RP Graphite Electrode – Good Electrical Conductivity, Low Consumption 150mm, 250mm, 350mm, 300mm

• Customization: Available
• Current Capacity: 18-25A/Cm2
• Cte: 2.9
• Model NO.: RP 350mm
• Resistance: 8.5-10
• Type: Graphite Electrodes
• Carbon Content: High-Carbon
• Grade: Industrial Grade
• Forming Way: Extruded Graphite
• Crystal Morphology: Compact Crystalline Graphite
• Composition: Coker
• Transport Package: Wooden Fence or Wooden Case
• Specification: RP 150-350mm
• Trademark: XINGSHI GRAPHITE
• Origin: China
• HS Code: 8545110000
• Production Capacity: 5000 Tons/Month

Product Description

EG, EGP , EGSP Graphite Electrodes carbon electrodes RP HP UHP Electrode for Steelmaking

RP Graphite Electrodes for Electric Arc Furnace Steel Production

Graphite electrodes is made of high-quality calcined petroleum coke, imported needle coke, and modified coal asphalt,the grade are RP, HD(impregnation),HP, SHP and UHP graphite electrodes,the Diameter is from 75-700mm.Graphite electrode produced by our company has the advantages of low resistivity,high electrical conductivity and thermal conductivity,good oxidation resistance,good thermal shock resistance,high mechanical strength,easy to machine,etc.Graphite electrode is widely used to smelt the steel,alloy steel and other metal or nonmetal material in electric arc furnace.


 

Product Parameters

Graphite electrodes of EG/RP grade are used in electric arc, refining, ferroalloy and submerged-arc furnaces

Properties	Units of measurement	Typical values
Diameter	mm	75-150	200-350	400-600	700
Bulk density	g/cm^3	1.61	1.61	1.61	1.58
Ash impurities	%	0,2	0,2	0,3	0,3
Specific electrical resistance	µОhm•m	8.0	8.0	8.0	8.5
Linear thermal expansion coefficient, (20-520) ºС	10^-6 •1/°С	2.4	2.4	2.4	2.5
Flexural strength	MPa	11	11	9	8
Modulus of elasticity (Young's modulus)	GPa	9	7	7	7

Graphite electrodes of EGP/ HP grade are used in high power electric arc furnaces and ladle furnaces 

Properties	Units of measurement	Typical values
Diameter	mm	200-350	400-500
Bulk density	g/cm^3	1.70	1.70
Ash impurities	%	0.2	0.2
Specific electrical resistance	µОhm•m	6.5	6.5
Linear thermal expansion coefficient, (20-520) ºС	10^-6 •1/°С	2.4	2.4
Flexural strength	MPa	16	14
Modulus of elasticity (Young's modulus)	GPa	9	9

 
Graphite electrodes of EGSP/ UHP grade are used in ultra high power electric arc furnaces and ladle furnaces 

Properties	Units of measurement	Typical values
Diameter	mm	350-450	500-650
Bulk density	g/cm^3	1.72	1.70
Ash impurities	%	0.2	0.2
Specific electrical resistance	µОhm•m	6.0	5.1
Linear thermal expansion coefficient, (20-520) ºС	10^-6 •1/°С	2.1	1.3
Flexural strength	MPa	15	12
Modulus of elasticity (Young's modulus)	GPa	10	11

Nipples for graphite electrodes

Properties	Units of measurement	Typical values
Diameter	mm	75-150	200-350	400-550	600-700
Bulk density	g/cm^3	1.68	1.77	1.80	1.82
Ash impurities	%	0.2	0.2	0.2	0.2
Specific electrical resistance	µОhm•m	5.5	4.5	4.2	4.0
Linear thermal expansion coefficient, (20-520) ºС	10^-6 •1/°С	2.2	1.1	1.2	1.1
Flexural strength	MPa	16	17	22	23
Modulus of elasticity (Young's modulus)	GPa	-	17	17	18

 Note: the above values are average values and they do not constitute a specification
 
Sizes of graphite electrodes 

Nominal diameter, mm	Typical diameter		Allowable diameter, mm		Nominal length, mm
	mm	maximum	maximum	minimum
75	76	3	78	73	1000/1200/1500
100	102	4	103	98	1000/1200/1500
125	130	5	132	127	1000/1200/1500
150	152	6	154	149	1200/1500/1800
175	178	7	179	174	1200/1500/1800
200	203	8	205	200	1500/1800
225	229	9	230	225	1500/1800
250	254	10	256	251	1500/1800
300	305	11	307	302	1500/1800/2100
350	356	12	357	352	1500/1800/2100
400	406	16	409	403	1500/1800/2100/2400
450	457	18	460	454	1500/1800/2100/2400
500	508	20	511	505	1500/1800/2100/2400
500	508	20	511	505	1500/1800/2100/2400/2700
550	559	22	562	556	1500/1800/2100/2400/2700
600	610	24	613	607	1500/1800/2100/2400/2700
650	662	26	663	659	1500/1800/2100/2400/2700
700	711	28	714	708	1500/1800/2100/2400/2700

Allowable lengths of graphite electrodes 

Nominal length, mm	Allowable normal electrode length, mm		Allowable short electrode length, mm
	maximum	minimum	maximum	minimum
1000	1050	925	925	800
1200	1250	1100	1100	975
1500	1600	1400	1400	1225
1800	1900	1700	1700	1525
2100	2225	1975	1975	1825
2400	2525	2275	2275	2125
2700	2900	2550	2550	2400

