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Cast Iron Electrodes
CLASSIFICATION
- AWS/A5.1:E-7018
- IS: EB 5426 H3JX
Electro - 7018 is heavy coated low hydrogen, iron powder type electrode producing a crack resistant, tough and ductile welds of radiographic quality. The smooth, soft arc, easy slag control, all position welding, low spatter and excellent slag release provide maximum weld appeal. The electrode has a metal recovery of minimum 110%. Suitable for heavy structures subjected to dynamic loading and impact, highly restrained joints, earth moving equipment, coaches, ships etc.
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Chemical Composition (%)
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C
0.06
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Mn
1.10
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Si
0.45
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S
0.015
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P
0.02
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Mechanical Properties
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Ys
(N/mm2)
460
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UTS
(N/mm2)
560
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Elong(%)
(L=5d)
28
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Impact Value in Joules at 30 oC 50/90
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Current Data
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Size (mm)
Current (amp)
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2.5 x 350
70-100
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3.15 x 450
100-140
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4.00 x 450
140-180
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Size (mm)
Current (amp)
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5.00 x 450
180 - 240
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Current Conditions
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AC (70V)/ DC (+)
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Precautions
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The electrode should be stored in warm and dry place. Electrode should be used in recommended current range. Preheating the electrodes at 350 o C for one hour before use give better results.
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