ESAB's Dual Shield Prime is a family of seamless, low-hydrogen (H4) non-copper-coated flux cored wires that combat moisture absorption in humid environments, delivering impact toughness down to -60degC. Tests performed in accordance with AWS standards show an initial level of 2.17ml of diffusible hydrogen per 100g of deposited weld metal; after 1 week of exposure with a 90 per cent RH at 30degC, Dual Shield Prime demonstrated just 2.35ml of diffusible hydrogen.
Neil Farrow, Global Product Manager, Flux Cored Wires, ESAB says: "We laser seal the seams, so there's no chance of Dual Shield Prime picking up moisture. Even after extended storage and exposure, these H4 wires retain their low hydrogen properties. Where procedures allow, Dual Shield Prime's low diffusible hydrogen may eliminate or reduce preheat requirements."
Dual Shield Prime wires are especially suited for high-tensile steels and applications that require low-temperature impact toughness, notably in the ship, offshore, oil/gas and processing industries. All carry ABS approval, with additional approval by product, including BV approval, for the 81Ni1 H4 grades.
Users at naval shipyards and construction engineering companies report that Dual Shield Prime produces a very soft arc with almost spatter-free welds and easy slag removal, an important consideration in multi-pass applications. With a spray-type transfer, operators can easily manipulate and control the weld puddle, enjoy good wetting with tie-in at the toes of the weld and achieve good penetration.
Dual Shield Prime is a non-copper-coated wire. As a result, there are no copper flakes to contaminate wire feeders, liners, torches and contact tips with copper particles. The result is trouble free feeding, high process stability, reduced consumption of wear parts and superior welding properties. Combined with lower diffusible hydrogen, these properties add up to increased productivity, lower welding costs and higher quality welds.
ESAB offers Dual Shield Prime in four different compositions and diameters of 1.2 to 1.6mm:
For more information about Dual Shield Prime products please visit www.esab.co.uk.