Re: [MW:34607] Dissimilar welding chemical/PMI acceptance criteria

Dear Sir,

As per ASTM B474, Chemical analysis of weld shall match the chemistry of ERNiCrMo-3, in case of dilution effect manufacture and purchaser agreement is required,

Here, weld chemistry is matching the alloy 825, Is it acceptable?

Regards,

Manish Tripathi

On Tuesday, 24 October, 2023 at 9:31:36 pm UTC+5:30 Vishwas Keskar wrote:

Chemical analysis of the weld joints in not a mandatory test  in any Code  either in similar or dissimilar welds.

Some Customer specifications are imposing it .

You have to give ref of the dilution phenomenon and communicate the details to QAC 

There is dilution. So weld metal chemistry will be not exactly as per filler wire due to dilution effect .

Additional one - Chemical analysis is mandatory in case of corrosion overlays - Undiluted Chemistry at the depth   

Thanks

Vishwas- IWE

 

Sent from my iPhone

On 24-Oct-2023, at 6:42 PM, Manish Tripathi <manish.tri...@gmail.com> wrote:

Dear Experts, 

Please provide reference of CODE, for chemical analysis acceptance of dissimilar welding. Here Alloy 825 welding by ERNiCrMo-3, 

Ideally weld metal should match ERNiCrMo-3, But can we accept Alloy 825 chemistry in weld metal.

Welding Process: EFW

Design Code: ASME Sec VIII Div.1

Welded part: Pipe Long Seam ASTM B474.

Regards,

Manish Tripathi

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