[MW:13404] Re: 13384] Welding SS 310S With E NiCrMo3

Dear Sir,

Thanks for your valuable information.

Impact test is supplimentary essetnail variable. Please give your
views on in this following conditins.

1. Impact test is not mandatory as per 31.3 for stainless steels till
105 C. But if MDMT - 100C and impact is required at MDMT for each
material as per Cleint specification. In that situation will it be
essential variable or not.

2. In the above situation if qualify PQR as per Sec. IX, impact is
non essentail variable, but if i have to qualify as per cleint, then
it is suppplimentary variable.

3. Impact as supplientary variable depends on MDMT or applicable
only when practicaly if we conduct impact test irrespective of temp.

Please clarify.

REgards

Venkat

On 1/2/12, pgoswami <pgoswami@quickclic.net> wrote:
> Hi Venkat,
>
> You may weld SS310 , with EMiCrMo-3 electrodes. Although overmatching with
> respect to chemical analysis and mechanical properties, this electrode will
> not cause any problem. However making use of the existing PQR on UNS 31254
> material to weld SS 310 would not be possible under the following
> circumstances:-
>
> * if there is any supplemental essential variable (e.g notch
> toughness), due to the fact that UNS 31254 is P8 Gr 4 material and SS 310 is
> P8Gr2 material. Group no is a supplemental essential variable, a new PQR is
> required under such conditions.
>
> If the service application is for offshore or other corrosive environments,
> then a new PQR shall be established using matching electrode, e.g E/ER-310
> to match the weld corrosion resistance as the base metal or as required by
> technical specifications.
>
> Thanks.
>
>
> Pradip Goswami,P.Eng.IWE
> Welding & Metallurgical Specialist & Consultant
> Ontario,Canada.
> Email-pgoswami@sympatico.ca,
> pgoswami@quickclic.net
>
> -----Original Message-----
> From: materials-welding@googlegroups.com [
> <mailto:materials-welding@googlegroups.com>
> mailto:materials-welding@googlegroups.com] On Behalf Of N VENKATESWARA
> PRASAD
> Sent: Monday, January 02, 2012 10:36 AM
> To: materials-welding
> Subject: [MW:13384] Welding SS 310S With E NiCrMo3
>
> Dear All,
>
> Can we use E NiCrMo3 for welding of SS 310. What are the pros and cons.
>
> We have PQR for ASTM E312 S31254 material welded with ENiCrMo3. Can we use
> this PQR for the support of above welding procedure as per ASME Sec. IX.
>
> Regards
>
> VENKAT
>
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>

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