Nikko Steel Kawat Las Elektroda For Hardfacing and Resurfacing - Build up HV-850

Brosur & Katalog Produk / Brosur & Katalog Produk

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1. MANUFACTURERS OF A DIVERSE RANGE OF ADVANCED WELDING CONSUMABLES SECTION 9 HV-850 LIME RUTILE HARDFACING ELECTRODE DEPOSITING WELD METAL HIGH IN CHROME- CARBIDE PROVIDING EXCELLENT RESISTANCE TO ABRASION DATA SHEET NO. 118 SPECIFICATION CLASSIFICATION - PRODUCT DESCRIPTION The design emphasis of the flux is designed to ensure a slag solidification range that allows the chrome carbide particles to be evenly distributed within the austenitic alloy matric, so ensuring complete uniformity of hardness. The balanced lime rutile flux contains the appropriate alloying elements and is bound with a blend of silicates that ensures both coating strength and resistance to moisture absorption. WELDING FEATURES OF THE ELECTRODE The electrode welds with a smooth stable arc and easily strikes and re-strikes. Weld appearance is bright, almost of polished appearance, smoothly contoured and slag detachability is excellent. The metal recovery is some 170% with respect to core wire weights, thus reducing welding time. The weld deposits are non-machinable. APPLICATIONS AND MATERIALS TO BE WELDED Suitable for surfacing a wide range of steels including 13Mn types. Because thermal contractional stresses will cause stress relieving cross-cracking, build- ups should be limited to 3 layers, preferably two when restraint is high. The deposit has excellent resistance to abrasion against minerals, sand and sludges which leads to its extensive use in the earth moving, cement, dredging and steel industries. For build-ups on carbon and low alloy steels or 13Mn steel, NSB-307 should be used as a buffer layer. WELD METAL ANALYSIS COMPOSITION % BY Wt. C Mn Si Cr Mo Fe MIN 4.0 - - 30 0.5 MAX 5.0 1.5 1.0 38 1.0 TYPICAL 4.5 0.8 0.8 35 0.6 Bal. WELD METAL HARDNESS (ALL WELD METAL) AS WELDED 150 0 C PRE-HEAT HRC HV 1 st Layer 48 – 54 475 – 575 2 nd Layer 54 – 58 580 – 660 3 rd Layer 56 – 60 620 – 700 Due to the complex nature of chrome carbides micro hardness will be 1500HV. These give better abrasion resistance than martensitic alloys, eg : HV600B, which have equivalent overall hardness, but lower micro-hardness Actual hardness will be affected on base material composition, number of layers, heat input and welding conditions WELDING AMPERAGE AC or DC+ Ø (mm) 3.2 4.0 5.0 MIN 110 150 190 MAX 160 220 270 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 DS118 HV-850, Rev. 2, Date 01.01.2011


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