CO2 makes the arc easier, but it's not advisable for SS, in souch case my advice is : AR 0.69 + He 0.30 +O 0.1
Best Regards
Subject: RE: Re: [MW:8641] Weld method
Date: Fri, 10 Dec 2010 06:23:51 +0300
From: pjacelajado@npc.com.sa
To: materials-welding@googlegroups.com
Hello to everyone.
I like to add that using CO2 mixed with a little Argon will reduce the weld spatter in GMAW.
Thanks.
PJA
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of PREM SHANKARDUTT NAUTIYAL
Sent: Thursday, December 09, 2010 2:21 PM
To: materials-welding@googlegroups.com
Subject: Re: Re: [MW:8636] Weld method
Hi
I have an opposite experience with what Mr.Karthik has mentioned in the trailing email.
GMAW produces lot of spatter and frequently welder has to change contact tips. LOF, silica inclusions defects are more.
FCAW produces very less spatter, good bead profile, better control and lesser defects. In fact we have achieved 100% RT/UT welds with FCAW. With FCAW you can weld with higher current densities, thus achieve more productivity than GMAW.
However cost of welding consumables of FCAW/kg is more than GMAW.
Regards
Prem Nautiyal
On Thu, 09 Dec 2010 14:36:10 +0530 wrote
>Hi,
When compared to FCAW and MIG, MIG is better than FCAW.
because GMAW can give excellent results. The finished weld has no slag and
almost no spatter. If the material you're welding is dirty, rusty, or
painted, you must clean it properly by grinding until you get shiny surface/bare metal. GMAW successfully with common commercial metals —
low-carbon steel, low-alloy steel, stainless steel, and aluminum.
better for root pass.
FCAW - more welding operator/welder control required,proper selection of electrode diameter related to thickness etc.,,if welder is not capable- poor bead,more spatter,incomplete penetration and FCAW mostly suits for thicker materials.some times can with thinner material with lesser dia of electrode.
but finishing/quality GMAW is better than FCAW.
Thanks & Regards,
(Karthik)
Karthikeyan.S QA/QC Manager Getabec
Energy Co.,Ltd. 379,Moo6,Soi8,Nikhomphatana, Rayong-21180, Thailand. Phone: 0066 38 897035-8 (Off) Fax: 0066 38 897034 Hand Phone: 0066 892512282
--- On Thu, 12/9/10, ashok pawar wrote:
From: ashok pawar
Subject: [MW:8626] Weld
method
To: materials-welding@googlegroups.com
Date: Thursday, December 9, 2010, 3:22 PM
Which welding is economical and qualitative, FCAW or MIG !
Regards,
Pawar A.R
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