Nikko Steel Kawat Las Elektroda For Hardfacing and Resurfacing - Build up HV-250

Brosur & Katalog Produk / Brosur & Katalog Produk

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1. MANUFACTURERS OF A DIVERSE RANGE OF ADVANCED WELDING CONSUMABLES SECTION 9 HV-250 RUTILE - LOW ALLOY - HIGH EFFICIENCY HARDFACING ELECTRODE WITH EXCELLENT RESISTANCE TO IMPACT LOADING COMBINED WITH MEDIUM ABRASION RESISTANCE DATA SHEET NO. 109 SPECIFICATION DIN 8555 JIS Z 3251 CLASSIFICATION E1-UM-250-GP DF2A-250-R PRODUCT DESCRIPTION The design emphasis of the alloyed weld metal ensures the desired hardness level of the specification is readily achieved as is the deposits maximum resistance to impact loading combined with medium resistance to abrasion. The flux contains the appropriate alloying elements plus iron powder addition and is extruded onto a ferritic wire with a balance of silicates that ensures both coating strength and resistance to moisture absorption. WELDING FEATURES OF THE ELECTRODE The electrode is suitable for both AC and DC and is used to best advantage in the flat and HF positions. The arc is smooth and stable weld beads are evenly rippled, of bright appearance and the slag readily detachable. the weld deposit is highly crack resistant under normal circumstances, but on high carbon cast steels or restrained sections of mild steel, a preheat of 150 ºC should be used. APPLICATIONS AND MATERIALS TO BE WELDED The main applications occur when intermetalic abrasion is involved, eg: to control wear in interconnecting steel components such as gear wheels, shafts, sprockets, couplings etc. The deposit is machinable thus enabling worn or broken sections to be rebuilt and then reshaped. Similarly the repaired component may be oil quenched to increase hardness or may be case hardened by conventional practices. WELD METAL ANALYSIS COMPOSITION % BY Wt. C Mn Si S P Cr Mo Fe MIN 0.15 0.5 - - - 0.5 - MAX 0.25 1.0 0.5 0.03 0.03 1.5 1.0 TYPICAL 0.2 0.6 0.3 0.02 0.02 0.7 0.04 Bal. WELD METAL HARDNESS (ALL WELD METAL) TYPICAL HARDNESS VALUES USING 150 ° C PRE-HEAT ON MILD STEEL 1 st Layer 2 nd Layer 3 rd Layer Vickers HV 210 250 265 Rockwell HRC 22 23 25 Oil quenched from 900 º C : HV 350 Tempered at 650 ºC : HV 220 Heat input, cooling rate, and dilution will affect hardness in the first two layers but no significant affect in next layers WELDING AMPERAGE AC or DC+ Ø (mm) 2.6 3.2 4.0 5 MIN 60 90 140 190 MAX 90 140 180 240 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 DS109 HV-250 Rev. 2, Date 01.01.2011


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