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NIHONWELD N-NiMo-7
AWS Specification: ENiMo-7
JIS Specification:

NONE

Other Specification:

I. APPLICATIONS:

The most common application of N-NiMo-7 would be in the chemical processing industries on parts exposed to all concentrations and temperatures of hydrochloric acid.  It is also used on parts subjected to sulphuric, phosphoric and acetic acids. NIHONWELD N-NiMo-7 should not be used in the presence of cupric or ferric salts which may develop where iron or copper bearing alloys have come in contact with acids.

     II. DESCRIPTION:

N-NiMo-7 is a nickel-molybdenum flux-coated electrode developed specifically for welding similar base metals such as Hastelloy® B-2 to itself or to steel and nickel alloys.  Common base metals that can also be welded would include ASTM B333, B335, B619, B622 AND B626 all of which have UNS number N10665.

NIHONWELD N-NiMo-7 has a controlled low level or carbon, iron and cobalt which together with nickel and molybdenum gives this electrode excellent resistance to pitting and stress corrosion cracking commonly caused by acids.

III. NOTES ON USAGE:

  • Its weldability is as same as austenitic stainless steels.

  • Keep the interlayer temperature under 100ºC and cool it as fast as possible.

  • Keep the welding current as low as possible.

  • Dry the electrodes at 150 ~ 200ºC for 30 ~ 60 minutes before use.

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

 

C

Si

Mn

Fe

Ni

Mo

Cr

W+Co

0.01

0.12

0.90

1.20

Bal.

28.00

0.90

1.90

V. TYPICAL MECHANICAL PROPERTIES OF WELD METAL:

 

Tensile Strength

N/mm2 (ksi)

Elongation

%

Hardness

757 (110)

27

98 HRB

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

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

 

Size

(mm)

Dia.

3.2

4.0

5.0

Length

350

350

350

Current Range

Flat

70~110

100~150

130~180

Amp

Vertical & OH

65~105

95~140

-

 

 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.