NHF-7200

Specification
AWS Specification: AWS A5.13 EFeMn-A
JIS Specification: N/A
Other Specification: DIN 8555: E7-UM-250-KP
Description
  • NHF-7200 is predominantly suited for tough and crack resistant joinings and surfacings on parts of high Mn-steel subject to extreme impact, compression, and shock
  • High Mn-content produces a fully austenitic deposit
  • Weld metal deposit is highly workhardening and hardens during service from originally 200-250 HB to 450 HB
  • Machining is possible with tungstene carbide tools
     
TYPICAL CHEMICAL COMPOSITION OF ALL WELD METAL DEPOSITS (%):

C

Si

Mn

Cr

Mo Ni

0.70

0.27

13.00

4.50

0.53 4.00

 

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

As Welded

220 - 260

95 - 100

Work Hardened 420 - 450 43 - 45

 

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

DIAMETER (mm)

3.2

4.0

5.0

LENGTH (mm)

350

450

450

Current Amp

110 - 140

150 - 180

180 - 210


Welding Positions: FLAT, VERTICAL UP, OVERHEAD
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.

  • Building industry
  • Quarries and mines for surfacing worn high Mn steel parts, such as excavator pins, buckets and teeth, mill hammers, crusher jaws, cones and beaters, impeller bars, railway building machinery, shunts, heart and cross pieces
  • Hold electrode as vertically as possible
  • Welding should be done at low temperature
  • Interpass temperature should not exceed 250 C
  • Recommend to weld short beads and to allow for continuous cooling during welding or to place the workpiece in a cold water bath with only the welding area sticking out of the water

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Industrial Welding Corporation (IWC) was established in 1982 by Mr. H. Ong Hai who had 25 years of welding industry experience (at that time). Since then, IWC has consistently and successfully earned an excellent ...
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