I am not familiar with API, so I have to ask why would hardness testing be required for I625 cladding? In my experience 625 is deposited for corrosion resistance not for wear resistance.
How are you seeing lack of fusion in the cap when performing a root bend? Your description and picture are in conflict of each other. If the lack of fusion is in carbon steel side of the root as it appears in your picture (root bend or side bend), it appears there is missmatch at the lands. I...
In my opionion, altering filler metal types with in the same F-number grouping is the same as altering base metals of the same P number and expecting the the final product to meet all design requirements. As others have stated, the WPS is not the only document that needs to be complied with.
I think we got off topic. To answer your initial question which I think has already been done is: Aluminum and some of its alloying elements are more reactive with the envirnoment/ atmosphere on a molecular or atomic level than steel especially when heated to melting temp.
As far as your...
I agree your cleaning is sufficent however, I would consider trying denatured alcohol or use only acetone. Also, I see no info regarding joint design. Are we talking open root grooves, fillets, seal welds, in plate or pipe? What is the material thickness 1/16" or 1" or ...? This all plays a role...
Good Day,
I have a project to design a multi piece, circular, aluminum track in which a piece of equipment (approx 50lbs) will travel on. The current material is a 6xxx series aluminum that is tempered but uncoated. Manufacturing shop has told me they would like more wear resistance built in to...
I have used a very small tapered carbide burr with a pneumatic pencil grinder for removing material/ slag in hard to reach areas. Pick up a Dremel at the local hardware store.
Ron reccomended GMAW process but listed SMAW electrodes. For GMAW use solid wire, no larger than .035" diameter, preferably .023". 100% agron shielding gas or 75/25 mix with CO2.
How long/ diameter are the welds?
GTAW process is widely known to cause distortion. If you are set on using GTAW start trying pulse. Based on the info above, I do not see any reason GMAW or SMAW would not work here. Either process should produce less distortion.
What is the history behind limiting heat input to 60kJ/in the welding of stainless steel (TP 304) to prevent sensitization/ maintain corrosion resistance in the as welded condition? Is it related to grain growth or ferrite?
Thank you in advance.
I have witnessed 100% penetraion of a root pass with 1/8" land, no gap on 304 in 2G position using STT. It appeared thicker than 1/8" would have been possible. Wall thickness was over 1". Most of the STT parameters I have seen were in synergic mode using a tri mix shielding gas.
The answer to whether or not to use filler will be dictated by the Welding Procedure Specification (WPS)that will be used on that joint. The WPS should be selected based on customer requirements and any national standards (ASME, API, AMS, AWS, MIL, etc...) you will be welding to and/or any NDE...
Perhaps a solidification/ fusion line?. By stating "no crack indications were found" did you perform visual inspection or dye penetrant inspection? If the coupon passes mechanical testing, the weld is most likely sound. Lastly, you could attempt a side bend then dye check the cross section of...
