Welding SS 310S With E NiCrMo3

[N VENKATESWARA PRASAD]

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

[pgoswami]

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-p...@sympatico.ca,
pgos...@quickclic.net

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From: material...@googlegroups.com [mailto:material...@googlegroups.com] On Behalf Of N VENKATESWARA PRASAD

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[vaibhav Joshi]

Dear,

You can not use this procedure. Pno for SS310 is different. More over basically this both materials are of different grade which has different metallurgy.qualify and find a procedure accordingly.

Regards,

VJ

[Aron Luke]

Dear Mr. Venkat ,

It cannot be used for SS310 as they are of different grouping, moreover ErNiCrMo3 is for 6Moly steels.

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Best Regard's,

Aron Luke G

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[N VENKATESWARA PRASAD]

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 <pgos...@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

[Deepika Nayak]

Dear Groups,

Please suggest whether inconel 625 overlay requirement necessarily meet the chemical composition of Inconel 625 at the surface or only the major element need to match the requirement.

Regards,

[vaibhav Joshi]

Dear,

Please check undiluted weld metal chemical requirement for ENiCrM0-3 electrodes in ASME sec-IIC .

Regards,

VJ

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