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 -- To post to this group, send email to materials-welding@googlegroups.com To unsubscribe from this group, send email to materials-welding-unsubscribe@googlegroups.com For more options, visit this group's bolg at http://materials-welding.blogspot.com/ The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.
-- To post to this group, send email to materials-welding@googlegroups.com To unsubscribe from this group, send email to materials-welding-unsubscribe@googlegroups.com For more options, visit this group's bolg at http://materials-welding.blogspot.com/The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.
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