5.0mm x 5kg Nikko Hard Facing HV-600B Electrodes

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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. 

Applications & 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.


Diameter : 5.0mm

length : 400mm

Weight : 5kg

Recommended currents : AC & DCEP

Recommended Amp : 160-200


Weld Metal Analysis Composition % by Weight

  C Mn Si S P Cr Mo Fe
Min 0.3 0.5 - - - 4.0 -  
Max 1.0 1.5 1.0 0.03 0.03 7.0 1.0  
Typical 0.5 1.2 0.5 0.02 0.02 4.5 0.7 Bal.

Weld Metal Hardness (All Weld Metal)

As Welded 150°C Pre-Heat HRC HV
1st Layer 50 520
2nd Layer 55 600
3rd Layer 58 660

Pre-heat and dilution may lower hardness on 1st two layers but not on subsequent layers.

Welding Amperage AC or DC+

  2.6mm 3.2mm 4.0mm 5.0mm
MIN 65 90 140 190
MAX 90 130 180 240

Other Data
Electrodes that have become damp should be re-dried at 150°C for 1 hour

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Part Number
JIS Z 3251 DF2B-600-R
Rod Size