5 | 4.3 | ||
Bending strength is no less than | Electrode | Mpa | 10.5 | 10.5 | 10.0 | 10.0 |
Nipple | 20.0 | 20.0 | 22.0 | 23.0 | ||
Elastic Modulus is no more than | Electrode | Gpa | 14.0 | 14.0 | 14.0 | 14.0 |
Nipple | 20.0 | 20.0 | 22.0 | 22.0 | ||
Bulk density is no less than | Electrode | g/cm3 | 1.67 | 1.66 | 1.66 | 1.68 |
Nipple | 1.74 | 1.75 | 1.78 | 1.78 | ||
CTE＞(100-600°C) | Electrode | 10-6/  °C | 1.5 | 1.5 | 1.5 | 1.5 |
| Nipple | 1.4 | 1.4 | 1.3 | 1.3 | |
Ash content is no more than | % | 0.5 | 0.5 | 0.3 | 0.3 | |
Note: The ash content and thermal expansivity are reference indexes. | ||||||
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