COSMAX -309
Classification : AWS : 309 16 , IS 5206 : E 23.12 R16
Characteristics : A medium heavy coated, rutile type for all positions electrode giving 25/12 deposit which has excellent corrosion and oxidation resistance In continuous service upto 1100°C. Gives a quiet and stable arc, low spatter, smooth weld bead and easily detachable slag and finelly rippled welds of radiographic quality.
Applications : It Is Ideally suited for welding of stainless steel of AISI 309 grade, 18/8 stainless steel to mild steel, sheet lining of 12% Cr steel to mild steel, overlays of ferrlte steel and difficult to weld steel. Building up mild steel to Improve wear resistance and for building up worn parts of wear resisting steel.
| Weld Metal Properties C = 0.06-0.15 Mn = 0.5-2.5 Si = 0.90 Max S = 0.03 Max P = 0.03 Max Cr = 22.0-25.0 Ni = 12.0-14.0 |
| All Weld Mechanical Properties UTS = 560 N/mm2 YS = 470 N/mm2 Elong (L=4d) % = 30 Min CVN Impact Value Temp°C J 27 ± 2 °C 55-100 Current Condition – AC or DC (+) |
Precautions : Ensure that the electrodes are perfectly dry before use. Moist electrodes should be redried at 150°C for one hour. Use short arc, stringer beads and low current.
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