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

Brosur & Katalog Produk / Brosur & Katalog Produk

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1. MANUFACTURERS OF A DIVERSE RANGE OF ADVANCED WELDING CONSUMABLES SECTION 5 RD-18B LOW HYDROGEN - IRON POWDER ELECTRODE FOR WELDING 1.25Cr-0.5Mo STEELS OPERATING AT ELEVATED TEMPERATURES UP TO 550 º C DATA SHEET NO. 49 SPECIFICATION AWS A5.5 BS EN ISO 3580B JIS Z 3223 CLASSIFICATION E8018-B2 E5518-1CM DT2318 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 powder, 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 significant proportion of iron powder ensures maximum deposition efficiency without detracting from its ability to be used in all positions except ve rtical 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 PLATES TO: BS1501: Part 2 Grades 620 and 621 ASTM A387 (pressure vessels) Grades 11 and 12. FORGINGS TO: BS 1503 Grade 620 and 621 CASTINGS TO: BS 1504 Grade 620 and BS3100 Grade B2. ASTM A217 WC6, WC11 PIPES TO: BS 3604 Grades 620 and 621. ASTM A335 Grades P11 and P12. ASTM A155 Grades ½Cr and 1¼Cr. A182F11 and F12. TUBES TO: BS 3059 Grade 620, ASTM A199, A200 & A213 Grades T11 & T12. HEAT AND CREEP RESISTANCE UP TO 550 º C WHEN WELDING. PRE-HEAT & INTERPASS TEMPERATURES 160 º C MIN AND UP TO 250 º C FOR THICK SECTIONS. WELD METAL ANALYSIS COMPOSITION % BY Wt. C Mn Si S P Cr Mo Fe MIN 0.05 - - - - 1.00 0.40 MAX 0.12 0.90 0.8 0.03 0.03 1.50 0.65 TYPICAL 0.07 0.80 0.3 0.01 0.01 1.25 0.55 Bal. ALL WELD METAL PROPERTIES (AFTER PWHT : 690 ± 15ºC) PROPERTY UNITS MINIMUM TYPICAL OTHERS Tensile strength N/mm 2 550 715 0.2% Proof stress N/mm 2 460 550 Elongation on 4d % 19 24 Reduction of Area (RA) % - 75 Impact energy 0 o C J - 70 H.V. AS WELDED 250 WELDING AMPERAGE AC or DC Ø (mm) 2.6 3.2 4.0 5.0 MIN 50 80 110 140 MAX 90 130 170 180 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 DS49 RD-18B Rev. 2, Date 11.10.2010

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