Graphite Electrode

2025-04-15 07:05:00

Graphite electrode is made of mixed petroleum coke and needle coke as raw materials and coal pitch as binder, to be extruded, baked, impregnated, graphitized and machined to use as conductive material on EAF (electric arc furnace)and LF(ladle refining furnace) for steel making, industrial silicon ,yellow phosphorus, corundum and has regular power (RP)impregnated(lP),high power(HP) and ultra-high power(UHP)four series.
Technical Specification of Graphite Electrode

Specifications mm		Bulk Density g/m³		Specific Resistance μΩm		Flexural Strength Mpa		C·T·E(100-600°℃) 10^-6/℃		Elastic Modulus Gpa
Specifications mm		Electrode	Pin	Electrode	Pin	Electrode	Pin	Electrode	Pin	Electrode	Pin
RP	Φ75-Φ150	1.56	1.70	8.5	7	8	17	2.9	2.7	9.3	14
	Φ200-Φ450			8.5	6.5	8.5	17	2.9	2.8	9.3	14
	Φ500-Φ800			9	6.5	8	17	2.9	2.8	9.3	14
HP	Φ75-Φ150	1.65	1.72	7	6	10.5	18	2.7	2.5	12	16
	Φ200-Φ450			6.5	5.5	10.5	18	2.4	2.2	12	16
	Φ500-Φ800			6.5	5.5	10	18	2.4	2.2	12	16
UHP	Φ200-φ450	1.66	1.76	6	4.5	11	19	1.5	1.4	14	18
UHP	Φ500-Φ800	1.66	1.76	6	4.5	11	19	1.5	1.4	14	18

Diameter and Length of Graphite Electrode

Nominal Diameter		Actual Diameter(mm)			Actual Length(mm)
mm	inch	Max	Min	Min Crust Diameter	Standard	Tolerane	Short
75	3	78	73	72	1000	±50	+50,-225
100	4	103	98	97	1200	±50	-(50-225)
130	5.125	132	127	126	1200	±50	-(50-225)
150	6	154	149	146	1600	±100	±100
200	8	205	200	197	1800	±100	-275
250	10	256	251	248	1800	±100
300	12	307	302	299	1800	±100
350	14	358	352	349	1800/2100/2400	±100
400	16	409	403	400	1800/2100/2400	±100
450	18	460	454	451	1800/2100/2400	±100
500	20	511	505	502	1800/2100/2400	±100
550	22	562	556	553	2100/2400/2700	+200	-300
600	24	613	607	604	2100/2400/2700	+200~-150
650	26	663	659	656	2400/2700/3000	+200~-150
700	28	714	710	707	2400/2700/3000	+200~-150
750	30	765	761	758	2400/2700/3000	+200~-150
800	32	816	812	809	2400/2700/3000	+200~-150

Recommended Current Carrying Capacity of Graphite Electrode

Nominal Diameter	RP		HP		UHP
mm	A	A/m³	A	A/m³	A	A/m³
75	1000-1400	3-4.2	-	-	-	-
100	1500-2400	4.5-7.2	-	-	-	-
130	2200-3400	6.6-10.2	-	-	-	-
150	3000-4500	9-13.5	-	-	-	-
200	5000-6900	15~21	5500~9000	18~25	-	-
250	7000~10000	14~20	8000~13000	18~25	-	-
300	10000~13000	14~18	13000~17400	17~24	15000~22000	20~30
350	13500~18000	14~18	17400~24000	17~24	20000~30000	20~30
400	18000~23500	14~18	21000~31000	16~24	25000~40000	19~30
450	22000~27000	13~17	25000~40000	15~24	32000~45000	19~27
500	25000~32000	13~16	30000~48000	15~24	38000~55000	18~27
550	28000~34000	12~14	34000~53000	14~22	45000~65000	18~27
600	30000~36000	11~13	38000~58000	13~21	52000~75000	18~27
650	32000~39000	10~12	41000~65000	12~20	60000~91000	18~27
700	34000~42000	9~11	45000~72000	12~19	70000~120000	18~30
750	41000~51000	9~11	55000~87000	12~19	82000~124000	18~27
800	47000~57000	9~11	62000~99000	12~19	94000~141000	18~27