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NIHONWELD N-Cu 39
AWS Specification: ECu
JIS Specification:

DCu

Other Specification:

DC Only

I. APPLICATIONS:

The pure copper electrode NCU 39 is suitable for joining and surfacing all commercial pure copper grades according to DIN 1787 such as

Material No.

OF-Cu           2.0040

SE-Cu           2.0070

SW-Cu          2.0076

SF-Cu            2.0090

     II. DESCRIPTION:

N-CU 39 yields as poreless, well deoxidized crack-proof weld metal. Its corrosion resistance is equal to that of the best commercial copper grades.

     III. NOTES ON USAGE:

Clean welding zone thoroughly. Preheating of copper to 400 – 600o C depending on the wall thickness, and keep temperature during welding. Keep the arc short with steep (vertical up) electrode guidance. Choose the biggest possible diameter of the electrode. Apply only dry electrodes. Rebaking for 2-3 h at 150o C.

IV. TYPICAL CHEMICAL COMPOSITION OF WELD METAL (%):

 

Cu

Si

Sn

P

Mn

Others

98.00 min

0.50 max

1.00 max

0.15 max

0.50 max

0.50 max

IV. TYPICAL MECHANICAL PROPERTIES OF WELD METAL:

 

Tensile Strength

N/mm2 (ksi)

Elongation

%

Hardness

HB

200 (29)

29

50 - 55

V. WELDING POSITIONS: FLAT, VERTICAL UP, HORIZONTAL, OVERHEAD

VI. SIZES AVAILABLE AND RECOMMENDED CURRENTS: DC (+)

 

Size

(mm)

Dia.

3.2

4.0

5.0

Length

350

350

350

Current Range Amp

80~130

130~180

180~230

 

 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.