Pravin,Here's some update from Sec-II, Pt-C and Sec-IX on "G" class welding filler metals. In addition to the answers provided below this information will help you to understand the rationale behind "G" type welding consumables.Note,ER-70S-G does not differ much with respect to mechanical properties as compared to respect on the filler grades in SFA -5.18.As explained below "G" class is specific application base consumable, where the composition, properties are as agreed between the supplier and the purchaser. However if the consumable falls within the A No range of QW-442, consumable manufacturer may assign the A No to the product(As John Henning had mentioned in his response).Thanks.Pradip Goswami, P.Eng,IWEWelding & Metallurgical SpecialistOntario, CanadaA2.3 "G" Classification:- A2.3.1
This specification includes filler metals classified as ER70S-G [ER48S-G], E70C-G [E48C-G], and E70C-GS [E48C-GS]. The "G" (multiple pass) or "GS" (single pass) indicates that the filler metal is of a "general" classification. It is general because not all of the particular requirements specified for each of the other classifications are specified for this classification. The intent in establishing these classifications is to provide a means by which filler metals that differ in one respect or another (chemical composition, for example) from all other classifications (meaning that the composition of the filler metal, in the case of the example, does not meet the composition specified for any of the classifications in the specification) can still be classified according to the specification.The purpose is to allow a useful filler metal—ne that otherwise would have to await a revision of the specification —to be classified immediately under the existing specification. This means, then, that two filler metals, each bearing the same "G" classification, may be quite different in some particular respect (chemical composition, again, for example).
ASME Sec-IX
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of george.dilintas@gr.bureauveritas.com
Sent: Saturday, November 29, 2014 3:19 PM
To: materials-welding@googlegroups.com
Subject: Re: [MW:22422] G type consumableThe A-number is not assigned. It is determined on the basis of the actual chemical composition of the weld metal.
For certain processes (GMAW, SAW, ....) a chemical analysis of the weld metal is required.
best regards
Dr. Georgios Dilintas
Authorized Nuclear Inspector
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(See attached file: Dilintas_George.vcf)John Henning ---28/11/2014 19:16:59---A -G consumable does not meet any particular ASME/AWS SFA/A-5.x classification chemistry. This does
From: John Henning <jhenning@deltak.com>
To: "materials-welding@googlegroups.com" <materials-welding@googlegroups.com>
Date: 28/11/2014 19:16
Subject: Re: [MW:22400] G type consumable
Sent by: materials-welding@googlegroups.com
A -G consumable does not meet any particular ASME/AWS SFA/A-5.x classification chemistry. This does not mean that it will not meet a Section IX A-Number chemistry range. You would need to evaluate the filler metal manufacturer's specified chemistry range to see if it fits one of the A-number chemistry ranges. Alternatively, you can specificy that the filler metal must meet a certain range. While not a G filler metal, I typically specify that ER70S-6 must meet the A-Number 1 chemistry requirements.
From: materials-welding@googlegroups.com <materials-welding@googlegroups.com> on behalf of Pravin Poornachandran <htcispravin@gmail.com>
Sent: Friday, November 28, 2014 5:58 AM
To: materials-welding@googlegroups.com
Subject: [MW:22396] G type consumable
Dear expert,
Is it true that all G type consumable example ER70S-G don't have A number under ASME?
This group only have F number? Is it true?
Kindly advice.--
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