NHF-ST1

Specification
AWS Specification: AWS A5.13 ECoCr-C
JIS Specification: N/A
Other Specification: N/A
Description
  • NHF-ST1 is a cobalt based flux coated welding electrode
  • Has the highest hardness standard alloy in the group of cobalt alloys used for elevated temperature abrasive wear associated with corrosion
  • Deposits of this alloy have a large volume of chromium carbides that impact outstanding abrasive wear resistance
  • The addition of tungsten enhances high temperature hardness and matrix toughness for excellent adhesive and solid particle erosion wear resistance
  • Bonds well with all steels including stainless
TYPICAL CHEMICAL COMPOSITION OF ALL WELD METAL DEPOSITS (%):

C

Si

Mn

Cr

W Co

2.15

0.47

1.03

31.25

12.72 Bal

 

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

Value

520 - 620

50 - 56

 

SIZE AND RECOMMENDED CURRENT RANGE: DC (+)

DIAMETER (mm)

3.2

4.0

5.0

LENGTH (mm)

350

350

350

Current Amp

90 - 120

110 - 150

140 - 180


Welding Positions: FLAT, OVERHEAD, VERTICAL UP
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.

  • Preheat at 300C and over
  • Postheat at at 600C and slow cool after welding to prevent cracking
  • Dry electrodes at 150-200C for 30 ? 60 minutes before use
  • Valve heads
  • Seal rings of high pressure pump and crusher parts

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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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