SHIELD METAL ARC WELDING (SMAW)

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NC-25

Specification
AWS Specification: AWS A5.15 ESt
JIS Specification: DFC Fe
Other Specification: DIN EFeB2
Description
  • NC-25 is a graphite type electrode using mild steel core rod
  • Weld metal exhibits high carbon content
  • Features high hardness
  • Suitable for welding the parts where machining is unnecessary
  • Fusibility with cast iron is excellent
TYPICAL CHEMICAL COMPOSITION OF ALL WELD METAL DEPOSITS (%):

C

Si

Mn

Fe

0.92

0.11

0.36

Bal.

 

TYPICAL MECHANICAL PROPERTIES OF ALL WELD METAL DEPOSITS:
Tensile Strength
N/mm2 (KSI)
 
Elongation
%
 
Hardness HV (HRC)
 

497 (72)

22

350 - 390 (35 - 40)

 

SIZE AND RECOMMENDED CURRENT RANGE: AC, 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, 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.

  • Repairing of cast iron parts where machining is not necessary
  • The preheat temperatures vary in accordance with kind, shape and size of base metal
  • Preheating over 200ºC is appropriate to prevent cracking
  • Slow cooling is recommended after welding

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