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NHF-300 (low hydro)
AWS Specification: NONE
JIS Specification:

DF2A-300B

Other Specification:

DIN E1-300

I. APPLICATIONS:

Hard surfacing of various wheels, cast steel rollers and bulldozer’s parts

II. DESCRIPTION:

NHF-300 is a lime type electrode which has stable hardness and toughness. It is suitable for intermetallic abrasion and medium impact abrasion. Machining is possible in general. Its hardness increases by quenching after machining.

III. NOTES ON USAGE:

  • Preheating is unnecessary in general. But it is more safe to preheat at 150ºC and over, if large weldments are required to surfacing.

  • In the case of high cooling rate, preheat or postheat to avoid difficulty of machining caused by hardening..

  • Dry the electrodes at 300~350ºC for 30~60 minutes before use. 

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

 

C

Si

Mn

Cr

0.08

0.48

0.80

2.16

V. HARDNESS OF WELD METAL: 30-36 HRC 

VI. WELDING POSITIONS: FLAT, FILLET, VERTICAL UP, HORIZONTAL, OVERHEAD

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

 

Size (dia. mm)

3.2

4.0

5.0

Length (mm)

350

350

350

Current Range (Amp)

90 - 130

120 - 180

170 - 230

 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.