1. MANUFACTURERS OF A DIVERSE RANGE OF ADVANCED WELDING CONSUMABLES SECTION 3 ED-7 A FLUX COATED ELECTRODE FOR STRUCTURAL STEELS BASED ON ILLMENITE BALANCED WITH AMPHOTERIC MINERALS, THAT OFFERS SIGNIFICANT ADVANTAGES OVER CONVENTIONAL TYPES WHEN THICKER STEEL SECTIONS ARE INVOLVED DATA SHEET NO. 12 SPECIFICATION JIS Z 3211 CLASSIFICATION D4301 PRODUCT DESCRIPTION The combination of illmenite and amphoteric minerals are balanced to produce a highly viscous slag ideal for vertical up techniques when a heavy weld deposit is needed and also overhead welding. The flux containing alloying and deoxidising ferro alloys are extruded onto a mild steel core wire using a blend of potassium rich silicates that ensures both coating strength and a coating resistant to subsequent moisture absorption. WELDING FEATURES OF THE ELECTRODE Arc stability is excellent both AC and DC. Weld seams are smooth and evenly rippled and fillet welds are slightly convex. Slag detachability is also very good. The physical soundness of the welds are excellent with reference to x-ray quality as its resistance to solidification cracking on relatively thick steel sections. Metal recovery is some 95% with respect to weight of core wire. APPLICATIONS AND MATERIALS TO BE WELDED All positional welding of structural steels, particularly using vertical up and overhead techniques for the following and related steel specifications: Mild and medium carbon-manganese steels up to 15 mm thick (for several circumtances can be used up to 25 mm thickness) with a UTS of 500 N/mm 2 max. Typical grades : BS 1449 plate and sheet, BS 4360 grades 43A and 43C, Lloyds A & D ship steel BS 4360 grade 50B Lloyds grades AH and DH, BS 3059 and BS 3601 grade 320-410 API 5L A-B and X42. WELD METAL ANALYSIS COMPOSITION % BY Wt. C Mn Si S P Cr Ni Mo V Fe MIN - - - - - - - - - MAX 0.2 1.2 1.0 - - 0.2 0.3 0.3 0.08 TYPICAL 0.1 0.4 0.2 0.01 0.02 0.1 0.1 0.01 0.01 Bal. WELD METAL PROPERTIES (ALL WELD METAL) PROPERTY UNITS MINIMUM TYPICAL OTHERS Tensile strength N/mm 2 420 475 0.2% Proof stress N/mm 2 345 400 Elongation on 4d % 22 29 Reduction of Area (RA) % - 73 Impact energy 0 o C J 47 89 WELDING AMPERAGE AC or DC Ø (mm) 2.6 3.2 4.0 5.0 MIN 70 90 130 160 MAX 120 150 190 250 OTHER DATA Electrodes that have become damp should be re-dried at 110 o C for 1 hour. RELATED PRODUCTS Please contact our Technical Department for detail. WI-0304 DS12 ED-7 Rev. 1, Date 01.11.2010