Nikko Steel Kawat Las Elektroda For Hardfacing and Resurfacing - Build up SMC-39

Brosur & Katalog Produk / Brosur & Katalog Produk

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1. MANUFACTURERS OF A DIVERSE RANGE OF ADVANCED WELDING CONSUMABLES SECTION 9 SMC-39 LOW HYDROGEN - HARD FACING ELECTRODE DEPOSITING A NOMINAL 5Cr-1Mo-1.5 Si WELD METAL WITH A UNIQUE COMBINATION OF ABRASION AND HEAT RESISTING PROPERTIES DATA SHEET NO. 129 SPECIFICATION CLASSIFICATION - PRODUCT DESCRIPTION The design emphasis of the chemically basic flux is engineered to ensure that the weld metal hardness levels demanded by the specification are fully met without detracting from the toughness levels associated with this class of alloy. The basic flux containing the appropriate alloying elements and a balanced addition of iron powder is extruded onto a high purity ferritic core wire using 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 may be used in all positions except vertical down. Arc stability is good as is slag detachability. Weld seams are smooth, evenly rippled and slightly convex in shape. The metal recovery of the electrode is some 120% with respect to weight of the core wire. The higher than normal silicon promotes weld metal fluidity allowing precise build up of edges. APPLICATIONS AND MATERIALS TO BE WELDED On high carbon steels HV-250B should be used as a buffer layer. The weld deposit has good resistance to abrasion, under normal circumstances is crack free, and will withstand a reasonable amount of impact loading. Used to particular advantage for: Bulldozer blades, crusher jaws, bucket lips and teeth involved in earth moving and mineral crushing. Where the main wear is abrasion, but with some impact resulting from rocks and compacted minerals. Under normal circumstances the weld metal is non-machinable. The high Cr and Si levels increase resistance to oxidation at elevated temperatures giving advantages over conventional martensitic types. WELD METAL ANALYSIS COMPOSITION % BY Wt. C Mn Si S P Cr Mo Fe MIN - 1.0 0.5 - - 3.0 0.7 MAX 1.0 2.0 1.5 0.03 0.03 8.0 1.1 TYPICAL 0.5 1.4 1.0 0.02 0.02 7.0 1.0 Bal. WELD METAL HARDNESS (ALL WELD METAL) AS WELDED 150 0 C PRE-HEAT HRC HV 1 st Layer 55 600 2 nd Layer 59 690 3 rd Layer 59 690 Pre-heat and dilution may lower hardness on 1 st two layers but not on subsequent layers. WELDING AMPERAGE AC or DC+ Ø (mm) 2.6 3.2 4.0 5.0 MIN 65 90 140 190 MAX 90 130 180 240 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 DS129 SMC-39, Rev. 1, Date 01.06.2010


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