Specifications of NP electrode
Item |
Classification |
Unit |
Normal Diameter (mm) |
75-150 |
200-225 |
250-350 |
400 |
450-500 |
Electrical Resistance (≤) |
Pole |
uΩm |
7.5 |
8 |
8 |
8.5 |
9 |
Nipple |
6. 5 |
7 |
7 |
7.5 |
7.5 |
Bending Strength ≥ |
Pole |
Mpa |
10 |
10 |
9.8 |
9.8 |
9.8 |
Nipple |
14 |
14 |
15 |
15 |
15 |
Young`s Modulus (≤) |
Pole |
Gpa |
12 |
12 |
12 |
12 |
12 |
Nipple |
14 |
14 |
14 |
14 |
14 |
Bulk Density (≥) |
Pole |
g/cm3 |
1.65 |
1.6 |
1.6 |
1.58 |
1.58 |
Nipple |
1.72 |
1.72 |
1.72 |
1.7 |
1.7 |
CTE(≤)(100¡æ-600¡æ) |
Pole |
X10-6/ ¡æ |
2.7 |
2.7 |
2.7 |
2.7 |
2.7 |
Nipple |
2.5 |
2.4 |
2.4 |
2.4 |
2.4 |
Ash (≤) |
|
% |
0.5 |
0.5 |
0.5 |
0.5 |
0.5 |
Note: CTE and Ash contents are only for reference
Specification of HP electrode
Item |
Classification |
Unit |
Normal Diameter (mm) |
75-150 |
200-225 |
250-300 |
350-500 |
550-600 |
Electrical Resistance (≤) |
Pole |
uΩm |
7 |
7 |
6.5 |
6.5 |
7 |
Nipple |
6 |
6 |
6 |
5.5 |
5.8 |
Bending Strength (≥) |
Pole |
Mpa |
9.8 |
9.8 |
9.8 |
10.5 |
10.5 |
Nipple |
14 |
14 |
15 |
16 |
16 |
Young`s Modulus (≤) |
Pole |
Gpa |
12 |
12 |
12 |
12 |
12 |
Nipple |
14 |
14 |
14 |
16 |
16 |
Bulk Density(≥) |
Pole |
g/cm3 |
1.7 |
1.68 |
1.65 |
1.62 |
1.62 |
Nipple |
1.8 |
1.72 |
1.72 |
1.72 |
1.72 |
CTE(≤)(100¡æ-600¡æ) |
Pole |
X10-6/ ¡æ |
2.7 |
2.7 |
2.7 |
2.4 |
2.4 |
Nipple |
2.5 |
2.2 |
2.2 |
2.1 |
2.1 |
Ash (≤) |
|
% |
0.5 |
0.5 |
0.5 |
0.3 |
0.3 |
Note: CTE and Ash contents are only for reference
Specification of SHP electrode
Item |
Classification |
Unit |
Normal Diameter (mm) |
300 |
350-400 |
450-500 |
Electrical Resistance (≤) |
Pole |
uΩm |
7 |
6.5 |
6.5 |
Nipple |
5.5 |
5.5 |
5.5 |
|
Pole |
Mpa |
10.5 |
10.5 |
10.5 |
Nipple |
16 |
18 |
18 |
Young`s Modulus (≤) |
Pole |
Gpa |
14 |
14 |
14 |
Nipple |
18 |
18 |
18 |
Bulk Density(≥) |
Pole |
g/cm3 |
1.62 |
1.64 |
1.63 |
Nipple |
1.75 |
1.72 |
1.72 |
CTE(≤)(100¡æ-600¡æ) |
Pole |
X10-6/ ¡æ |
2.4 |
2.2 |
2.2 |
Nipple |
1.6 |
1.6 |
1.6 |
Ash (≤) |
|
% |
0.3 |
0.3 |
0.3 |
Note: CTE and Ash contents are only for reference
Specification of UHP electrode
Item |
Classification |
Unit |
Normal Diameter (mm) |
300-400 |
450-500 |
550-600 |
Electrical Resistance (≤) |
Pole |
uΩm |
6 |
5.5 |
5.5 |
Nipple |
5 |
4.5 |
4.5 |
Bending Strength (≥)
|
Pole |
Mpa |
10.5 |
10.5 |
11 |
Nipple |
18 |
18 |
20 |
Young`s Modulus (≤) |
Pole |
Gpa |
14 |
14 |
14 |
Nipple |
18 |
18 |
22 |
