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Flow Control Refractories and Supplies
     
     
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Fedmet Resources has been importing electrodes into North America for the past 10 years. The experience gained from this has given us valuable insight into what the imported electrode market has to offer.

 

Working only with ISO9000 certified plants that have quality control programs in place, Fedmet electrodes undergo rigorous testing and quality control procedures to assure that they are in compliance with the IEC239 and NEMA standards. We follow these same standards for all our machining, including nipples and sockets. These steps assure a consistent quality electrode for our customers.

 

Fedmet found a way to improve our electrodes by being the first company to export USA petroleum based needle coke, the preferred feedstock for the production of electrodes, to our qualified electrode manufacturers for use in the production of electrodes “exclusively”for Fedmet. Consequently, Fedmet stands alone as the only company that offers imported electrodes manufactured from USA top grade petroleum needle coke.

 

In addition to this product offering, Fedmet also supplies unitrode configurations, as well as various other configurations for all industries requiring graphite products. We also have the capability to machine and remachine graphite pieces, as well as offer ancillary equipment and products to our customers.

 

Fedmet’s goal is to consistently supply its customers with high quality electrodes and ancillary graphite products.
Technical Properties of Graphite Electrodes
ITEM UNIT PRODUCT NOMINAL DIAMETER (mm)
“RP” “HD” “HP” “SHP” “UHP”
Regular
Power		 High
Density		 High
Power		 Super
High Power		 Ultra
High Power
250-350 400-500 250-350 400-500 300-350 400-500 350-500 350-500
Resistivity µΩm Electrode 5.5-7.8 5.5-7.8 5.5-7.0 5.5-7.0 5.5-6.5 5.5-6.5 5.0-6.0 5.0-6.0
Nipple 4.2-5.5 4.2-5.5 4.2-5.5 4.2-5.5 4.2-5.5 4.2-5.5 4.2-5.5 4.2-5.5
Flexural
Strength		 (Mpa) Electrode 10-15 10-15 10-15 10-15 10-15 10-15 10-15 10-15
Nipple 10-15 10-15 10-15 10-15 10-15 10-15 10-15 10-15
Elastic
Mondulus		 (Gpa) Electrode 7-14 7-14 7-14 7-14 7-14 7-14 7-14 7-14
Nipple 7-14 7-14 7-14 7-14 7-14 7-14 7-14 7-14
Ash
Content		 % Electrode ≤ 0.2 ≤ 0.2 ≤ 0.2 ≤ 0.2 ≤ 0.2 ≤ 0.2 ≤ 0.2 ≤ 0.2
Nipple
Bulk
Density		 g/cm3 Electrode 1.65-1.73 1.65-1.73 1.65-1.73 1.65-1.73 1.65-1.73 1.65-1.73 1.68-1.75 1.68-1.75
Nipple 1.72-1.79 1.72-1.79 1.72-1.79 1.72-1.79 1.72-1.79 1.72-1.79 1.72-1.79 1.72-1.79
C.T.E. 10-6/°C Electrode 1.0-1.5 1.0-1.5 1.0-1.5 1.0-1.5 1.0-1.5 1.0-1.5 1.0-1.5 1.0-1.5
Nipple 1.0-1.5 1.0-1.5 1.0-1.5 1.0-1.5 1.0-1.5 1.0-1.5 1.0-1.5 1.0-1.5

 

Call us with your questions and inquiries – we look forward to helping you.
 
