SHIELD METAL ARC WELDING (SMAW)

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NHF-6700 (Low Hydrogen)

Specification
AWS Specification: N/A
JIS Specification: N/A
Other Specification: DIN 8555: E6-60
Description
  • NHF-6700 is used for hardfacing workpieces exposed to abrasion accompanied by impact stressing
  • Excellent weldability in the horizontal possition
  • Good slag removal and smooth seams
TYPICAL CHEMICAL COMPOSITION OF ALL WELD METAL DEPOSITS (%):

C

Si

Mn

Cr

0.50

1.0

0.40

9.00

 

HARDNESS OF WELD METAL:
Hardness
Vickers (Hv)
Rockwell (HRC)

Value

640 - 690


56 - 58

SIZE AND RECOMMENDED CURRENT RANGE: AC, DC (+)

DIAMETER (mm)

3.2

4.0

5.0

LENGTH (mm)

350

350

350

Current Amp

100 - 140

140 - 180

180 - 210

Welding Positions: FLAT, HORIZONTAL, VERTICAL
Approvals: N/A

NOTE:

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.

  • Can be used for base metals that are steel, cast steel, or hard manganese steel
  • Die blocks
  • Pressing
  • Drawing and cold pressing tools
  • Excavator parts
  • Shear blades
  • Slideways
  • Guide rails
  • Electrode can be used for single and multi-pass hardfacings
  • In multi-pass welding, it is advisable to deposit interpasses with NHF-CrMn or NHF-630
  • The full hardness is then attained in the third pass
  • For hardfacing on low alloy steels, preheating to 250-300 degrees C is recommended
  • Cooling after welding should proceed slowly in an oven or under insulation
  • If peak hardness is 60 HrC is to be obtained, hardening is accomplished by quenching in oil at 1,050 degrees C.
  • If machining is necessary, softening must be induced by annealing for 5 hours at 800 degrees C

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