Bulk Density(≥) |
Pole |
g/cm3 |
1.66 |
1.66 |
1.66 |
Nipple |
1.75 |
1.75 |
1.75 |
CTE(≤)(100¡æ-600¡æ) |
Pole |
X10-6/ ¡æ |
1.5 |
1.5 |
1.4 |
Nipple |
1.4 |
1.4 |
1.2 |
Ash (≤) |
|
% |
0.3 |
0.3 |
0.3 |
Suggested Operation Current
Nominal Diameter |
Suggested Operation Current£¨AMPER£© |
NP |
HP |
SHP |
UHP |
75 |
1000-1400 |
¡¡ |
¡¡ |
¡¡ |
100 |
1500-2400 |
¡¡ |
¡¡ |
¡¡ |
150 |
3000-4500 |
¡¡ |
¡¡ |
¡¡ |
200 |
5000-6900 |
5500-9000 |
¡¡ |
¡¡ |
250 |
7000-10000 |
8000-13000 |
¡¡ |
¡¡ |
300 |
10000-13000 |
13000-17400 |
14000-19000 |
15000-22000 |
350 |
13500-18000 |
17400-24000 |
19000-28000 |
20000-30000 |
400 |
18000-23500 |
21000-31000 |
23000-35000 |
25000-40000 |
450 |
22000-27000 |
25000-40000 |
30000-42000 |
32000-45000 |
500 |
25000-32000 |
30000-48000 |
35000-50000 |
38000-55000 |
550 |
28000-36000 |
34000-55000 |
¡¡ |
45000-65000 |
600 |
35000-41000 |
38000-61000 |
¡¡ |
50000-75000 |
Note: On EAF£¬the current should be reduced by 10%.On LF,the current should be increased by 10%.
Specification and Allowance of Graphite Electrode
Nominal Diameter |
¡¡ |
Actual Diameter |
¡¡ |
Nominal Length |
¡¡ |
Allowance |
mm |
Inch |
Max |
Min |
mm |
Inch |
mm |
75 |
3 |
77 |
74 |
1000/1200 |
40/48 |
+50/-75 |
100 |
4 |
102 |
99 |
1200/1500 |
48/60 |
+50/-75 |
150 |
6 |
154 |
151 |
1700 |
68 |
+/-100 |
200 |
8 |
204 |
201 |
1500/1800 |
60/72 |
+/-100 |
225 |
9 |
230 |
226 |
1500/1800 |
60/72 |
+/-100 |
250 |
10 |
256 |
252 |
1500/1800 |
60/72 |
+/-100 |
300 |
12 |
307 |
303 |
1800 |
72 |
+/-100 |
350 |
14 |
357 |
353 |
1800/2100 |
72/84 |
+/-100 |
400 |
16 |
408 |
404 |
1800/2100 |
72/84 |
+/-100 |
450 |
18 |
459 |
455 |
1800/2100 |
72/84 |
+/-100 |
500 |
20 |
510 |
506 |
1800/2100 |
72/84 |
+/-100 |
550 |
22 |
562 |
556 |
2100/2400 |
84/96 |
+/-100 |
600 |
24 |
613 |
607 |
2400 |
96 |
+/-100 |
Dimensions of Tapered 3TPI Nipples
Diameter |
Nipple |
Socket |
mm |
Inch |
Nipple Type |
D |
L |
d2 |
I |
d1 |
H |
225 |
9 |
T3 |
139.7 |
-0.5 |
203.2 |
-1 |
90.8 |
-3 |
10 |
131.26 |
0-+0.5 |
104.6 |
0-+0.7 |
250 |
10 |
T3 |
155.58 |
-0.5 |
203.1 |
-1 |
103.8 |
-3 |
10 |
147.14 |
0-+0.5 |
113.05 |
0-+0.7 |
300 |
12 |
T3S |
155.58 |
-0.5 |
220.1 |
-1 |
103.8 |
-3 |
10 |
147.14 |
0-+0.5 |
113.05 |
0-+0.7 |
300 |
12 |
T3 |
177.17 |
-0.5 |
270.9 |
-1 |
116.9 |
-3 |
10 |
168.73 |
0-+0.5 |
138.45 |
0-+0.7 |
350 |
14 |
T3 |
215.9 |
-0.5 |
304.8 |
-1 |
150 |
-3 |
10 |
207.47 |
0-+0.5 |
155.4 |
