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  • Users: JLAU
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  1. JLAU

    Question on A606 steel

    Hi, Check out this link: http://www.centralsteelservice.com/faqs.html Best Regards JLAU
  2. JLAU

    316L welded to Alloy 20 (20Cb-3)

    Hi, Normally you would choose ER320LR for welding the 20Cb-3 due to the cupper content. However, as 316 is not alloyed with Cupper, there is no reason to choose a filler with Cupper in the composition. It would be better to choose a filler with as few alloying elements as poosible without...
  3. JLAU

    Electro-slag Overlays in Pressure Vessels

    Hi Bill.B, I have never heard of electro-slag to be used for weld overlay, but the bidder may have experience in this field and should be able to enlighten you. However, I would think that the high heat input often used with electro-slag welding will cause a high degree of blending between the...
  4. JLAU

    Pipe fabricated with ends milled for horizontal deviation

    Hi Freddy73, various piping codes have rules for calculating mitered bends such as yours, e.g. ASME B31.3. Try checking the code for your piping for the formula to calculate the mitered bend. If the calculation proves the bend to be unsafe, you should instead use a preformed bend of 11 deg...
  5. JLAU

    Increase flow rate in closed loop water system

    Hi Zipp, installing an open circulating tank may give you severe corrosion problems as air will be introduced into your water. But you also need an expansion tank to get rid of any entrapped air in the system. Properly designed you can use this to control your suction pressure in the system. I...
  6. JLAU

    Cast bronze - ZQAl-9

    Hi there, is someone familiar with a bronze named ZQAl-9? In hope of a positive answer, JLAU
  7. JLAU

    high yield corrosion resistant steel

    Hi, I would suggest a Duplex steel such as 2205. JLAU
  8. JLAU

    bolting aluminum to mild steel

    Hi, SS316 and aluminium work very well together without galvanic corrosion. I would use e.g. a NBR rubber gasket to part both flanges and use SS316 fasteners without any coating. Best of luck JLAU
  9. JLAU

    fresh water generator and corrosion

    When installing a fresh water generator of the evaporator type you would install also a hardening filter on the output line of the generator. The line between generator and hardening filter must be in a corrosion resistant material e.g. CuproNickel or SS316 type stainless steel. The water...
  10. JLAU

    When should you preheat?

    Second the input re hydrogen cracking. However, fatigue as mentioned could also be a problem. Hence, post weld stress relieving would help minimize the stresses in the weld, which together with a high-quality weld will improve the fatigue strength. JLAU
  11. JLAU

    stainless steel welding

    To Sinchai, I trust you have checked that the 430 is passivated compared with the 420J2??? The base material (420) is oxidised next to the weld. This oxide layer impairs the corrosive resistivity and needs to be removed, either mechanically by grinding or by acid cleaning. There are some very...
  12. JLAU

    Corrosion at welds

    It is known that smoke deposits next to welds in C-Mn steels interfere with the adhesion of the primer coat if not properly removed, eg by acid cleaning or abrasively. Can anyone give me hints/links to literature about this?

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