Nikko Steel Kawat Las Elektroda Mo & CrMo Alloyed Heat & Creep Resisting Steels RD-718A

Brosur & Katalog Produk / Brosur & Katalog Produk

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1. UNCONTROLLED MANUFACTURERS OF A DIVERSE RANGE OF ADVANCED WELDING CONSUMABLES SECTION 5 RD-718A LOW HYDROGEN - IRON POWDER ELECTRODE FOR WELDING CREEP RESISTING Mo-CONTAINING FERRITIC STEELS OPERATING UP TO 450ºC DATA SHEET NO. 46 SPECIFICATION AWS A5.5 BS EN ISO 2560B CLASSIFICATION E7018-A1 E4918-1M3 PRODUCT DESCRIPTION The design emphasis of the chemically basic flux is engineered to ensure the optimum weld metal properties demanded by the speci fication 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 silicates that ensures both coating strength and a coating resistant to subsequent moisture absorption . WELDING FEATURES OF THE ELECTRODE The chemical nature of the flux together with a sig nificant proportion of iron powder ensures maximum deposition efficiency withou t 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. APPLICATIONS AND MATERIALS TO BE WELDED Nominal 0.5Mo content improves elevated temperature performance of weld metal over C:Mn types operating at 450ºC. Materials to be welded include: ASTM A335-P1 A209 and A250-Tl BS3059-243-3606-243-245 2U Forged ASTM A336-F1 A204 A, B and C. Cast ASTM A217-WC1 A352-LC1 C Mn Si S P Mo Fe MIN - - - - - 0.40 MAX 0.12 0.9 0.8 0.03 0.03 0.65 WELD METAL ANALYSIS COMPOSITION % BY Wt. TYPICAL 0.09 0.8 0.4 0.01 0.01 0.50 Bal. PROPERTY UNITS MINIMUM TYPICAL OTHERS Tensile strength N/mm 2 490 550 0.2% Proof stress N/mm 2 390 480 Elongation on 4d % 22 30 ALL WELD METAL PROPERTIES Reduction of Area (RA) % - 70 PROPERTIES MAINTAINED AFTER PWHT AT 620 ºC Ø (mm) 2.6 3.2 4.0 5.0 MIN 60 90 140 180 WELDING AMPERAGE AC or DC+ MAX 100 150 190 200 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. PRE-HEAT 50 – 250ºC DEPENDING ON THICKNESS AND RESTRAINT WI-0304 DS46 RD-718A Rev. 2, Date 01.12.2013

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