COSMAX – 308
Classification : AWS : E 308-16 , IS 5206 : E19.9R16
Characteristics : This Is an AC/DC rutile coated stainless steel electrode with unique low moisture absorption coating which deposits low carbon 19 Cr, 10 Ni type metal. Weld metal is suitable for high polish, excellent welding characteristics and slag detachability. The weld metal has excellent creep strength and is of Radiographic quality.
Applications : It is Ideally suited for welding of stainless steel of A ISI301,302,304,308 and their cast versions used for hospital apparatus, aircraft frames, drugs and pharmaceuticals equipments. Apparatus for nitric acid, milk pump Impellers and shafts, valve faces, valve seats and chemical plants.
Weld Metal Properties (%) :
C = 0.08 Max Mn = 0.5-2.5
SI = 0.3-0.9 S = 0.03 Max
P = 0.03 Max Cr = 18.0-21.0
NI = 9.0-11.0 Ferrite = 3-7
All Weld Mechanical Properties :
UTS = 560-660 N/mm2
YS = 350-450 N/mm2
Elong (L=4d) % = 35-45
CVN Impact Value Temp°C at 27 + 2 °C – 55
Current Condition – AC or DC (+)
Ferrite 4 – 8 FN
Precautions : Ensure that the electrodes are perfectly dry before use. In case of moisture pick-up, re-dry the electrodes at 200°C. Clean the welding area thoroughly free of any surface contaminations.