NHF-6700 (Low Hydrogen)

Specification

AWS Specification: N/A
JIS Specification: N/A
Other Specification: DIN 8555: E6-60

Description

Application

Remarks

  • 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
  • Technical Data

    TYPICAL CHEMICAL COMPOSITION OF ALL WELD METAL DEPOSITS (%):

    C

    Si

    Mn

    Cr

    0.50

    2.30

    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.