1. MANUFACTURERS OF A DIVERSE RANGE OF ADVANCED WELDING CONSUMABLES SECTION 6 NDS-25.9.4.NL FOR WELDING DUPLEX STAINLESS STEELS THAT NEED A MATCHING MICROSTRUCTURE IN THE AS WELDED CONDITION - NAMELY 55 TO 65 AUSTENITE 35 TO 45 FERRITE DATA SHEET NO. 83 SPECIFICATION AWS A5.4 BS EN 1600 CLASSIFICATION E2594-16 E 25 9 4 N L B 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 ASTM A890 6A, ACI CD 3MWCuN and ACICE 3Mn Proprietary alloys include SAF 2507, AVESTA UR47N (CLI), ZERON 100 (WP) UNS S32550, S32520 UR 52N + (CLI), FERRALIUM S D40, DP 3W (SUMITOMO) - MoPlus CARPENTER. Designed for use in the as welded condition they can however be subjected to full heat treatment, eg: 1150 º C then water quenched - but some reduction in ferrite may occur and this should be considered in relation to the specification. WELD METAL ANALYSIS COMPOSITION % BY Wt. C Mn Si S P Cr Ni Mo Cu N MIN - 0.5 - - - 24 8.0 3.5 - 0.2 MAX 0.04 2.0 1.0 0.03 0.04 27 10.5 4.5 0.75 0.3 TYPICAL 0.02 0.9 0.6 0.005 0.026 25 9.5 3.8 0.7 0.23 WELD METAL PROPERTIES (ALL WELD METAL) PROPERTY UNITS MINIMUM TYPICAL OTHERS Tensile strength N/mm 2 760 900 0.2% Proof stress N/mm 2 - 700 Elongation on 4d % 15 23 Reduction of Area (RA) % - 55 Impact energy 20 o C J - 50 WELDING AMPERAGE AC or DC+ Ø (mm) 2.0 2.6 3.2 4.0 5.0 MIN 35 65 80 120 160 MAX 80 100 125 170 210 OTHER DATA Electrodes that have become damp should be re-dried at 150 o C for 1 hour. RELATED PRODUCTS Please contact our Technical Department for detail. WI-0304 DS83 NDS-25.9.4.NL Rev. 1, Date 01.08.2009