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Product Description

Yanjun Carbon is the subsidiary of Lubei Carbon which mainly produce RP/HP/UHP graphite electrodes in diameter 100mm-600mm, we have a complete calcining, crushing, forming, baking, impregnation, graphitization, machining production lines and advanced technology and complete quality test equipment for quality control.
Size of Electrodes:

Norminal Diameter (mm)			Actual Diameter (mm)			Length (mm)*
mm	inch	Max		Min	Low Spot
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
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
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

RP Specifications:

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

HP Specifications:

Item		Unit	Norminal Diameter(mm)
			200~400	450~500	550~600
Electric Resistivity Max	Electrode	μΩ·m	6.8	7.5	7.0
	Nipples		5.5	5.5	5.0
Flexural Strength Min	Electrode	MPa	10.5	9.8	10.0
	Nipples		14.0	14.0	16.0
Elastic Modulus Max	Electrode	GPa	12.0	12.0	12.0
	Nipples		16.0	16.0	18.0
Bulk Density Min	Electrode	g/cm³	1.60	1.60	1.65
	Nipples		1.70	1.70	1.75
C.T.E. Max(100ºC~600ºC)	Electrode	10¯6 /ºC	2.4	2.4	2.4
	Nipples		2.2	2.2	2.2
Ash Max		%	0.3	0.3	0.3

UHP Specifications:

Item		Unit	Norminal Diameter(mm)
			300~400	450~500	550~600
Electric Resistivity Max	Electrode	μΩ·m	6.2	6.3	5.8
	Nipples		4.5	4.5	4.0
Flexural Strength Min	Electrode	MPa	11.5	11.5	11.0
	Nipples		20.0	20.0	22.0
Elastic Modulus Max	Electrode	GPa	14.0	14.0	14.0
	Nipples		20.0	20.0	22.0
Bulk Density Min	Electrode	g/cm³	1.71	1.70	1.68
	Nipples		1.76	1.78	1.80
C.T.E. Max(100ºC~600ºC)	Electrode	10¯6 /ºC	1.5	1.5	1.5
	Nipples		1.4	1.4	1.3
Ash Max		%	0.3	0.3	0.3

Current-Carrying Capacity of RP graphite electrodes

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

Current-Carrying Capacity of HP graphite electrodes

Norminal diameter(mm)	Current-Carrying Capacity(A)	Current Density(A/cm²)
200	5500~9000	18-28
250	8000~13000	18-25
300	13000~17400	17~24
350	17400~24000	17~24
400	21000~31000	16~24
450	25000~40000	15~24
500	30000~48000	15~24
550	44000~58000	15~24
600	52000~67000	15~24

Current-Carrying Capacity of UHP graphite electrodes

Norminal diameter(mm)	Current-Carrying Capacity(A)	Current Density(A/cm²)
300	15000~22000	20~30
350	20000~30000	20~30
400	25000~40000	19~30
450	32000~45000	19~27
500	38000~55000	18~27
550	45000~70000	18~27
600	50000~97000	18~27

Precautions for use:
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.