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  1. BWmatleng

    Experience with nickel overlay on stainless steel

    I appreciate the quick responses! You both confirmed my thought that 622 wouldn't help in erosion since it is designed for corrosion protection. My company is currently having trouble bending tubes of this combination TP304H with 622 cladding. Since bends with 622 have been successfully made in...
  2. BWmatleng

    Experience with nickel overlay on stainless steel

    Has anyone ever used a nickel alloy on a stainless steel base tube? I am being told by the business folks in my company that "all the utilities" are asking for TP304H tubing with 622 overlay. The reason it is being requested is that the 622 offers erosion protection for the sections...
  3. BWmatleng

    Not acheiving the expected hardness for T23 regardless of cooling rate

    Metengr; Thank you for the lead on Boron. We are going to look at that next. When I passed your information on to Hainsworth, he asked who posted the information. I sat in the ASME Section II Committee meeting in Boston and Vancouver this year and have probably met you.
  4. BWmatleng

    Not acheiving the expected hardness for T23 regardless of cooling rate

    Yes, I work for B&W in Barberton. I mention Benteler because we received a sample of T23 tubing from them. It was the last sample described above. This isn't my project, by the way, I was looking for any information that I could pass along to the engineer that is working on the issue. It isn't...
  5. BWmatleng

    Not acheiving the expected hardness for T23 regardless of cooling rate

    I have been using the curves from V&M to determine the expected hardness and microstructure. If we can't come up with a reasonable theory for the differences, we are probably going to send the question to Benteler or V&M for input.
  6. BWmatleng

    Not acheiving the expected hardness for T23 regardless of cooling rate

    I have a T23 tube with a reported analysis of: carbon 0.07 (ASTM required 0.04 - 0.10) manganese 0.45 (0.10 - 0.60) silicon 0.32 (0.50 max) nickel 0.11 (not listed) chromium 2.08 (1.90 - 2.60) tungsten 1.61 (1.45 - 1.75) molybdenum 0.12 (0.05 - 0.30) copper 0.15 (not listed) titanium...

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