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Re: [MW:11684] Re: E7018-A1 Electrod

By Materials & Welding
In low alloy steel electrode classification, letters denote the weld metal chemistry
for example 7018-A1
                  8018-B2
                  9018-B3
A1---- weld metal chemistry is 0.5Mo
B2---                                  is 1.5 Cr+ 0.5Mo
B3-                                     is 2.25Cr+ 1Mo
 
if ur assembly goes PWHT, it is always better to 0.5Mo rod to compensate tensile and Creep
other wise u can very well use 7018/7018-1
pandithan 

2011/7/10 pravean ashok <gujulapravean@gmail.com>
Dear sir
 
The difference between E7018 it contains iron powderd content
 E7018-a1 refers to  chemical composition in asme sec II part c search E-7018-A1 & read out notes point you get the answer of this
only the thing writeen in standatd A-Z refers only chemical composition of electrode
 
pravean
QA/QC welding inspector
ksa
jubail  

2011/7/5 R. Moseley <robert.moseley40@yahoo.com>
Zakaria,
The "A1" designation is for the addition of Chrome moly to the
normally full carbon steel filler metal mixture. It is normally used
for welding/ joining of P3 (Carbon .5Mo materials). In this case it
would not be wise or advisable (as the client has dictated) to use a
filler metal without the addition of the Moly. Hope this helps.

Robert Moseley
Welding Specialist/ Consultant


On Jul 5, 10:11 am, Zakaria ghrab <zakaria.gh...@gmail.com> wrote:
> Hi All,
>
>   In our boiler project we have to weld socket tube A210 Gr A1,  38 mm
> diameter , 4 mm thick  to collector P11 material thick , according client
> WPS we have to weld by E7015-A1.
>
> What's the difference between EXXXX and EXXXX-A1
> May E7018 substitue E7015-A1 ?
>
> Kind regards
>
> --
> *زكرياء غراب
> **GHRAB Zakaria** *
> مسؤول عن الجودة
> QA/QC SENAD
> مشروع المحطة الحرارية ـ الوحدة الرابعة
> المحمدية ـ المغرب

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