RP Graphite Electrode

Regular power （RP）graphite electrodes are made of high-quality petroleum coke, coal tar pitch and other raw materials, through calcining, crushing, screening, dosing, kneading, forming, baking, graphitization, machining, etc.

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electrodes Regular power （RP）graphite electrodes

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Product Description
Electrodes Size
Nipples Size
Specifications
Current-Carrying Capacity
Packing
Precautions for Use

- Commodity name: RP Graphite Electrode
- Commodity ID: 1053232101882421248
Regular power （RP）graphite electrodes are made of high-quality petroleum coke, coal tar pitch and other raw materials, through calcining, crushing, screening, dosing, kneading, forming, baking, graphitization, machining, etc.

Regular power （RP）graphite electrodes are made of high-quality petroleum coke, coal tar pitch and other raw materials, through calcining, crushing, screening, dosing, kneading, forming, baking, graphitization, machining, etc. Good thermal conductivity, high mechanical strength, and strong resistance to oxidation and corrosion at high temperatures. It is widely used in electric arc furnaces and ladle refining furnaces to smelt various alloy steels, yellow phosphorus, industrial silicon, brown corundum, and other alloys and non-metal materials.
Key words:
- electrodes
- Regular power （RP）graphite electrodes

Norminal Diameter (mm)			Actual Diameter (mm)			Length (mm)*
mm	inch	Max		Min	Low Spot	Length (mm)*
75	3	78		73	72	1600
100	4	103		98	97	1600
130	5	132		127	126	1600
150	6	154		149	146	1800
200	8	205		200	197	1800
225	9	230		225	222	1800
250	10	256		251	248	1800
300	12	307		302	299	1800
350	14	357		352	349	1800
400	16	409		403	400	1800.2100
450	18	460		454	451	1800.2100
500	20	511		505	502	1800.2100
550	22	562		556	553	2100.2400
600	24	613		607	604	2100.2400

Dimension of Cylinder Nipples

Norminal Diameter (mm)			Size of Nipples (mm)						Size of Sockets (mm)						Thread (mm)
mm	inch		D		d		L		D		d		H		a	b	c
75		3	41.2	0 -0.5	33.8	0 -0.5	103.0	0 -1.0	42.5	+0.50	35.1	+0.50	53.0	+7 0	8.47	2.37	2.82
100		4	66.7		59.3		135.0		68.0		60.6		69.0
130		5	69.8		62.4		153.0		71.1		63.7		78.0
150		6	88.9		81.5		169.0		90.2		82.8		85.0
200		8	122.2		114.8		203.0		123.5		116.1		103.0
225		9	139.7		128.8		203.0		140.98		130.0		106.0		12.70	3.67	4.32
250		10	152.4		141.5		228.0		154.1		143.2		116.0
300		12	184.2		173.3		254.0		185.9		175.0		129.0
350		14	215.9		205.0		280.0		217.6		206.7		142.0
400		16	244.5		233.6		305.0		246.2		235.3		155.0
450		18	274.3	0 -0.7	263.4	0 -0.7	340.0	0 -2 .0	276.0	+0.70	265.1	+0.70	172.5
500		20	296.0		285.1		375.0		297.7		286.8		190.0

Dimension of 3TPI Conical Nipples

Norminal Diameter (mm)		Size of Nipples (mm)							Size of Sockets (mm)				Thread (mm)
mm	inch	D		L		d		1	d		H		Thread (mm)
225	9	139.7	0 -0.5	203.2	0-1	90.73	0 -5	<10	131.27	+0.5 0	107.6	+7 0	8.47
250	10	155.57		220.10		103.80			147.14		116.00
300	12	177.17		270.90		116.90			168.73		141.50
350	14	215.90		304.80		150.00			207.47		158.40
400	16	215.9		304．8		150			207．47		158．40
400	16	241.30		338.70		169.80			232.87		175.30
450	18	241.30		338.70		169.80			232.87		175.30
450	18	273.05		355.60		198.70			264.62		183.80
500	20	273.05		355.60		198.70			264.62		183.80
500	20	298.45		372.60		221.30			290.02		192.20

