Re: [MW:31389] RE: 31380] E-7018-1 is better then E7018

Hi Mr. Goswami,

Please can you throw some Light on the Manganese content of E7018 & E 7018-1 as AWS 5.1 restricts Manganese to 1.6% and what will happen if increased beyond this range.

Thanks & Regards

J.Gerald Jayakumar

On Thursday, 3 September, 2020, 03:06:21 am GMT+7, <pgoswami@rogers.com> wrote:

Hi Ghulam,

E 7018-1  electrodes contains more Mn than E-7018 electrode, at the same strength(UTS) level, 70 Ksi. The advantage is better impact . Typically E-7018-1 are designed for impact up to -46 Deg c , while the same for E-7018 is up to -29 Deg C.

In order to avoid duplicity or redundant work nowadays  it's very commons for electrode manufacturers to classify same welding electrode as E-7018-1/E-7018, which is called dual certification.

Please look at the highlighted text from, SFA 5.1 , Sec-II, Pt-C, on E-7018-1 welding electrodes.

As the mechanical and other properties of the deposited are not changed, a change from E-7018 to E-7018-1 , will not cause any harm the welds . However if should be addressed in WPS or regularized through an NCR.

 

Thanks

 

Pradip Goswami, P.Eng, IWE Consultant-Welding-Metallurgical Engineering
Cell & Whatsapp-905-9793232. Personal:pgoswami@rogers.com

 

From: materials-welding@googlegroups.com <materials-welding@googlegroups.com> On Behalf Of Ghulam Mustafa
Sent: September 2, 2020 1:06 AM
To: Materials & Welding <materials-welding@googlegroups.com>
Subject: [MW:31380] E-7018-1 is better then E7018

 

Dear All,

Hope you are fine.

i want discuss that i was gone yesterday for inspection in other company as a third party, i checked WPS for welding inspection, during inspection i observed that welder used E7018-1 Electrode instead of E7018 on structure. structure material A572 Grade-B and A-36. E7018-1 can problem or not?

can any one tell me about this problem.

 

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