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Technical Data

2015-04-21


1,Electrical resistance(Unit:μΩ.m):
Grade Electrical Resistance UHP SHP HP HD RP
Pole Max（≤） 5.5 5.6 6.5 6.8 8.5
Min（≈） 5.2 5.3 6.2 6.5 8.2
Nipple Max（≤） 3.8 4.0 4.8 4.8 5.8
Min（≈） 3.5 3.6 4.5 4.5 5.5
Measuring  Method：Field strength measuring principle；
The electrode tip（AWG graphitization）should be 100% inspected, the upper limit of resistivity is 9.0μΩ.m;
The resistivity difference between the electrode and nipple is more than or equal to 1.0μΩ.m, the best is 20%.

2,Bulk density(Unit g/cm3):
Variety Density UHP SHP HP HD RP
Lowest Highest Lowest Highest Lowest Highest Lowest Highest Lowest Highest
Electrode body 1.68 1.73 1.66 1.73 1.65 1.73 1.65 1.73 1.58 1.65
Mean 1.7 1.69 1.68 1.68 1.6

The volume density of the nipple in the minimum control range is more than or equal to 1.70 g/cm3 (when volume density of the electrode pole less than or equal to 1.59).
Electrode pole and nipple’s volume density matching differential control range:
volume density range of the electrode body(g/cm3) volume density difference between the electrode body and nipple (g/cm3)
≤1.62 ≥0.10
1.62～1.65 ≥0.09
1.65 ～1.68 ≥0.08
1.65～1.70 ≥0.07
1.70～1.74 ≥0.06
≥1.70 ≥0.05
≥0.08 g/cm3。 In the specification of the electrode diameter more than or equal to 550mm, Volume density difference should be controlled more than or equal to 0.08 g/cm3

3,Flexural Strength
Variety Strength UHP SHP HP HD RP
the minimum of the electrode pole 13.0 12.0 11.0 11.0 9.0
the minimum of the nipple 24.0 23.0 22.0 22.0 18.0

4,Thermal Expansion(the unit 100 to 600 ° C,10-6 / ° C) :
Variety Thermal Expansion UHP SHP HP HD RP
the minimum of the electrode pole 1.2 1.5 1.8 2.2 2.5
the minimum of the nipple 1.1 1.3 1.5 1.5 2.2

5,Ash(Unit%):
Variety Ash UHP SHP HP HD RP
≯Electrode body and the nipple are ≯ 0.3 0.3 0.3 0.3 0.3


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