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This. I've seen some PQR's where the hardness doesn't match the mentioned base material. Makes me question the entire PQR. This is how I organize them: If clients requires grain size / FN / hardness and yield strength for aluminium / corrosion testing / ... I include the reports in the PQR...

Attached the definitions under ISO.

IR guns are notoriously unreliable, especially on the higher temperatures and on reflective surfaces like stainless steels. Here, I'd suggest contact probes. Great idea, use a real life case like this instead of some generic tool box meeting template for training.

I don't see any advice above leading you to use E(R) NiCrMo-3 for the entire weld. I also wouldn't be in favor of this, as I mentioned above. And, again, you don't need a qualified welder to advise you how to proceed, but rather someone with a metallurgical background. Someone that might ask...

Will the welding be performed under your supervision/responsibility, or will a contractor be doing it, and you just want to verify his procedure? Is that for the Ni, the 309 or the carbon steel? You have three distinct phases in the welding. It's important to be specific in all three, and if...

Regarding the Ni-based filler, check the website of the Nickel Design Institute. Lots of very informative, and practical useful info there. All fillers will have low carbon. The problem is the carbon (and other alloying elements) in the base metal, that might cause problems. The alternatives...

Not too sure about the filler metal. A PQR only says so much. Nothing about the fitness for purpose (corrosion resistance, working temperature and creep resistance, ...). Other than that, no remarks about the working procedure. No problem transitioning to 309 and CS, as Ed says. Be careful about...

Why cut & weld if you can simply bend the beam? And a CJP weld (if done correctly) is always as strong as the profile itself.

If A < 20%, the formula should be used (no matter the alloy). Note: the formula is incorrect, it should be A in the denominator. BTW, good luck bending welded titanium... Can't say for sure for gr. 51, but we've had quite some difficulties with Ti-Al-V alloy.

What is cruciform hardness? Have been doing PQR's for almost 20 yrs now, never heard that. Do you mean regular hardness tests (ISO 9015-1) on a cruciform test specimen? Shouldn't be a problem, values will be lower than a regular T joint due to higher heat. I'd prefer a micro + grain size test on...

The EN/ISO steel fabrication standards give for (almost) each alloy the max. CE. Carbon steel that is, not stainless steel! As there is a range for each alloying element, there's also going to be a range for CE. Lower limit isn't of much use, so they only give the max. value.

Depens on the welding process that will be used and the desired penetration. A 45° prep is usually to small. Try to have "beta" between 50 and 55°. My interpretation of the weld designation is 1/4" flat "in" the vertical part, and a fillet weld following on the first weld with a leg length of...

On the positive side, you won't have to worry about rock candy embrittlement, something that is rather common when dealing with older structures...

What is the application? (structural welding on 50 ksi yield steel, or street furniture) What are the requirements of the welded connections? (similar/identical corrosion resistance and appearance after welding, paint/HDG afterwards, ...) What is the required throat thickness? sl or ml welds...

... as long as the normative description is identical.

Just for future reference, the Eteka 5 Spezial is a coated electrode by Goldschmidt (known mostly for their thermite welds), and has a 13%Mn and 0.9%Cr alloy content.

it's not the "e" that is 5/6. But I agree, the (safety) margin should be higher.

Why would LPI be desirable from construction point of view? I'd start with the materials first. Ofcourse, for Chromium-alloyed steel, you're correct. But we're talking standard containers here. If Standard austenitic stainless steel, LPI would be a waste of time. If low carbon steel and...

Thanks for the publication! Under § 5.1.1, they do mention hardfacing (which is typically very different from a 307 alloy!). Using a Etecta 5 Spezial filler metal, in Germany... I didn't find anything, but I've forwarded this question to one of my contacts at voestalpine, one of the major German...

For light rail (metro, tramways, ...) in cities, in tight curves the top of the rail is sometimes welded with a 307 filler material (austenitic, work-hardenable layer with 18-8-6 Cr-Ni-Mn chemistry). The goal of this layer is (supposed to be) the mitigation of noise due to the wheel slip. It is...