Item

Unit

RP Nominal Diameter(mm)

RP Nominal Diameter(mm)

 YB/T4090 Industry Standard

 Enterprise Standard

75-300

350-450

500-800

75-300

350-450

500-800

LSR≤

Electrode

μΩ.M

10.0

10.5

10.5

8

8

8

Nipple

8.0

8.0

8.0

5.5

5.5

5.5

Flexural Strength ≥

Electrode

Mpa

8.0

7.0

6.5

8.4

7.5

7

Nipple

15.0

15.0

15.0

16

16

16

Elastic Modulus ≤

Electrode

Gpa

9.3

9.3

9.3

8

8

8

Nipple

14.0

14.0

14.0

12

12

12

Bulk Density ≥

Electrode

g/cm³

1.53

1.53

1.5

1.6

1.6

1.6

Nipple

1.70

1.70

1.7

1.75

1.75

1.75

CTE ≤

Electrode

10-6/ ℃

2.9

2.9

2.9

2.8

2.8

2.8

Nipple

2.8

2.8

2.8

2.7

2.7

2.7

Ash ≤

%

0.5

0.5

0.5

0.2

0.2

0.2