 
 
 
 Sizes of graphite nipples and electrode sockets with 4TP
 
 

Nominal electrode diameter	Joint designation	Nipple			Electrode socket
		External diameter	Effective diameter	Length	Effective diameter	Depth	Thread depth
		d1	d2	L1	d4	L2	L3
200	122Т4N	122.24	119.08	177.80	119.08	94.90	90.90
225	139Т4N	139.70	136.54	177.80	136.54	94.90	90.90
250	152Т4N	152.40	149.24	190.50	149.24	101.30	97.30
300	177Т4N	177.80	174.64	215.90	174.64	114.00	110.00
350	203Т4N	203.20	200.04	254.00	200.04	133.00	129.00
350	203Т4L	203.20	200.04	304.80	200.04	158.40	154.40
400	222Т4N	222.25	219.09	304.80	219.09	158.40	154.40
400	222Т4L	222.25	219.09	355.60	219.09	183.80	179.80
450	241Т4N	241.30	238.14	304.80	238.14	158.40	154.40
450	241Т4L	241.30	238.14	355.60	238.14	183.80	179.80
500	269Т4N	269.88	266.72	355.60	266.72	183.80	179.80
500	269Т4L	269.88	266.72	457.20	266.72	234.60	230.60
550	298Т4N	298.45	295.29	355.60	295.29	183.80	179.80
550	298Т4L	298.45	295.29	457.20	295.29	234.60	230.60
600	317Т4N	317.50	314.34	355.60	314.34	183.80	179.80
600	317Т4L	317.50	314.34	457.20	314.34	234.60	230.60
650	355Т4N	355.60	352.44	457.20	352.44	234.60	230.60
650	355Т4L	355.60	352.44	558.80	352.44	285.40	281.40
700	317Т4L	317.50	314.34	457.20	314.34	234.60	230.60
700	374Т4N	374.65	371.49	457.20	371.49	234.60	230.60
700	374Т4L	374.65	371.49	558.80	371.49	285.40	281.40

 
Note: Nipple effective diameter d2 is equal to electrode socket effective diameter d4
 
Other combinations of the nominal diameter and the joint are to be agreed upon with a customer!
 
Sizes of graphite nipples and electrode sockets with  Т3 taper thread
 

Nominal electrode diameter	Joint designation	Nipple			Electrode socket
		External diameter	Effective diameter	Length	Effective diameter	Depth	Thread depth
		d1	d2	L1	d4	L2	L3
225	139Т3N	139.70	135.49	203.20	135.49	107.60	103.60
250	155Т3N	155.57	151.36	220.00	151.36	116.00	112.00
300	177Т3N	177.16	172.95	270.90	172.95	141.50	137.50
350/400	215Т3N	215.90	211.69	304.80	211.69	158.40	154.40
350/400	215Т3L	215.90	211.69	355.60	211.69	183.80	179.80
400/450	241Т3N	241.30	237.09	338.70	237.09	175.30	171.30
400/450	241Т3L	241.30	237.09	355.60	237.09	183.80	179.80
500	273Т3N	273.05	268.84	355.60	268.84	183.80	179.80
500	273Т3L	273.05	268.84	457.20	268.84	234.60	230.60
550	298Т3L	298.45	294.24	457.20	294.23	234.60	230.60

 

 
Sizes of graphite nipples and electrode sockets with cylindrical thread 3
 
 
 

Nominal electrode diameter	Joint designation	Nipple		Electrode socket
		Diameter d	Length L	External diameter d1	Socket depth L1
75	41С3N	41.2	103.0	35.1	53.0
100	66C3N	66.7	135.0	60.6	69.0
125	69C3N	69.8	153.0	63.7	78.0
150	88C3N	88.9	169.0	82.8	86.0
200	122C3N	122.2	203.0	116.1	103.0

 
Note: Nipples from 75 mm to 200 mm in diameter  are made without holes for plugs.
 
 
Recommended tightening torque when joining electrodes
 

Nominal electrode diameter, mm	Tightening torque, Nm
75	30
100	50
125	90
150	130
175	200
200	250
225	350
250	450
300	650
350	850
400	1100
450	1500
500	2500
550	3500
600	4000
650	5000
700	6000

 
Recommended current loads of graphite electrodes.

Nominal diameter, mm	Allowable current density, A/cm^2
	EG	EGP	EGSP
150	18-25	-	-
200	18-25	20-30	25-35
250	15-20	20-25	25-35
300	15-20	20-25	25-35
350	15-20	20-25	25-35
400	15-18	18-22	25-30
450	15-18	18-22	25-30
500	15-18	18-22	22-28
550	15-18	18-22	22-28
600	10-15	15-20	22-28
650	-	-	20-26
700	12	-	19-25

 

Features

 

* Full range of carbon materials, graphite materials, refactories and water treatment materials products and solutions;

* High output, with an annual output of 100,000 tons, timely delivery;
* Low resistivity
* High temperature strength
* Good thermal conductivity and electrical conductivity
* Low thermal expansion coefficient
* Low ash,Its ash content is controlled within 3%.
* Dense and equal structure,Low graphite electrode consumption.
* Good oxidation resistance
* High mechanical strength

Detailed Photos

 

Graphite electrodes in stock and on order!

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