Nikko Steel Kawat Las Elektroda Mo & CrMo Alloyed Heat & Creep Resisting Steels RD-18B9

Brosur & Katalog Produk / Brosur & Katalog Produk

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1. MANUFACTURERS OF A DIVERSE RANGE OF ADVANCED WELDING CONSUMABLES SECTION 5 RD-18B9 BASIC LOW HYDROGEN ELECTRODE FOR WELDING MODIFIED 9Cr-1Mo STEELS OPERATING AT ELEVATED TEMPERATURES UP TO 650 º C DATA SHEET NO. 56 SPECIFICATION AWS A5.5 BS EN 1599 CLASSIFICATION E9018-B9 E CrMo91 B WELDING FEATURES OF THE ELECTRODE The chemical nature of the flux together with a significant proportion of iron powder ensures maximum deposition efficiency without detracting from its ability to be used in all positions except vertical down. Overall the arc is very stable, slag detachability is good and metal recovery is some 115% with respect to the core wire. PRODUCT DESCRIPTION The design emphasis of the chemically basic flux is engineered to ensure the optimum weld metal properties demanded by the specification are fully met. The basic flux containing the appropriate alloying elements with a controlled balanced addition of iron power, is extruded onto a high purity ferritic core wire with a blend of silicated that ensures both coating strength and a coating resistant to subsequent moisture absorption . APPLICATIONS AND MATERIALS TO BE WELDED PLATE ASTM A387 Grade 91, TUBES/PIPES ASTM A335 Grade 91, A234 Grade WP91, A199 Grade T91, A213 Grade T91. BS 3604 Grades CFS & HFS 629-470 CFS/HFS 629-590. FORGINGS A182 Grade F91, A336 Grade F91 CAST ASTM A217 Grade C12A, BS1503 Grade 91 PWHT recommended range is 745 - 775 º C (2 hours), pre-heat 200 - 300 º C. Cool to 150 º C before PWHT. WELD METAL ANALYSIS COMPOSITION % BY Wt. C Mn Si S* P* Cr Ni Mo Nb V Al N MIN 0.08 - - - - 8.0 - 0.85 0.02 0.15 - 0.02 MAX 0.13 1.2 0.30 0.015 0.015 10.5 0.8 1.2 0.10 0.30 0.04 0.07 TYPICAL 0.10 0.8 0.25 0.01 0.01 8.5 0.4 1.0 0.03 0.20 0.01 0.03 * AWS A5.5 specifies S = 0.01% max. and P = 0.01% max. ALL WELD METAL PROPERTIES (AFTER PWHT) PROPERTY UNITS MINIMUM TYPICAL OTHERS Tensile strength N/mm 2 620 750 – 880 0.2% Proof stress N/mm 2 530 620 – 780 Elongation on 4d % 17 21 Reduction of Area (RA) % - 60 Impact energy 20 o C J - 65 Results relate to PWHT 765ºC furnace cooled WELDING AMPERAGE AC or DC+ Ø (mm) 2.6 3.2 4.0 5.0 MIN 50 75 130 180 MAX 85 125 170 220 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 DS56 RD-18B9 Rev. 4, Date 01.01.2013

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