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AWS Specification:	Est
JIS Specification:	DFC Fe
Other Specification:	DIN EFeB2

I. APPLICATIONS:

For repairing of cast iron parts where machining is unnecessary.

II. DESCRIPTION:

NC-25 is a graphite type electrode using mild steel core rod. Its weld metal shows high carbon content. Then it results high hardness, so it is suitable for welding the parts where machining is unnecessary. Its fusibility with case iron is excellent.

III. NOTES ON USAGE:

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.

IV. TYPICAL CHEMICAL COMPOSITION OF WELD METAL (%)

 

C	Mn	Si	Fe
0.92	0.36	0.11	Bal

V. TYPICAL MECHANICAL PROPERTIES OF WELD METAL:

 

Tensile Strength N/mm2 (ksi)	Elongation %	Hardness HV (HRC)
497 (72)	22	350-390 (35-40)

VI. WELDING POSITIONS: FLAT, FILLET, VERTICAL UP, HORIZONTAL, OVERHEAD  

VII. SIZES AVAILABLE AND RECOMMENDED CURRENTS (AC or DC + ):

 

Size (mm)	Dia.	3.2	4.0	5.0
	Length	350	350	350
Current Range Amp		90~120	110~150	140~180

 

 TEST RESULT

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.