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• Regular Power Graphite Electrode

• Technical Specification of RP Graphite Electrode
• Tolerance Specification
• Allowed Current Carring Load of RP Graphite Electrode
• Average Weight of Each Electrode

• High Power Graphite Electrode

• Technical Specification for HP Electrode
• Current-carrying Capacity of HP Graphite Electrode

• Ultra High Power Graphite Eletrode

• Technical Specification for UHP Electrode
• Allowed Current-Carrying Capacity of UHP Graphite Electrode

• Dimesion of Nipple

• Dimension of Tapered Nipple
• Dimension of Cylindical Nipple

• Regular Power Graphite Electrode (RP Graphite Electrode)

• Technical Specification of RP Graphite Electrode

Specification & Technical Parameter		Unit	Nominal Diameter (mm)
			75-130		150-200		250-300		400-500
			Top Class	First Class	Top Class	First Class	Top Class	First Class	Top Class	First Class
Resistivity (Max.)	Electrode	μΩm	8.5	10.0	9.0	11.0	9.0	11.0	9.0	11.0
	Nipple		8.5		8.5		8.5		8.5
Flexible Strength (Min.)	Electrode	MPa	9.8		9.8		7.8		6.4
	Nipple		12.7		12.7		12.7		12.7
Modulus Elasticity (Max.)	Electrode	GPa	9.3		9.3		9.3		9.3
	Nipple		13.7		13.7		13.7		13.7
Bulk Density (Min.)	Electrode	g/cm3	1.58		1.58		1.58		1.58
	Nipple		1.70		1.70		1.70		1.70
Ash Content (Max.)		%	0.3		0.3		0.3		0.3
CTE (Max.) 100-600 ℃	Electrode	10-6l/℃	2.9		2.9		2.9		2.9
	Nipple		3.0		3.0		3.2		3.2

• Tolerance Specification

Diameter (mm)				Length (mm)
Nominal Diameter	Maxium	Minimum	Min of Blacking	Standard	Length	Short Dimension Length
75	77	74	72	1000	+50-75	-225
100	102	99	97	1200
130	131	128	126	1200
150	154	151	148	1600	+,-100	-275
200	204	201	198	1600
250	256	252	249	1600
300	307	303	300	1800
350	357	353	350	1800
400	408	404	401	1800	+,-100	-275
450	459	455	452	1800
500	510	506	503	2000

 

• Allowed Current Carrying Load of RP Graphite Electrode

Nominal Diameter (mm)	Current Carrying Load (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

　

• Average Weight of Each Electrode

Nominal Diameter	75 mm	100 mm	150 mm	200 mm	250 mm	300 mm	350 mm	400 mm
Electrode	9 Kg	17 Kg	47 Kg	77 Kg	133 Kg	189 Kg	239 Kg	341 Kg
Tapered Nipple	0.18 Kg	0.40 Kg	1.0 Kg	2.36 Kg	5.11 Kg	8.08 Kg	14.00 Kg	18.8 Kg

　

• High Power Graphite Electrode (HP Graphite Electrode)

• Technical Specification for HP Electrode

Specification & Technical Parameter		Unit	Nominal Diameter (mm)
			300, 350	400, 450, 500
Resistivity (Max.)	Electrode	μΩm	6.5	5.5
	Nipple		5.5	5.5
Strength (Min.)	Electrode	MPa	9.8	9.8
	Nipple		14.0	14.0
Elastic Modulus (Min.)	Electrode	GPa	12.0	12.0
	Nipple		14.0	14.0
Bulk Density (Min.)	Electrode	g/cm3	1.62	1.62
	Nipple		1.73	1.73
Ash (Max.)		%	0.2	0.2
C. T. E (Max.)	Electrode	10-6l/℃	2.0	2.0
	Nipple		2.2	2.2

　

• Current-carrying Capacity of HP Graphite Electrode

Nominal Diameter (mm)	Capacity (A)	Current Density (A/cm2 )
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

 

• Ultra High Power Graphite Eletrode (UHP Graphite Electrode)

• Technical Specification for UHP Electrode

Specification & Technical Parameter		Unit	Nominal Diameter (mm)
			350-500
Resistivity (Max.)	Electrode	μΩm	6.0
	Nipple		5.0
Strength (Max.)	Electrode	MPa	10.0
	Nipple		15.0
Elastic Modulus (Min.)	Electrode	GPa	14.0
	Nipple		15.0
Bulk Density (Min.)	Electrode	g/cm3	1.65
	Nipple		1.75
Ash (Max.)		%	0.2
C T E (Max.)	Electrode	10-6l/℃	1.4
	Nipple		1.6

• Allowed Current-Carrying Capacity of UHP Graphite Electrode

Nominal Diameter (mm)	Capacities (A)	Current Density (A/cm2)
400	25000 ~ 40000	19 ~ 30
450	32000 ~ 45000	19 ~ 27
500	38000 ~ 55000	18 ~ 27

 

• Dimension of Nipple

• Dimension of Tapered Nipple

Electrode Diameter (mm)	Nipple (mm)							Socket (mm)				Pitch (mm)
	D		L		d2		l	d1		H
250	155.58	0-0.50	220.10	0-1	103.80	0-3	10	147.14	+0.5-0	113.05	+7-0	8.47
300	177.17		270.90		116.90			168.73		138.45
350	215.90		304.80		150.00			207.47		155.40
400	241.30		338.60		169.80			232.87		172.30
450	273.05		355.60		198.70			264.62		180.80
500	298.45		372.50		221.30			290.02		189.25
75	46.04	0-0.50	76.20	0-1	20.80	0-3	6	39.72	+0.50-0	41.10	+7-0	6.35
100	69.85		101.60		40.30			63.53		53.80
130	79.38		127.00		45.60			73.06		66.50
150	92.08		139.70		56.20			85.76		72.85
200	122.24		177.80		80.00			115.92		91.90
250	152.40		190.50		108.00			146.08		101.30
300	177.80		215.90		129.20			171.48		114.00
350	203.20		254.00		148.20			196.88		133.00
400	222.25		304.80		158.80			215.93		158.40
450	241.30		304.80		177.90			234.98		158.40
500	269.88		355.60		198.00			263.56		183.80

 

• Dimension of Cylindical Nipple

Electrode Diameter	Nipple (mm)									Socket (mm)						Pitch (mm)
	D		d		L		d2		L	D1		d1		H		a	b	c
75 mm	41.20	0-0.50	33.80	0-0.5	103.00	0-1	32.00	0-2	6	42.50	+0.50-0	35.10	+0.50-0	53.00	+10+4	8.47	2.37	2.82
100 mm	66.70		59.30		135.00		56.00			68.00		60.60		69.00
130 mm	69.80		62.40		153.00		59.00			71.10		63.70		78.00
150 mm	88.90		81.50		169.00		78.00			90.20		82.80		86.00
200 mm	122.20		114.80		203.00		112.00			123.50		116.10		103.00
250 mm	152.40		141.50		228.00		139.00	0-3	10	154.10		143.20		116.00		12.7	3.67	4.23
300 mm	184.20		173.30		254.00		170.00			185.90		175.00		129.00
350 mm	215.90		205.00		280.00		202.00			217.60		206.70		142.00
400 mm	244.50		233.60		305.00		230.00			246.20		235.30		155.00
450 mm	274.30	0-0.70	263.40	0-0.7	340.00	0-2	260.00			276.00	+0.70-0	265.10	+0.70-0	172.50
500 mm	296.00		285.10		375.00		280.00			297.70		286.80		190.00