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NHF-670
AWS Specification: NONE
JIS Specification:
Other Specification:

DIN 8555: E 6-UM-60

I. APPLICATIONS:

NHF-670 is a high-efficiency electrode for hardfacing workpieces of steel, cast steel or high Mn-steel, subject to simultaneous wear by impact, compression and abrasion. Due to its recovery, this electrode is ideally suited for for economic one-layer applications. Typical applications are crane wheels, rollers, chain links, sprocket wheels, gliding surfaces, screw conveyors, beaters, edge runners, guide wheels, baffle plates etc.

II. NOTES ON USAGE:

Hold electrode as vertically as possible and keep a short arc. Preheating is generally not necessary. For multipass applications it is advisable to weld cushion layers with NHF-300 and to apply NHF-670 for the last 3 layers. Preheating temperature of high Mn-steels should not exceed 250°C, if necessary intermediate cooling or welding in a water bath. Electrodes that have got damp should be redried for 2 h/300°C.

III. TYPICAL CHEMICAL COMPOSITION OF WELD METAL (%):

 

C

Si

Mn

Cr

Mo

V

Fe

0.40

1.00

1.00

9.50

0.60

1.5

Bal.

IV. HARDNESS OF WELD METAL: 58 HRC

V. WELDING POSITIONS: FLAT, HORIZONTAL VERTICAL, VERTICAL UP, HORIZONTALL

VI. SIZES AVAILABLE AND RECOMMENDED CURRENTS (AC or DC+ ):

 

Size

Dia.

3.2

4.0

5.0

(mm)

Length

350

350

350

Current Range

90-120

130-160

170-210

 TEST RESULT

The information contained or otherwise referenced herein is presented only as “typical” without guarantee or warranty, and Industrial Welding Corporation expressly disclaims any liability incurred from any reliance thereon. Typical data and Test results for mechanical properties, deposit or electrode composition and other properties were obtained from a weld produced and tested according to prescribed standards, and should not be assumed to be the expected results in a particular application or weldment. Actual results will vary depending on many factors, including, but not limited to, weld procedure, plate chemistry and temperature, weldment design and fabrication methods. Users are cautioned to confirm by qualification testing, or other appropriate means, the suitability of any welding consumable and procedure before use in the intended application.