 
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Nominal Diameter Tolerances Nominal
Diameter Length
Inches mm Exact Conv. Maximum Minimum Low Spot * Inches mm Exact Conv.
to mm Inches mm Inches mm Inches mm to mm
4 100 101.6 4.07 103.4 3.88 98.6 3.84 97.5 40 1000 1016.0
48 1200 1219.2
5.1/8 130 130.2 5.20 132.1 5.00 127.0 4.96 126.0 40 1000 1016.0
6 150 152.0 6.07 154.2 5.88 149.4 5.75 146.1 48 1200 1219.2
60 1500 1524.0
72 1800 1828.8
7 175 177.8 7.07 179.6 6.88 174.8 6.75 171.5 48 1200 1219.2
60 1500 1524.0
72 1800 1828.8
8 200 203.2 8.07 205.0 7.88 200.2 7.75 196.9 48 1200 1219.2
60 1500 1524.0
72 1800 1828.8
9 225 228.6 9.07 230.4 8.88 225.6 8.75 222.3 60 1500 1524.0
72 1800 1828.8
10 250 254.0 10.07 255.8 9.88 251.0 9.75 247.7 48 1200 1219.2
60 1500 1524.0
72 1800 1828.8
12 300 304.8 12.07 306.6 11.88 301.8 11.75 298.5 60 1500 1524.0
72 1800 1828.8
14 350 355.6 14.07 357.4 13.88 352.6 13.75 349.3 60 1500 1524.0
72 1800 1828.8
16 400 406.4 16.07 408.2 15.88 403.4 15.75 400.1 72 1800 1828.8
17 425 431.8 17.12 434.9 16.88 428.8 16.75 425.5 60 1500 1524.0
72 1800 1828.8
18 450 457.2 18.12 460.3 17.88 454.2 17.75 450.9 60 1500 1524.0
72 1800 1828.8
96 2400 2438.4
20 500 508.0 20.12 511.1 19.88 505.0 19.75 501.7 72 1800 1828.8
84 2100 2133.6
96 2400 2438.4
22 550 555.8 22.12 561.9 21.88 555.8 21.75 552.5 72 1800 1828.8
84 2100 2133.6
24 600 609.6 24.12 612.7 23.88 606.6 23.75 603.3 72 1800 1828.8
84 2100 2133.6
96 2400 2438.4
                     
* Low Spot is a flat spot in a localized area untouched by the tool when the electrode is turned as compared with the remainder of the surface.
                     
As per IEC and NEMA standards                
                     

 
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LENGTH TOLERANCES OF MACHINED AND GRAPHITE ELECTRODES
Nominal Length tolerances on normal electrodes Length tolerances on short length electrodes
length
Inches mm Maximum Minimum Maximum Minimum
Inches mm Inches mm Inches mm Inches mm
40 1000 +  2 +   50 -  3 -   75 -  3 -   75 -  8 -  200
48 1200 +  2 +   50 -  4 -  100 -  4 -  100 -  9 -  225
60 1500 +  2 +   50 -  4 -  100 -  4 -  100 -  11 -  275
72 1800 +  3 +   75 -  4 -  100 -  4 -  100 -  11 -  275
84 2100 +  3 +   75 -  5 -  125 -  5 -  125 -  11 -  275
96 2400 +  3 +   75 -  5 -  125 -  5 -  125 -  11 -  275
                 
As per IEC and NEMA standards              
 
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Dimensions of Connecting Pins and Sockets 3TPI  
  Connecting Pins          
           
  Nominal diameter Nominal Pin size Overall Length "L"
  of electrode "d1" x "L1" Maximum Minimum
Inches 9 5.500 x 8.000 8.000 7.906
mm 225 139.700 x 203.200 203.200 200.820
Inches 10 6.125 x 8.660 8.667 8.573
mm 250 155.580 x 219.960 220.140 217.750
Inches 12 6.975 x 10.660 10.667 10.573
mm 300 177.160 x 270.760 270.940 268.550
Inches 14 8.500 x 12.000 12.000 11.906
mm 350 215.900 x 304.800 304.800 302.420
Inches 16 8.500 x 12.000 12.000 11.906
mm 400 215.900 x 304.800 304.400 302.420
Inches 17 9.500 x 14.000 14.000 13.906
mm 425 241.300 x 355.600 355.600 353.220
Inches 18 9.500 x 14.000 14.000 13.906
mm 450 241.300 x 355.600 355.600 353.220
Inches 20 10.750 x 14.000 14.000 13.906
mm 500 273.050 x 355.600 355.600 353.220
           
