Graphite Electrode (RP)

Description
Inquiry

Regular power graphite electrode is mainly used in EAF steelmaking. We are an industry leader in the production, sales, export and supply of graphite electrodes for a wide range of applications. Our products have excellent electrical conductivity, and perform well in harsh smelting conditions.

RP electrode standard sizes range between diameter 75 to 960mm with lengths of 1000~2200mm.

Detailed specification:

The following are the specific parameters of regular power graphite electrode products.

Physical & Chemical Index

ITEMS	TYPE	REGULAR POWER
ITEMS	TYPE	Ø75-200	Ø250-600
Resistance μΩ.m (Max)	Electrode	8.5
Resistance μΩ.m (Max)	Nipple	6.5
Density g/cm³ (Min)	Electrode	1.6	1.58
Density g/cm³ (Min)	Nipple	1.75
Flexure Strength Mpa (Min)	Electrode	10.0	8.0
Flexure Strength Mpa (Min)	Nipple	15.0
Elastic Modulus Gpa (Max)	Electrode	9.3
Elastic Modulus Gpa (Max)	Nipple	14.0
Ash % (Max)	Electrode	0.1
Ash % (Max)	Nipple	0.1
CTE (100-600℃) 100¯⁶/℃(Max)	Electrode	2.9
CTE (100-600℃) 100¯⁶/℃(Max)	Nipple	2.7

Current Load

NOMINAL DIAMETER	REGULAR POWER
MM	INCH	CURRENT LOAD (A)	CURRENT DENSITY (A/CM²)
75	3	1000-1400	22-31
100	4	1500-2400	19-30
130	5	2200-3400	17-26
150	6	3000-4500	16-25
200	8	5500-9000	18-25
250	10	8000-13000	18-25
300	12	13000-17400	17-24
350	14	17400-24000	17-24
400	16	21000-31000	16-24
450	18	25000-40000	15-24
500	20	30000-48000	15-24
550	22	34000-53000	14-22
600	24	38000-58000	13-21
650	25	41000-65000	12-20
700	28	45000-72000	12-19

Graphite Electrode Size & Tolerance

DIAMETER (MM)					LENGTH (MM)
NOMINAL DIAMETER		ACTUAL DIAMETER			NOMINAL LENGTH	TOLERANCE	SHORT LENGTH
INCH	MM	MAX	MIN	ROUGH SPOT	NOMINAL LENGTH	TOLERANCE	SHORT LENGTH
3	75	78	73	72	1000/1200/1400/1600	±100	-275
4	100	103	98	97	1000/1200/1400/1600
5	130	132	127	126	1000/1200/1400/1600
6	150	154	149	146	1200/1400/1600/1800
7	175	179	174	171	1200/1400/1600/1800
8	200	205	200	197	1600/1800
9	225	230	225	222	1600/1800
10	250	256	251	248	1600/1800/2000
12	300	307	302	299	1600/1800/2000/2200
14	350	358	352	349	1600/1800/2000/2200
16	400	409	403	400	1600/1800/2000/2200
18	450	460	454	451	1600/1800/2000/2200
20	500	511	505	502	1800/2000/2200/2400
22	550	562	556	553	1800/2000/2200/2400
24	600	613	607	604	2000/2200/2400/2700
26	650	663	659	656	2400/2700
28	700	714	710	707	2400/2700

Surface Quality

1. There are no more than two defects or holes on the surface of the electrode and the size shall not exceed the value in the following table.

2. There is no transverse crack or longitudinal crack with width of 0.3-1.0 on the surface of the electrode. The length of longitudinal crack is not more than 5% of the perimeter of the electrode. The crack with width less than 0.3mm shall be ignored.

3. The width of black skin area on the surface of the electrode is less than 1/10 of the perimeter of the electrode and its length is less than 1/3 of the length of the electrode.

SPECIFICATION

SIZE

NOMINAL DIAMETER OF
GRAPHITE ELECTRODE (MM)

75-225

250-400

450-800

Diameter(mm)

10-20

20-30

30-40

Depth(mm)

3-5

5-10

10-15

Coupling Torque Reference For Nipple & Electrode

ELECTRODE DIAMETER	Inch	8	9	10	12	14	16	18	20	22	24
ELECTRODE DIAMETER	mm	200	225	250	300	350	400	450	500	550	600
BREAKAWAY TORQUE	n.m	200-260	300-340	400-450	550-650	800-950	900-1100	1100-1400	1500-2000	1900-2500	2400-3000