Graphite electrodes’ parameters
BAMAX – OUR ELECTRODES’ PARAMETERS
Our graphite electrodes are European made and every step of the way strict quality standards are observed to ensure end users’ satisfaction. Our graphite electrodes are the number one choice where quality is relevant, which is due to the raw materials and equipment used.
Typical properties of HP Graphite Electrodes
| Properties | Unit | Typical Values | ||
| Diameter | mm | 75-150 | 200-350 | 400-600 |
| inch | 3-6 | 8-14 | 16-24 | |
| Bulk Density | g/cm3 | 1,68 | 1,68 | 1,68 |
| Specific Electrical Resistance | µОhm•m | 6,8 | 6,8 | 6,8 |
| Flexural Strength | MPa | 11 | 11 | 9 |
| Young’s Modulus | GPa | 9 | 8 | 8 |
| Linear thermal expansion coefficient, (20-520) ºС | 10-6 •1/°С | 2,4 | 2,4 | 2,4 |
Typical properties of SHP Graphite Electrodes
| Properties | Unit | Typical Values | |
| Diameter | mm | 200-300 | 400-500 |
| inch | 8-14 | 16-20 | |
| Bulk Density | g/cm3 | 1,70 | 1,70 |
| Specific Electrical Resistance | µОhm•m | 6,0 | 6,0 |
| Flexural Strength | MPa | 16 | 14 |
| Young’s Modulus | GPa | 10 | 10 |
| Linear thermal expansion coefficient, (20-520) ºС | 10-6 •1/°С | 2,4 | 2,4 |
Typical properties of UHP Graphite Electrodes
| Properties | Unit | Typical Values | |
| Diameter | mm | 350-450 | 500-650 |
| inch | 14-18 | 20-26 | |
| Bulk Density | g/cm3 | 1,72 | 1,70 |
| Specific Electrical Resistance | µОhm•m | 5,5 | 5,1 |
| Flexural Strength | MPa | 15 | 12 |
| Young’s Modulus | GPa | 11 | 12 |
| Linear thermal expansion coefficient, (20-520) ºС | 10-6 •1/°С | 2,1 | 1,3 |
Nipples for Graphite Electrodes
| Properties | Unit | Typical Values | ||
| Diameter | mm | 75-150 | 200-350 | 400-600 |
| inch | 3-6 | 8-14 | 16-26 | |
| Bulk Density | g/cm3 | 1,68 | 1,77 | 1,80 |
| Specific Electrical Resistance | µОhm•m | 5,5 | 4,5 | 4,0 |
| Flexural Strength | MPa | 16 | 17 | 22 |
| Young’s Modulus | GPa | - | 17 | 17 |
| Linear thermal expansion coefficient, (20-520) ºС | 10-6 •1/°С | 2,2 | 1,1 | 1,2 |
Sizes of Graphite Electrodes
| Nominal Diameter, mm | Diameter Range, mm | Nominal Length, mm | |
| Min | Max | ||
| 75 | 73 | 78 | 1000/1200/1500 |
| 100 | 98 | 103 | 1000/1200/1500 |
| 125 | 127 | 132 | 1000/1200/1500 |
| 150 | 149 | 154 | 1000/1200/1500 |
| 200 | 200 | 205 | 1500/1800 |
| 225 | 225 | 230 | 1500/1800 |
| 250 | 251 | 256 | 1500/1800 |
| 300 | 302 | 307 | 1500/1800/2100 |
| 350 | 352 | 357 | 1500/1800/2100 |
| 400 | 403 | 409 | 1500/1800/2100/2400 |
| 450 | 454 | 460 | 1500/1800/2100/2400 |
| 500 | 505 | 511 | 1500/1800/2100/2400/2700 |
| 550 | 556 | 562 | 1500/1800/2100/2400/2700 |
