SHIELD METAL ARC WELDING (SMAW)

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NHF-30CRS

Specification
AWS Specification: N/A
JIS Specification: DFCrA-700B
Other Specification: N/A
Description
  • NHF-30CRS is a low hydrogen hardsurfacing electrode with deposition rate of 190%
  • Suited for parts subjected to heavy abrasion and metal-to-metal wear with moderate impact
  • Easy to weld in horizontal-vertical positions
  • Excellent weld deposit properties at temperature not exceeding 450ºC

 

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

C

Si

Mn

Cr

Nb

 

6.04

1.50

0.85

23.00

6.81

 

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

Value

670 - 760

59 - 63

 

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

DIAMETER (mm)

3.2

4.0

5.0

 6.0

LENGTH (mm)

350

400

400

 450

Current Amp

90 - 130

120 - 180

170 - 230

 210 - 280

Welding Positions: FLAT, FILLET, VERTICAL UP, HORIZONTAL, 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.

  • Crusher parts
  • Refractory press screws
  • Cement press screws
  • Palmanut press screws
  • Coconut press screws
  • Pre-heat at 150ºC and over in general
  • In case of multi-layer build-up welding and welding mother plates with hardening property, under-lay with low hydrogen type electrodes for mild steel
  • ? Dry the electrodes at 300-350ºC for 30-60 minutes before use
  • Clean weld area properly before welding
  • Oscillation of the electrode with an amplitude up to 3-4 times the nominal diameter results in very regular and smooth beads
  • The full properties of the alloy is obtainable in two layer deposits

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