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NIHONWELD N-9018-B3
AWS Specification: E9018-B3
JIS Specification:

DT2418

Other Specification:

KS ET2418

 I. APPLICATIONS:

 

N-9018-B3 is used in piping steels (A335-P22), boiler and heat excharger steel tubes (A199-T22, A200-T22, A213-T22), rolled steels (A387-D), cast steels (A217-WC) and forged steels (A182-F22, 336-F22).

II. DESCRIPTIONS:

N-9018-B3 is an all position, iron powder-low hydrogen electrode developed for welding 2.25% Cr-1% Mo steel which is subjected to elevated temperatures such as those found in the power piping and boiler industries. This electrode has extremely high deposition efficiency, producing X-ray quality weld deposits with mechanical properties that meet or exceed AWS-ASTM requirements. N-9018-B3 electrodes yield a stable arc with low spatter. AC or DC (reverse polarity) may be used.

III. NOTES ON USAGE

  • Dry the electrodes at 325-375ºC for about one hour before use.

  • Preheat at 200-350ºC and postheat at 680-730ºC.

  • Adopt back step method or strike the arc on a small steel plate prepared for this particular purpose to prevent blowholes at the arc starting.

  • Keep the arc as short as possible. 

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

 

C

Si

Mn

P

S

Cr

Mo

0.08

0.50

0.77

0.014

0.011

2.25

1.02

 V. TYPICAL MECHANICAL PROPERTIES OF ALL WELD METAL DEPOSIT (stressed-relieved):

 

Yield Point

N/mm2 (Ksi)

Tensile Strength

N/mm2 (Ksi)

Elongation

%

Charpy 2 V-Notch

at 24 ºC, J (ft lbs)

PWHT

 

680 (99)

 

750 (109)

 

21

 

115 (85)

 

690ºC x 1 hr

VI. WELDING POSITION: ALL POSITIONS

VII. SIZE & RECOMMENDED CURRENT RANGE: AC OR DC (+)

 

DIAMETER (mm)

2.6

3.2

4.0

5.0

LENGTH (mm)

350

350

400

400

 

CURRENT

A

 

F

 

55-85

 

90-130

 

135-185

 

190-250

 

V, OH

 

50-80

 

80-120

 

110-170

 

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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. 

 

 

 

 

 

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