Recent content by W1987

The type of joint is double bevel side with back gouging (arc air + grinding), the angle of bevel varies from 50 to 60 degrees and the root opening varies from 3 to 4 mm. The materiales thickness is 20 mm, it is a low alloy steel welding with ER110S-G, preheat is 120°C, welding positions are 2G...

Hello everyone, I have a question about GMAW short-circuit. This process was selected for some out-of-position joints, and it is not possible to use another process or change the transfer mode. We have encountered lack of fusion in these field welds. I believe that increasing the joint angle...

Hi, Could someone please call me and explain the objective of using fillet welds to reinforce PJP or CJP welds? I read that they help prevent stress concentration and increase fatigue strength, but why? I think that this is because stress is better distributed. Also, could you recommend a...

Thank you all for your responses; now it is clear to me. Thanks, gtaw.

Ok, thank you for your time

Thanks, R6155, Yes, but Table 4.3 does not allow undermatched filler metal for complete joint penetration groove welds in tension applications. So, is it possible to use undermatched filler metal for these applications when your design allows design stresses below the minimum specified...

Thank you for your response. r6155, I undestand the stament i'm asme ix qw-153. But in AWS D1.1. for me it is no clear. But if you can use undermatching filler metal, what it is the acceptance criteria for tensile test? EdStainless, Im talking about specification minimum strength.

Hi Everybody, I have a question regarding the use of undermatching filler metal in the qualification of welding procedures under AWS D1.1. I understand that it is permissible to use undermatching filler metal if the engineer agrees to it or if it is acceptable for the application. However...

Thank you for your anwers. I was thinking that one approach could be to perform non-destructive metallography to determine the approximate width of the HAZ.

Hi everybody, I have a question. Thank you for your time. We need to remove a complete weld on a shell that belongs to a pressure vessel. The removal will be performed by grinding. We will remove both the weld metal and the heat-affected zone (HAZ). Here’s the question: the HAZ on austenitic...

Hi Ed, thanks for your response once again. We will try to use a different gas mixture, either Ar or Ar-N2. We opted for a gas mixture that contained oxygen to achieve a GMAW spray transfer. The weld metal has a ferrite content ranging between 5-10%. The chemical composition of the weld...

Hi everybody, I would like to hear your opinion on the influence of thickness in welding and why it's so important. I know that it can affect the cooling rate, for example in carbon steels and low alloy steels. When the thickness is increased, it's more probable that welding generates harder...

Hi Ed, Thank you for your response. Yes, this is annealed material with a thickness of 20 mm. The welds are clean with some minor discolorations. Could you please explain why discolorations are important? "Based on my experience, surface discolorations should not be a major issue and can be...

Hello everybody, I have some questions regarding Nitronic 50 welding. I conducted some tests using the GMAW and SMAW process with ER209 as the recommended filler metal for welding Nitronic 50 to achieve similar mechanical properties. However, the impact properties of the weld metal are low...