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AS-8
Retards hydrogen induced embrittlement.x-ray quality welds and superior moisture resistance.
Alloy Base
Fe, Mn, Si
Special Features
Recommendations
Specially these are meant for joining and build up of low alloy high tensile steels, problem steels having sulphur, low carbon steels medium carbon steels to mild steels and other alloys added to base metal for better machinability. Those alloying elements which can cause porosity hidden defect are purged with the electrode arc action from the molten pool. Most suitable where toughness and weld reliability are important.
Principal Applications
Heavy vehicle chassis, heavy equipment maintenance. heavy structures, automotive frames, liquid tankers hubs. loco frames, crane jibs & booms & tanks material handling equipment structures. pressure vessels, gun plates, steels casting & high pressure piping repair and build up of '1' areas of buckets and excavators. Depestric and boom crack of shovel.
Procedure
Clean weld area of surface contamination and then gouge or grind all cracks or defects. Use short arc for horizontal fillets. For vertical joints use rapid weaving and start welding from bottom, preheating may prove beneficial.
Tensile strength
55-62 Kgf/mm2
Elongation
28-32%
Recommended Amperage AC(70V)/DC(+)
| Size (mm) | 2.0 | 2.5 | 3.15 | 4.0 | 5.0 |
| Current(AMPS) | 35-55 | 60- 80 | 100-140 | 120-160 | 150-200 |