| 600 | 607 | 613 | 1500/1800/2100/2400/2700 |
| 650 | 659 | 663 | 1500/1800/2100/2400/2700 |
Sizes of graphite nipples and electrode sockets with Т4 taper thread
| Nipple | Electrode socket | ||||||
| nominal electrode diameter | Joint designation | External diameter d1 | Effective diameter d2 | Length L1 | Effective diameter d4 | Depth L2 | Thread depth L3 |
| 200 | 122Т4N | 122.24 | 119.08 | 177.80 | 119.08 | 94.90 | 90.90 | 225 | 139Т4N | 139.70 | 136.54 | 177.80 | 136.54 | 94.90 | 90.90 | 250 | 152Т4N | 152.40 | 149.24 | 190.50 | 149.24 | 101.30 | 97.30 | 300 | 177Т4N | 177.80 | 174.64 | 215.90 | 174.64 | 114.00 | 110.00 | 350 | 203Т4N | 203.20 | 200.04 | 254.00 | 200.04 | 133.00 | 129.00 | 350 | 203Т4L | 203.20 | 200.04 | 304.80 | 200.04 | 158.40 | 154.40 | 400 | 222Т4N | 222.25 | 219.09 | 304.80 | 219.09 | 158.40 | 154.40 | 400 | 222Т4L | 222.25 | 219.09 | 355.60 | 219.09 | 183.80 | 179.80 | 450 | 241Т4N | 241.30 | 238.14 | 304.80 | 238.14 | 158.40 | 154.40 | 450 | 241Т4L | 241.30 | 238.14 | 355.60 | 238.14 | 183.80 | 179.80 | 500 | 269Т4N | 269.88 | 266.72 | 355.60 | 266.72 | 183.80 | 179.80 | 500 | 269Т4L | 269.88 | 266.72 | 457.20 | 266.72 | 234.60 | 230.60 | 550 | 298Т4N | 298.45 | 295.29 | 355.60 | 295.29 | 183.80 | 179.80 | 550 | 298Т4L | 298.45 | 295.29 | 457.20 | 295.29 | 234.60 | 230.60 | 600 | 317Т4N | 317.50 | 314.34 | 355.60 | 314.34 | 183.80 | 179.80 | 600 | 317Т4L | 317.50 | 314.34 | 457.20 | 314.34 | 234.60 | 230.60 | 650 | 355Т4N | 355.60 | 352.44 | 457.20 | 352.44 | 234.60 | 230.60 | 650 | 355Т4L | 355.60 | 352.44 | 558.80 | 352.44 | 285.40 | 281.40 | 700 | 317Т4L | 317.50 | 314.34 | 457.20 | 314.34 | 234.60 | 230.60 | 700 | 374Т4N | 374.65 | 371.49 | 457.20 | 371.49 | 234.60 | 230.60 | 700 | 374Т4L | 374.65 | 371.49 | 558.80 | 371.49 | 285.40 | 281.40 |
Recommended tightening torque when joining electrodes
| Nominal electrode diameter, mm | Tightening torque, N∙m |
| 75 | 30 | 100 | 50 | 125 | 90 | 150 | 130 | 175 | 200 | 200 | 250 | 225 | 350 | 250 | 450 | 300 | 650 | 350 | 850 | 400 | 1100 | 450 | 1500 | 500 | 2500 | 550 | 3500 | 600 | 4000 | 650 | 5000 | 700 | 6000 |
Recommended current loads of graphite electrodes
| Allowable current density, A/cm2 | |||
| Nominal diameter, mm | EG | EGP | EGSP |
| 150 | 18-25 | - | - | 200 | 18-25 | 20-30 | 25-35 | 250 | 15-20 | 20-25 | 25-35 | 300 | 15-20 | 20-25 | 25-35 | 350 | 15-20 | 20-25 | 25-35 | 400 | 15-18 | 18-22 | 25-30 | 450 | 15-18 | 18-22 | 25-30 | 500 | 15-18 | 18-22 | 22-28 | 550 | 15-18 | 18-22 | 22-28 | 600 | 10-15 | 15-20 | 22-28 | 650 | - | - | 20-26 | 700 | 12 | - | 19-25 |