Hi, If you use E7018,then you have to do Proper baking regardless of material except A514 and A517 while you use E7018M and E70XXH4R as per AWS D1.1. 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 Mon, 9/27/10, asad azmi <azmiasadayub@gmail.com> wrote:
From: asad azmi <azmiasadayub@gmail.com>
Subject: Re: [MW:7213] use of E 7018 Electrode for stuructural welding without proper drying and holding
To: materials-welding@googlegroups.com
Date: Monday, September 27, 2010, 1:43 PM
material used is not A514 OR A517. material used is of very low grade. it is welding of angle bar. also the environment will be dry. it is structural work only used to provide addtional support to a grout and wall. the use of E6010 is allowed for this joint. but because of the unavailaibilty of E6010 , the E 7018 Electrode has been used. Also i think if the electrodes E 7018 are provided in hermetically sealed containers baking is not required.
On Mon, Sep 27, 2010 at 7:09 AM, Karthik <karthik6684@yahoo.com> wrote: | Hi, Please find below the comments on your quiery. what will be the effect in Mechanical/chemical proerties of deposited weld metal of E7018 which is used for Structural welding of angle bar( material CS) without drying (at 260-430deg C) and Holinding(at 120 deg C). Can E7018 be used without proper drying and holding for stuructural welding( fillet weld only) of angle bar/supports(material CS). No. Using of Elctrodes without baking will leads to under-bead cracking. Usually whatever code that you are welding to will detail the process. API, AWS or whatever. It's the hydrogen trapped in the weld that makes the difference. Depending upon materials, the defect may not be detectable for several days. Also Pls.Find below the Extraction from AWS D1.1 for electrode restrictions on A514 and A517(if it is applicable to you) 5.3.2.5 Electrode Restrictions for ASTM A 514 or A 517 Steels. When used for welding ASTM A 514 or A 517 steels, electrodes of any classification lower than E100XX-X, except for E7018M and E70XXH4R, shall be baked at least one hour at temperatures between 700°F and 800°F [370°C and 430°C] before being used, whether furnished in hermetically sealed containers or otherwise.
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 Subject: [MW:7196] use of E 7018 Electrode for stuructural welding without proper drying and holding Date: Sunday, September 26, 2010, 11:08 AM
Dear All, Goodday. what will be the effect in Mechanical/chemical proerties of deposited weld metal of E7018 which is used for Structural welding of angle bar( material CS) without drying (at 260-430deg C) and Holinding(at 120 deg C). Can E7018 be used without proper drying and holding for stuructural welding( fillet weld only) of angle bar/supports(material CS). Thanks in advance for your valuable suggestions. Best Regards Asad Azmi | -- 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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