1. MANUFACTURERS OF A DIVERSE RANGE OF ADVANCED WELDING CONSUMABLES SECTION 11 FC-25 SELF GAS SHIELDING FLUX AND METAL FILLED CORED WIRE FOR REBUILDING AND WEAR SURFACING APPLICATIONS INVOLVING LIGHT INTERMETALLIC ABRASION DATA SHEET NO. 158 SPECIFICATION DIN 8555 CLASSIFICATION MF1-200-G PRODUCT DESCRIPTION A tight seamed roll-drawn tubular wire containing an evenly distributed mixture of alloying elements, deoxidants and chemically basic minerals. The minerals dissociate during welding to provide a full protective self-shielding gas which eliminates the need for an external separate shielding gas. WELDING FEATURES OF THE ELECTRODE Suitable for use on DC+ only, the strong forcefull arc is readily controllable and the high silicon content of the alloy lowers the surface tension of the molten weld pool, thus allowing ease of weaving and thus minimal dilution. Weld beads are bright and smooth and free from porosity. The slag volume is minimal and metal recovery is about 90% with respect to weight of the consumable. APPLICATIONS AND MATERIALS TO BE WELDED May be used as a hardfacing alloy in its own right when maximum resistance when metal to metal wear is involved which needs to be combined with alloy machinability. However, its main use is as a buffer build-up or cushion layer on heavily worn components prior to depositing much harder alloys. The alloy may also be used for the repair of casting defects on C Mn steel castings. WELD METAL ANALYSIS COMPOSITION % BY Wt. C Mn Si S P Cr Ni Fe MIN 0.10 - - - - - - MAX 0.30 1.5 0.8 0.03 0.03 0.5 0.5 TYPICAL 0.15 1.4 0.3 0.005 0.01 0.05 0.02 Bal. WELD METAL HARDNESS (ALL WELD METAL) AS WELDED 150° INTERPASS/PRE-HEAT ON C-Mn STEEL STRESS RELIEVED AT 600°/FUR.COOLED ON C-Mn STEEL 1 ST LAYER HRC 18 1 ST LAYER HRC 15 2 ND LAYER HRC 20 2 ND LAYER HRC 18 3 RD LAYER HRC 22 3 RD LAYER HRC 20 MAY BE CASE HARDENED WELDING AMPERAGE DC+ Ø ( Ø mm) 2.4 2.8 3.2 MIN 180 250 300 MAX 300 350 400 OTHER DATA Wires that have become damp should be re-dried at 120°C for 1 hour. RELATED PRODUCTS Please contact our Technical Department for details. WI-0304 DS158 FC-25, Rev. 1, Date 01.05.2009