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PA-7018-G

AWS Specification: AWS A5.5 E7018G

JIS Specification : NONE

Other Spcification: NONE

 

I. APPLICATIONS:

Welding of LPG tankers, LPG storage tanks, nuclear power plants, bridges and pipe lines in cold regions.

II. DESCRIPTIONS:

N-7018G is a low hydrogen iron powder type electrode for 50kg/mm² class high tensile steel and Al-killed steel used in temperature up to – 46ºC

• Excellent mechanical properties.

• Good notch toughness in low temperature.

• X-ray performance and mechanical usability are good.

III. NOTES ON USAGE:

• Dry the electrodes at 300-350ºC for one hour before use.

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

• As excessive heat-input deteriorates impact values, weld with proper heat-input selected according to the impact values required.

IV. TYPICAL CHEMICAL COMPOSITIONS OF ALL-WELD METAL DEPOSITS (%):

C	Si	Mn	P	S	Ni
0.07	0.45	1.04	0.012	0.010	0.62

V. TYPICAL MECHANICAL PROPERTIES OF WELD METAL:

Yield Strength N/mm2 (Ksi)	Tensile Strength N/mm2 (Ksi)	Elongation %	Impact Value ºC,J (ºF, Ft-Lbs)
490 (71)	560 (81)	31	-46º,120 (-51º,89)

VI. WELDING POSITIONS: ALL POSITIONS

VII. SIZES & RECOMMENDED CURRENT RANGE: AC or DC (+)

Diameter (mm)		2.5	3.2	4.0	5.0	6.0
Length (mm)		350	350	400	400	450
CurrentA	F	50-85	90-130	130-180	180-240	230-320
	V & OH	50-80	80-115	110-160	130-180	-

 

 

 

•  philarc-pa-7018-g .pdf