Dimension of 4TPI Conical Nipples

Norminal Diameter (mm)		Size of Nipples (mm)							Size of Sockets (mm)				Thread (mm)
mm	inch	D		L		d		1	d		H		Thread (mm)
75	3	46.04	0 -0.5	76.20	0 -1	20.80	0 -5	<7	39.72	+0.5 0	44.10	+7 0	6.35
100	4	69.85		101.60		40.30			63.53		56.80
130	5	79.38		127.00		45.60			73.06		69.50
150	6	92.08		139.70		56.20			85.76		75.90
200	8	122.24		177.80		80.00			115.92		94.90
225	9	139.70		177.80		97.46			133.38		94.90
250	10	152.40		190.50		108.00			146.08		101.30
300	12	177.80		215.90		129.20			171.48		114.00
350	14	203.20		254.00		148.20			196.88		133.00
400	16	222.25		304.80		158.80			215.93		158.40
400	16	222.25		355.60		150.00			215.93		183.80
450	18	241.30		304.80		177.90			234.98		158.40
450	18	241.30		355.60		169.42			234.98		183.80
500	20	269.88		355.60		198.00			263.56		183.80
500	20	269.88		457.20		181.08			263.56		234.60
550	22	298.45		355.60		226.58			292.13		183.80
550	22	298.45		457.20		209.65			292.13		234.60
600	24	317.50		355.60		245.63			311.18		183.30
600	24	317.50		457.20		228.70			311.18		234.60

Item		Unit	Norminal Diameter（mm）
Item		Unit	75~130	150~225	250~300	350~500
Electric Resistivity Max	Electrode	μΩ·m	8.5	9.0	9.0	9.0
Electric Resistivity Max	Nipples	μΩ·m	6.5	6.5	6.5	6.5
Flexural Strength Min	Electrode	MPa	9.8	9.8	7.8	6.4
Flexural Strength Min	Nipples	MPa	13.0	13.0	13.0	13.0
Elastic Modulus Max	Electrode	GPa	9.3	9.3	9.3	9.3
Elastic Modulus Max	Nipples	GPa	14.0	14.0	14.0	14.0
Bulk Density Min	Electrode	g/cm³	1.58	1.52	1.52	1.52
Bulk Density Min	Nipples	g/cm³	1.68	1.68	1.68	1.68
C.T.E. Max（100℃~600℃）	Electrode	10¯⁶ /℃	2.9	2.9	2.9	2.9
C.T.E. Max（100℃~600℃）	Nipples	10¯⁶ /℃	2.7	2.7	2.8	2.8
Ash Max		%	0.5	0.5	0.5	0.5

Item		Unit	Norminal Diameter（mm）
Item		Unit	75~130	150~225	250~300	350~500
Electric Resistivity Max	Electrode	μΩ·m	8.5	9.0	9.0	9.0
Electric Resistivity Max	Nipples	μΩ·m	6.5	6.5	6.5	6.5
Flexural Strength Min	Electrode	MPa	9.8	9.8	7.8	6.4
Flexural Strength Min	Nipples	MPa	13.0	13.0	13.0	13.0
Elastic Modulus Max	Electrode	GPa	9.3	9.3	9.3	9.3
Elastic Modulus Max	Nipples	GPa	14.0	14.0	14.0	14.0
Bulk Density Min	Electrode	g/cm³	1.58	1.52	1.52	1.52
Bulk Density Min	Nipples	g/cm³	1.68	1.68	1.68	1.68
C.T.E. Max（100℃~600℃）	Electrode	10¯⁶ /℃	2.9	2.9	2.9	2.9
C.T.E. Max（100℃~600℃）	Nipples	10¯⁶ /℃	2.7	2.7	2.8	2.8
Ash Max		%	0.5	0.5	0.5	0.5

Norminal diameter（mm）	Current-Carrying Capacity（A）	Current Density（A/cm²）
75	1000~1400	22-31
100	1500~2400	19-30
130	2200~3400	17~26
150	3000~4500	16-25
200	5000~6900	15-21
250	7000~10000	14-20
300	10000~13000	14~18
350	13500~18000	14~18
400	18000~23500	14~18
450	22000~27000	13~17
500	25000~32000	13~16
550	30000~42000	13~16
600	40000~53000	13~16

The packing is made of wood and plywood with strip steel outside and plastic outside. The solid wood slat is used to protect the graphite electrodes, the nipples and sockets are protected by foam hat first then by plywood outside, the plastic inside has effect of moisture proof and dust proof, with 6-8 steel strips outside, beautiful and firm which suitable for land and sea transportation.
1. When selecting electrode diameter for steel making, please refer to electrode current capacity.

2. Graphite electrodes should be protected from rain and snow during transportation and storage. Before use, they must be dried.

3.Graphite electrodes should be handled with care during loading, unloading, and transportation to protect the threads and prevent damage.

4.Before connecting the electrode, the electrode socket thread must be blown out with compressed air, and then the nipples and the electrode should be tightened.

5.The electrode lifting device of the electrode should not shake during operation to prevent the nipples from loosening and tripping.

6.The electrode holder must not hold the electrode near the nipple socket.

7.When charging the furnace, a large steel block should be placed at the lower part to prevent the material from collapsing and breaking the electrode during melting.

RP Graphite Electrode

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