Que hàn cường độ cao NIHONWELD N-7024

I. APPLICATIONS:

N-7024 is used in the fabrication of structural steel, girders, beams, tanks and vehicles giving long run out welds for increased productivity compared to conventional rutile electrodes.

II. DESCRIPTIONS:

N-7024 is a rutile coated high recovery manual metal arc electrode for the high speed welding of mild and medium tensile steels. The electrode is manufactured using a heavy coating containing a large proportion of iron powder giving a nominal efficiency of 160%. The electrode has a rapid melt-off rate and is suited to high productivity applications.

N-7024 exhibits excellent welding operability with little spatter and trouble free strike and re-strike characteristics. The electrode is suitable for use in the flat position for butt welds and in the gravity and horizontal-vertical positions for fillet welds. The 3.2mm diameter electrode can be used for butt welds in the horizontal position. N-7024 used with the electrode in contact with the workpiece (touch welding) producing a mitre finish bead shape when fillet welding, with excellent weld toe blending. The electrode is manufactured using a non-conductive flux coating enabling welding operations to be performed in confined areas without the risk of side arcing effects. The slag is self lifting in the majority of applications. Suitable for use with both AC (minimum OCV 50V) and DC +)

III. NOTES ON USAGE:

·         Adjust the welding current to keep the proper slag covering, because optimum welding current is subject to the welding process and the surface condition of steel plate.

·         In the case of horizontal fillet welding, keep the optimum speed ratio among 1.0 – 1.5.

·         Dry the electrodes at 70 – 100ºC for 30 – 60 minutes before use, because excessive moisture absorption causes undercut and irregular beads.

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

V. TYPICAL MECHANICAL PROPERTIES OF WELD METAL:

VI.WELDING POSITIONS: HORIZONTAL AND FLAT

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

 APPROVALS: ABS, BV, DNV, LRS