FOR WELDING DUPLEX STAINLESS STEELS THAT NEED A MATCHING MICROSTRUCTURE IN THE AS WELDED CONDITION - NAMELY 55 TO 65 AUSTENITE 35 TO 45 FERRITE
NDS-2209
CLASSIFICATION
AWS A5.4 E2209-16 | EN ISO 3581-A E 22 9 3 N L R
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. The flux is concentrically extruded onto a fully alloyed core wire and bound by a blend of silicates that assures both coating strength and resistance to subsequent moisture absorption.
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
For welding standard 22% Chrome-Duplex Stainless Steels. Typical examples being : ASTM A182 Gr F 51 A890 Grade 4A EN X 2 CrNiMoN 22 5 3
Proprietary alloys include Sandvick SAF 2205, Avesta 2205, Bohler A903, Sumitomo SM 22Cr, Nippon NK Cr22.
WELDING AMPERAGE AC and DC
OTHER DATA
Electrodes that have become damp should be re-dried at 200-250oC for 1 hour before use
