Items

Regular power grade Graphite Electrode

HP Grade

UHP Grade

Dia(mm)

75-130

150-200

250-300

400-500

200-600

300-600

Unit

Specific
Resistance
Not over

Electrode

Nipple

μΩ·m

8.5

 8.5

9.0

 8.5

9.0

8.5

9.0

8.5

7

6.5

6.5

5.5

Flexural strength

Not blow

Electrode

Nipple

MP_a

9.8

12.7

9.8

12.7

7.8

12.7

6.4

12.7

9.8

14.0

10.0

15.0

Elastic Modulus

Not over

Electrode

Nipple

GP_a

9.3

13.7

9.3

13.7

9.3

13.7

9.3

13.7

12.0

14.0

14.0

15.0

Ash content
Not over

Electrode
Nipple

%

0.5

0.5

0.5

0.5

0.3

0.3

Bulk density
Not below

Electrode
Nipple

G/cm³

1.58
1.63

1.52
1.63

1.52
1.68

1.52
1.68

1.60
1.70

1.65
1.70

(C.T.E)
Not over

Electrode
Nipple

10^-6
1/℃

2.9
3.0

2.9
3.2

2.9
3.2

2.9
3.2

2.20
2.40

1.4
1.6