Re: Re: [MW:7217] use of E 7018 Electrode for stuructural welding without proper drying and holding

Hi

If you use vacuum baked electrodes E 7018which are available in market
which does not require baking /. you can use in open condition for 4
hrs at least.


Muthu Barathi P

Sr Manager QA/ QC
AFCONS
On Mon, 27 Sep 2010 13:02:59 +0530 wrote
>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 wrote:
>

>From: asad azmi
>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 usedto provideaddtional 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 wrote:
>





Hi,
Please find below the comments on your quiery.

what will be the effect in Mechanical/chemical proerties of deposited
weld metal ofE7018 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

>
>--- On Sun, 9/26/10, asad azmi wrote:
>


>From: asad azmi
>Subject: [MW:7196] use of E 7018 Electrode for stuructural welding
without proper drying and holding

>To: materials-welding@googlegroups.com
>Date: Sunday, September 26, 2010, 11:08 AM
>
>





Dear All,

Goodday.


what will be the effect in Mechanical/chemical proerties of deposited
weld metal ofE7018 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.

BestRegards

Asad Azmi




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Dear Sir,





Thanking You,

Honesty is the best Policy

With Warm Regards,

P Muthu Barathi
Mobile No:09967300544

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