0-+0.7 |
400 |
16 |
T3S |
215.9 |
-0.5 |
304.8 |
-1 |
150 |
-3 |
10 |
207.47 |
0-+0.5 |
155.4 |
0-+0.7 |
400 |
16 |
T3 |
241.3 |
-0.5 |
338.6 |
-1 |
169.8 |
-3 |
10 |
232.87 |
0-+0.5 |
172.3 |
0-+0.7 |
400 |
16 |
T3L |
241.3 |
-0.5 |
355.6 |
-1 |
166 |
-3 |
10 |
232.87 |
0-+0.5 |
180.8 |
0-+0.7 |
450 |
18 |
T3S |
241.3 |
-0.5 |
338.6 |
-1 |
169.8 |
-3 |
10 |
232.87 |
0-+0.5 |
172.3 |
0-+0.7 |
450 |
18 |
T3 |
273.05 |
-0.5 |
355.6 |
-1 |
198.7 |
-3 |
10 |
264.62 |
0-+0.5 |
180.8 |
0-+0.7 |
500 |
20 |
T3S |
273.05 |
-0.5 |
355.6 |
-1 |
198.7 |
-3 |
10 |
264.62 |
0-+0.5 |
180.8 |
0-+0.7 |
500 |
20 |
T3 |
298.45 |
-0.5 |
372.6 |
-1 |
221.3 |
-3 |
10 |
290.02 |
0-+0.5 |
198.25 |
0-+0.7 |
Dimensions of Tapered 4TPI Nipples
Diameter |
Nipple |
Socket |
mm |
inch |
Nipple Type |
D |
L |
d2 |
I |
d1 |
H |
75 |
3 |
T4 |
46.04 |
-0.5 |
76.2 |
-1 |
20.8 |
-3 |
6 |
39.72 |
0-+0.5 |
41.1 |
0-+0.7 |
100 |
4 |
T4 |
69.85 |
-0.5 |
101.6 |
-1 |
40.3 |
-3 |
6 |
63.53 |
0-+0.5 |
53.8 |
0-+0.7 |
150 |
6 |
T4 |
92.08 |
-0.5 |
139.7 |
-1 |
56.2 |
-3 |
6 |
85.76 |
0-+0.5 |
72.85 |
0-+0.7 |
200 |
8 |
T4 |
122.24 |
-0.5 |
177.8 |
-1 |
80 |
-3 |
6 |
115.92 |
0-+0.5 |
91.9 |
0-+0.7 |
250 |
10 |
T4 |
152.4 |
-0.5 |
190.5 |
-1 |
108 |
-3 |
6 |
146.08 |
0-+0.5 |
101.3 |
0-+0.7 |
300 |
12 |
T4 |
177.8 |
-0.5 |
215.9 |
-1 |
129.2 |
-3 |
6 |
171.48 |
0-+0.5 |
114 |
0-+0.7 |
350 |
14 |
T4 |
203.2 |
-0.5 |
254 |
-1 |
148.2 |
-3 |
6 |
196.88 |
0-+0.5 |
133 |
0-+0.7 |
400 |
16 |
T4 |
222.25 |
-0.5 |
304.8 |
-1 |
158.8 |
-3 |
6 |
215.93 |
0-+0.5 |
158.4 |
0-+0.7 |
400 |
16 |
T4L |
222.2 |
-0.5 |
355.6 |
-1 |
150 |
-3 |
6 |
215.93 |
0-+0.5 |
180.8 |
0-+0.7 |
450 |
18 |
T4 |
241.3 |
-0.5 |
304.8 |
-1 |
177.9 |
-3 |
6 |
234.98 |
0-+0.5 |
158.4 |
0-+0.7 |
450 |
18 |
T4L |
241.3 |
-0.5 |
355.6 |
-1 |
170 |
-3 |
6 |
234.98 |
0-+0.5 |
183.8 |
0-+0.7 |
500 |
20 |
T4 |
269.88 |
-0.5 |
355.6 |
-1 |
198 |
-3 |
6 |
263.56 |
0-+0.5 |
183.8 |
0-+0.7 |
500 |
20 |
T4L |
269.88 |
-0.5 |
457.2 |
-1 |
181.1 |
-3 |
6 |
263.56 |
0-+0.5 |
234.6 |
0-+0.7 |
550 |
22 |
T4 |
298.45 |
-0.5 |
355.6 |
-1 |
226.6 |
-3 |
6 |
292.13 |
0-+0.5 |
183.8 |
0-+0.7 |
550 |
22 |
T4L |
298.45 |
-0.5 |
457.2 |
-1 |
209.7 |
-3 |
6 |
292.13 |
0-+0.5 |
234.6 |
0-+0.7 |
600 |
24 |
T4 |
317.5 |
-0.5 |
355.6 |
-1 |
245.6 |
-3 |
6 |
311.18 |
0-+0.5 |
83.8 |
0-+0.7 |
600 |
24 |
T4L |
317.5 |
-0.5 |
457.2 |
-1 |
228.7 |
-3 |
6 |
311.18 |
0-+0.5 |
234.6 |
0-+o.7 |
|