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NHF-260B (rutile)
NHF-260B (rutile)
AWS Specification: NONE
JIS Specification:

DF2A-260-R

Other Specification:

DIN El-250

I. APPLICATIONS:

Hard surfacing of gears, shafts and wheels.

II. DESCRIPTION:

 

NHF-260B is a titania type electrode which is designed to put prime importance on good usability and good machining property. It is suitable for reclaiming the light worn-out parts. Quenching after machining is also possible.

III. NOTES ON WELDING:

 

  • Preheating is unnecessary in general. But in the case of build-up welding of large cast steel and low alloy steel, need to preheat at 150-200ºC.

  • The groove repairing is prone to slag inclusion so adjust the holding angle of the electrode.

  • Dry the electrodes at 80-120ºC for 30-60 minutes before use.

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

  

C

Si

Mn

Cr

0.11

0.37

0.66

2.2

V. HARDNESS OF WELD METAL:

  

Welding Condition

Vickers

(Hv)

Rockwell

(HRC)

Shore

(Hs)

As Welded

Continuous Welding

220-260

16-24

32-37

Preheating

-Interpass Temp. 150ºC

245-285

21-28

36-41

After Hardening

850ºC Water Cooling

390-450

40-45

54-60

VI. WELDING POSITIONS: FLAT, OVERHEAD, HORIZONTAL

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

 

Size

Dia.

3.2

4.0

5.0

6.0

(mm)

Length

350

400

400

450

Current Range

90-130

120-180

170-230

210-280

 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.