Flux Cored Welding Wires
Welding Engineers NZ Ltd supply a wide range of flux cored wires (FCW) and are the sole authorised NZ agent for Kobelco, Nippon (NSSW) and Chosun flux cored welding wires.
If welding with a solid MIG wire works, why change to a higher priced flux-cored wire?
The flux in the core of FCWs combine a number of ingredients which are specific for the welding application or performance enhancement each wire is designed for.
Common flux ingredients include slag formers to shield the weld pool and shape and support the weld, powdered alloys to form low-alloy deposits or improve the mechanical properties, scavengers and fluxing agents to clean up impurities on the weld metal. Iron powder is used to increase deposition rates and the flux of metal cored wires is almost entirely iron powder.
For most welding applications like vertical-up welding, flat welding, welding over galvanised, or welding hard-to-weld steels, a correctly selected FCW can do it better and faster than a solid wire.
One of the reasons that Kobelco and Nippon FCW are better than other brands is they use their own ‘A’ grade green bar steel as the base metal. This means the best grade of steel and they have the ability to add fluxing agents to the steel itself during manufacture of the green bar, in addition to the agents in the flux core, which allows greater specificity for targeted performance.
As with most products, there is a variation of quality and performance across wires and brands, ask to trial and choose wisely.
Optimising the efficiency of the welding job by choosing the best quality FCW you can will pay off in the overall cost of the job:
Faster, more efficient, better quality welding will decrease the largest cost component of your work – Labour.