Standards DIN8555 G 21-GF-UM-50-CG

Characteristics DURA OKs 448 ELK-Ni is a tubular rod containing fused tungsten carbides
in a nickel base matrix alloy. This alloy is especially designed for electrical
welding. The weld metal is composed of 60 to 65 % fused tungsten
carbides which are embedded in a matrix alloy containing 35 to 40 % NiSiB. DURA OKs 448 ELK-Ni excels by producing a smooth, clean surface. The alloy flows extremely well, due to the low melting point of between
900 and 1000°C.
The nickel based matrix alloy provides excellent resistance to acids and
other corrosive media. DURA OKs 448 ELK-Ni is used for applications which
are subject to extremely strong abrasive wear and corrosive media at the
same time.

Typical applications

Hardfacing equipment parts made of ferritic and austenitic steels, e.g.
mixer blades, milling plates, conveyor worms, stabilizer blades, slurry
pump valves, molding sand preparation plants , corrosion resistant
hardfacings on parts which are subject to strong abrasive wear, e.g. in the chemical industry and the food industry.

for best welding

Thoroughly clean the welding zone. It should be exempt from grease,
scale, corrosion, and similar contamination. Preheat the work piece to 300 - 500° C. During the welding process the local base material temperature has to be increased to 650°C, however, overheating should be avoided.
Adjust the torch to a slight acetylene excess so you can weld with a
double flame cone.

Mechanical properties
of all-weld metal
( typical values )

Hardness of fused tungsten carbide

> 2300

Hardness of matrix alloy HRc
ca. 45

Weld metal analysis (typical, wt. %) NiSiB
ca. 37
ca. 63
Current =+/~, 50V

Welding positions PA,PB

  Dia./Length mm
4.0 x 350
5.0 x 350
6.0 x 350

Amperage (A)


Statements on composition and application are just for the applier.s information. Statements on mechanical properties always refer to the all-weld-metal according to valid standards. DURAWELD may change the characteristics of its products without notice. We recommend the applier to check our products for their special application autonomously.