１．Difference between NSSW’s SFW　　　　　　　　　and conventional fold type FCW

Comparison to conventional flux cored wire （FCW）

Superiority of Seamless Flux Cored Wires (NSSW’s SFW)

Steel sheath

Flux

Copper plating

NSSW’s SFW

❶ Copper plated surface

❷ No seam (opening) in outer layer

Conventional fold type FCW

：Seam （Opening）

２．Superiority of NSSW’s SFW to conventional fold type

Conventional fold type FCWNSSW’s SFW（Copper coating）

NSSW’s SFW is coated by Copper to prevent rust

Customers can used by easy storage for a long time.

❶ Excellent rust prevention

❷ Excellent hygroscopic resistance

Diff

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Fold type FCW

NSSWSeamless

3 months laterafter unpacking

0

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5.3

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NSSWSF-1

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Just afterProduction

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Exposing time hr

Conventional fold type

Seamless type

0.20

0.10

0 5 10 15 20 25 30

Atmospheric conditions30℃‒80％RH

Less Tip abrasion & life of tip is longer

Best Choice for Automatic Welding

Conditions Seamless Flux Cored Wires Conventional fold type

Continuous welding10min × 10times

（Accumulating total 100min）Wire dia.： 1.2mm

Welding current ：270A

Abrasion amount of top of the tip 0.13mm 0.45mm* （Circumscribed circle of tip hole after welding） − （Diameter of the tip hole before welding）

　When NSSW’s SFW is used, the life of tip is about 3.5 times as long as the case where conventional fold type is used. （When NSSW’s SFW is used, abrasion of tip is about 1/3.5.）

The reason the long life of tip is as follows：a）The surface of NSSW’s SFW is plated with copper, and, therefore, friction is small.b）Cross-sectional shape of NSSW’s SFW is point symmetry. Therefore, the wire is fed out straight.

❸ Excellent tip abrasion resistance

❹ Targeting point is extremely stable

Wire Targetability test

Y-axis

X-axis

Extension：150mm

Contact Tip

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m)

X-axis (mm)X-axis (mm)

NSSW's SFW Conventional fold type

Extension:150mm

1506（Y）

３．Difference between NSSW’s SFW and other Seamless FCW

❶ Production process

Superiority of NSSW’s SFW to other Seamless FCW

Strip

DrawingWelding

Roll forming Flux filling Seam welding

Copper platingSpooling Dehydrogenation& annealingDrawing

Drawing DrawingCoiling

Pipe Dehydrogenation& annealing

CopperPlating SpoolingFlux Filling

(Vibration)

Vibration

NSSW's SFW Other Seamless FCW

Composition of fluxTop of Wire ＝ bottom of Wire

Composition of fluxTop of Wire ≠ bottom of WireHeavy particles are often at the bottom of Wire

Once, although we had produced Seamless FCW by this vibration method, we developed stable flux-filling method for higher quality FCW 20 years ago.

a） NSSW’s SFW filled with flux homogeneously

b) Other Seamless FCW filled with flux by vibration from top to bottom.

《Homogeneous of the composition of flax》