FOR WELDING 347 CLAD STEELS OR WHERE NIOBIUM STABILISED WELD METAL IS REQUIRED IN OVERLAYS, OR INLAYS, ON C-Mn OR LOW-ALLOY STEELS
NSN-309Nb
CLASSIFICATION
AWS A5.4 E309Nb-16 | EN ISO 3581-A E 23 12 Nb R | JIS Z 3221 D309Nb-16
PRODUCT DESCRIPTION
A metallurgically advanced rutile based flux formulated with balanced additions of chemically basic, amphoteric and acid minerals, together with small alloy additions to compensate for arc losses. Niobium contained on the deposits could provides resistance to carbide precipitation and increases intergranular corrosion resistance, and also provides higher strength in elevated-temperature service
WELDING FEATURES OF THE ELECTRODE
This unique flux formulation ensures excellent arc stability, ease of initial arc strike and re-strike minimal spatter on AC and virtually none on DC+. The resultant weld seams are smooth, evenly rippled and free from undercut while slag detachability is excellent. Metal recovery is some 103% with respect to core wire weight
APPLICATIONS AND MATERIALS TO BE WELDED
Applications for the electrode are to be found in the Chemical, Petro-Chemical and Cryogenic Processing and Storage Industries as well as the Food, Brewery and Pharmaceutical Industries. Used for welding of AISI 309 or 309S stainless steel castings. It is also suitable for joining of dissimilar steels such as 18% Cr – 8% Ni stainless steel to mild steel, and welding type 347 clad steels. Can also be used for the overlay of carbon steel.
WELDING AMPERAGE AC and DC
OTHER DATA
Electrodes that have become damp should be re-dried at 150oC for 1 hour
