SUPRAMAX – 18
Classification : AWS : E7018 , BIS : EB5426H2JX
Characteristics : This Is a heavy coated, low hydrogen – Iron powder, all positions electrode with very smooth arc, nominal spatter and medium penetration. Extremely ductile weld metal is crack resistant. Recommended for heavy structures subjected to dynamic loading & mechanical restraint. Electrode delivers welds of radiographic quality with a deposition efficiency of 115% approx.
Applications : For castings replaced by heavy welded fabrications, pressure vessels, penstocks, bridges, for root passes in heavy structures subjected to mechanical restraint and dynamic loading, boilers. Specially for IS-2062, steel having thickness beyond 20mm and carbon steel of any thickness.
Weld Metal Properties (%)
C = 0.05-0.10 Max Mn = 0.80-1.60 Max
Si = 0.40-0.70 Max S = 0.03 Max
P = 0.03 Max
All Weld Mechanical Properties
UTS = 500-640 N/mm2
YS = 450-550 N/mm2
Elong (L=4d) % = 24-30 Reduction in area % = 60 – 75
CVN Impact Value (J) at – 30°C:50-100 -46°C:30-50
Precautions : Preheat the electrodes at 250°C temp & hold it 50°C while in use.