1- Gas Purity 2- Large Root openning 3- Contaminant Filler Metal(Clean with Aceton) 4- Large distance between workpiece and torch nozzle 5- Wrong angle of welder's hand 6- Cold metal 7-Contaminant metal
--- On Sun, 8/8/10, kannayeram gnanapandithan <kgpandithan@gmail.com> wrote:
From: kannayeram gnanapandithan <kgpandithan@gmail.com>
Subject: Re: [MW:6377] Porosity in Aluminium welding Reg.,
To: materials-welding@googlegroups.com
Date: Sunday, August 8, 2010, 7:27 AM
check gas purity for moisture, it should be less than 4ppm. Use water cooled torch to avoid overheating otherwise arc will produce hydrogen which in turn porosity kgp
On Fri, Aug 6, 2010 at 9:09 AM, kcrtechnical <kcrtechnical@gmail.com> wrote: Dear All, What are all the probable reasons for getting porosity in aluminium welding, other than weather conditions, here both material and filler are 99.7% Pure Aluminium. Please share with any type of reason. K C R --
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