SHIELD METAL ARC WELDING (SMAW)

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N-CuNi

Specification
AWS Specification: AWS A5.6 ECuNi
JIS Specification: N/A
Other Specification: N/A
Description
  • N-CuNi is a DC arc welding electrode that gives 70% Cu-30% Ni Cupro-Nickel deposit
  • Weld metal shows good corrosion resistant fatigue
TYPICAL CHEMICAL COMPOSITION OF ALL WELD METAL DEPOSITS (%):

Cu

Si

Mn

Fe

Ni

Bal.

0.26

1.15

0.65

30.22

 

TYPICAL MECHANICAL PROPERTIES OF ALL WELD METAL DEPOSITS:
Yield Point
N/mm2 (KSI)
 
Tensile Strength
N/mm2 (KSI)
 
Elongation
%
 

327 (47)

425 (62)

38

 

SIZE AND RECOMMENDED CURRENT RANGE: DC (+)

DIAMETER (mm)

3.2

4.0

5.0

LENGTH (mm)

350

350

350

Current Amp

Flat

70 - 110

100 - 150

130 - 180

Vertical & Overhead

65 - 105

95 - 140

-

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.

  • Welding of curpo-nickel clad steel
  • Build up welding of heat exchanges, distillers, and chemical industry equipment
  • Welding of similar and dissimilar metals, such as various copper alloys
  • Use DC (+) current
  • Preheating is not necessary and avoid continuous welding
  • Keep the interpass temperature under 100ºC
  • Arc length should be as short as possible
  • Adopt straight bead method
  • Do not use excessive current in order to prevent the dilution from base metal for build-up welding of carbon steel
  • Dry the electrodes at 200-250ºC for 30-60 minutes before use

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