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I have not used this filler metal for 347 tube material but it appears to be designed for the H Grade stainless steels and to avoid HAZ cracking in thickness >12mm for 347. I probably would not consider it for 347 because of the rather broad chemistry range versus a more matching filler metal (347).

Yes, we have used E347 and ER347 to weld 347H tube material in our boilers for tube to tube butt welds with no issues. There is no H grade AWS filler metal specification for 347 because the increased carbon for the H grade would adversely effect weld metal performance.

Are you sure about internal weld build-up or are you really asking about internal wastage repair using an external weld build-up? In general terms with no specific information, yes. I would use NBIC Part 3 only because I am partial to the NBIC.[smile]

Final acceptance of the plate with surface pits is up to the Purchaser if it meets SA-20. In your situation, if the surface pits are round bottom in shape and shallow, and the remaining plate thickness as measured from base of the deepest pits is above the minimum thickness required, you can...

Please read the applicable Notes in Appendix A Table A-3 in B31.1 for A 351.

Because of the different product forms and processing. If you review ASME Section II Part D you will see the allowable stresses can vary by specific product form.

If you go to the Outokumpu web site the 304L under Prodec 304L is where the suffix P was added. The attached is a pdf on the material. It is self explanatory... https://secure.outokumpu.com/steelfinder/GradeDataSheetv3PDF.aspx?OKGrade=4307&Category=Prodec Is Moly permitted in 304L? For A/SA...

The difference boils down to the work reduction ratio between the two product forms. In some applications you can have strand cast bars with little work reduction needed. In other cases you have bars made from billets that are typically produced from ingots so you can have more work reduction.

I have not seen this material used in PV fabrication for Code Case or otherwise. Why would you even consider this specification with all other material specification choices available?

Monel 400 is a solid solution strengthened alloy and does not age harden. It is supplied cold worked/stress relieved or annealed.

It refers to Defense Federal Acquisition Regulation Supplement clause for special metals. Look it up.

The term you are looking for is called fretting wear.

You can send samples of the cracked material to a metallurgical lab well outside of your geographic location. This is done routinely. If your internal lab is not capable of performing this type of analysis, you should seek an outside, independent opinion.

I would suggest you send this to a competent metallurgical lab for proper analysis to determine if the cracks are from machining or other processing steps. Otherwise, your wasting your time guessing or assuming.

Normalized versus quenched are two different heat treatment operations related to cooling rates to achieve a desired microstructure or strength level in a steel. The resulting microstructures from cooling by either normalizing or quenching may not necessarily be the same depending on microalloy...

The only advantage for your application is that testing at such a low temperature (-60 deg C) and meeting the minimum CVN requirement at this low temperature will ensure you meet the minimum CVN requirements at 0 deg C.

Only for welded tube-to-tubesheet joints.

For new installation or re-tubing. The mock-up demonstrates the rolling procedure provides adequate pull out strength.

Yes, as I understand your question, can you remove the CS flange and sinter the ceramic coating on the body (UNS08330)? When this step is completed, re-attach the CS flange.

I would not even consider the above option because of cost and fabrication concerns. This is why they have cladding and overlays.