  Electrode Socket          
  Nominal diameter Depth of  Length of Nominal Pitch of
  socket "L3"  thread "L2" diameter thread
  of electrode Minimum Minimum "d2" "P"
Inches 9 4.187 4.000 5.500 0.333
mm 225 106.360 101.600 139.700 8.470
Inches 10 4.521 4.333 6.125 0.333
mm 250 114.830 110.060 155.580 8.470
Inches 12 5.520 5.333 6.975 0.333
mm 300 140.230 135.460 177.160 8.470
Inches 14 6.187 6.000 8.500 0.333
mm 350 157.160 152.400 215.900 8.470
Inches 16 6.187 6.000 8.500 0.333
mm 400 157.160 152.400 215.900 8.470
Inches 17 7.187 7.000 9.500 0.333
mm 425 182.560 177.800 241.300 8.470
Inches 18 7.187 7.000 9.500 0.333
mm 450 182.560 177.800 241.300 8.470
Inches 20 7.187 7.000 10.750 0.333
mm 500 182.560 177.800 273.050 8.470
           
As per NEMA standards          
IEC standards also available          

 
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  Dimensions of Connecting Pins and Sockets 4TPI  
  Connecting Pins          
           
Nominal diameter Nominal Pin size Overall Length "L"
of electrode "d1" x "L1" Maximum Minimum
Inches 4 2.750 x 4.000 4.000 3.938
mm 100 69.850 x 101.600 101.600 100.010
Inches 5.1/8 3.125 x 5.000 5.000 4.938
mm 130 79.380 x 127.000 127.000 125.410
Inches 6 3.625 x 5.500 5.500 5.406
mm 150 92.080 x 139.700 139.700 137.320
Inches 7 4.250 x 6.500 6.500 6.406
mm 175 107.950 x 165.100 165.100 162.720
Inches 8 4.812 x 7.000 7.000 6.906
mm 200 122.240 x 177.800 177.800 175.420
Inches 20 10.625 x 18.000 18.000 17.906
mm 500 269.880 x 457.200 457.200 454.820
Inches 22 11.750 x 18.000 18.000 17.906
mm 550 298.450 x 457.200 457.200 454.820
Inches 24 12.500 x 18.000 18.000 17.906
mm 600 317.500 x 457.200 457.200 454.820
           
  Electrode Socket          
Nominal diameter Depth of  Length of Nominal Pitch of
socket "L3"  thread "L2" diameter thread
of electrode Minimum Minimum "d2" "P"
Inches 4 2.187 2.000 2.750 0.250
mm 100 55.560 50.800 69.850 6.350
Inches 5.1/8 2.687 2.500 3.125 0.250
mm 130 68.260 63.500 79.380 6.350
Inches 6 2.937 2.750 3.625 0.250
mm 150 74.610 69.850 92.080 6.350
Inches 7 3.437 3.250 4.250 0.250
mm 175 87.310 82.550 107.950 6.350
Inches 8 3.687 3.500 4.812 0.250
mm 200 93.660 88.900 122.240 6.350
Inches 20 9.187 9.000 10.625 0.250
mm 500 233.360 228.600 269.880 6.350
Inches 22 9.187 9.000 11.750 0.250
mm 550 233.360 228.600 298.450 6.350
Inches 24 9.187 9.000 12.500 0.250
mm 600 233.360 228.600 317.500 6.350
           
As per NEMA standards          
IEC standards also available          

 
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Approximate weight for UHP electrodes   
with nipples installed    
     
Nominal weight
Diameter
Inches mm Pounds kg
4 x 47 100 x 1200 36.25 16.44
6 x 60 150 x 1600 104.14 47.24
8 x 60 200 x 1600 185.13 83.97
10 x 60 250 x 1600 289.27 131.21
10 x 72 250 x 1800 347.12 157.45
12 x 60 300 x 1600 416.55 188.95
12 x 72 300 x 1800 499.86 226.74
14 x 72 350 x 1800 680.36 308.61
16 x 72 400 x 1800 888.63 403.08
17 x 72 430 x 1800 1003.18 455.04
18 x 72 450 x 1800 1124.67 510.15
20 x 72 500 x 1800 1388.49 629.81