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Recent content by adaz27

  1. adaz27

    ASTM A335 P36 to 316 Stainless Steel

    We have a requirement for welding ASTM A335 P36 to 316/316L Stainless Steel I believe the ideal procedure would be to butter the P36 with ErNiCr-3 and PWHT, then join to the 316/316L after using ErNiCr-3 again.. However, I've heard of people welding dissimilar joints involving Carbon steel...
  2. adaz27

    duplex PQR failed tensiles

    I agree that examination of the microstructure will shed some light on whats went wrong. I've sent the test pieces to the lab, waiting on the results. metengr, apologies for the badly worded question. I did not mean what could the micro prove in terms of the microstructure but what possible...
  3. adaz27

    duplex PQR failed tensiles

    The calculations on the report check out OK. There is no evidence of embrittlement in the weld, HAZ or Parent as the hardness values are well below the max requirement. 22Cr: 238-302 HV10 / 25Cr: 258-309 HV10 The material for the 22Cr & 25Cr was sourced from different mills so the chance of...
  4. adaz27

    duplex PQR failed tensiles

    I've ran 2 PQR tests on duplex stainless steels. 1 X PQR on 22%Cr duplex UNS S31803 - 76mm OD X 19.1mm THK machined from forged bar 1 X PQR on 25%Cr super duplex UNS S32760 - 76mm OD X 19.1mm THK machined from forged bar GTAW, 98Ar 2N shield & purge Both PQRs have failed on tensiles in the...
  5. adaz27

    PWHT temperature range

    I need to use two seperate PQR's for the welding on a P1 Low temp CS product. PWHT is req. due to the thickness. Impacts req. due to material. PQR 1 has a pwht range of 625 - 635 PQR 2 has a pwht range of 600 - 620 As impacts are required QW407.2 states that a change in PWHT temperature and...
  6. adaz27

    Hard-facing Overlay PQR ASME

    I've read QW-453 just unsure about it's interpretation when the test is run on bar, which doesn't really have a nominal wall thickness. 20mm DIA bar matches the dimensions required for the production piece that we are to qualify for. I just want to know what range thickness the PQR will qualify...
  7. adaz27

    Hard-facing Overlay PQR ASME

    I'm running a new ASME PQR test, hard-facing overlay on to stainless steel bar If my PQR test piece is 20mm Dia bar. What is the base metal thickness qualified? Also what is the Weld metal thickness qualified if weld metal thickness = 3mm?
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