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NIHONWELD N-9018-B3L
AWS Specification: AWS A5.5 E9018-B3L
JIS Specification:

NONE

Other Specification:

I. APPLICATIONS:

Welding of 2.25% Cr-1% Mo steels used for main steam pipes etc. the low carbon content of the weld metal contributes to its crack resistance and lower preheat temperature.

II. DESCRIPTION:

N-9018-B3L reduces crack sensitivity while providing outstanding notch toughness. Its specially formulated coating resists moisture pick-up, minimizing hydrogen cracking and starting porosity, and making it an excellent choice for conditions of high heat and humidity.

III. NOTES ON USAGE:

  • Dry the electrodes at 350-400°C for about one hour before use and store the electrodes at 100-150°C after drying them with attention to keep away from moisture.

  • Adopt back step method or strike the arc on a small steel plate prepared for this particular purpose, because arc striking on base metal is in danger of initiating cracking.

  • Keep the arc as short as possible

  • Preheat at 100-150°C. The temperature to be applied varies in accordance with plate thickness and kind of steel to be welded.

  • Pay attention not to exceed proper heat-input because excessive heat-input causes deterioration of impact values and yield strength of weld metal.

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

C

Si

Mn

Cr

Mo

0.04

0.50

0.77

2.25

1.02

V. TYPICAL MECHANICAL PROPERTIES OF WELD METAL:

Yield Point

N/mm2 (ksi)

Tensile Strength

N/mm2 (ksi)

Elongation

%

PWHT

680 (99)

750 (109)

21

690°C x 2 hr

VI. WELDING POSITIONS: ALL POSITIONS

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

Size

(mm)

Dia.

2.5

3.2

4.0

5.0

Length

350

350

400

400

 

Current

Flat

50-75

70~110

110~155

155~200

V & OH

30-70

55-105

90-140

 

 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.


 


 


 


 


 


 


 


 


 


 


 

 

 

 

 

 

 

 

Welding of 2.25% Cr-1% Mo steels used for main steam pipes etc. the low carbon content of the weld metal contributes to its crack resistance and lower preheat temperature.

 

Notes on usage

(1)   Dry the electrodes at 350-400°C for about one hour before use and store the electrodes at 100-150°C after drying them with attention to keep away from moisture.

(2)   Adopt back step method or strike the arc on a small steel plate prepared for this particular purpose, because arc striking on base metal is in danger of initiating cracking.

(3)   Keep the arc as short as possible

(4)   Preheat at 100-150°C. The temperature to be applied varies in accordance with plate thickness and kind of steel to be welded.

(5)   Pay attention not to exceed proper heat-input because excessive heat-input causes deterioration of impact values and yield strength of weld metal.

 

Typical Chemical Composition of Weld Metal (%):

C

Si

Mn

Cr

Mo

0.04

0.50

0.77

2.25

1.02

 

Typical Mechanical Properties of Weld Metal:

Yield Point

N/mm2 (Kgf/mm2)

Tensile Strength

N/mm2 (Ksi)

Elongation

(%)

PWHT

680 (99)

750 (109)

21

690 degrees C x 2 hr

 

Size and Recommended Current Range (AC/DC+):

Diameter (mm)

2.5

3.2

4.0

5.0

Length (mm)

350

350

400

400

Ampere

Flat

50-75

70-110

110-155

155-200

V & OH

30-70

55-105

90-140

 

 

Welding Positions:

ALL POSITIONS

 

Packing:

20 Kg corrugated box, with 4 units of 5 Kg shrinked plastic wrapped paper boxes inside.

Special requests on packing are accepted.