Thank you metengr for your time, and I'm sorry that I have been unable to present my question in a clearer way, but in this unique situation was hoping to learn of someone's personal experience with sucess (or failure) in presenting an unassigned material as "similar" to an assigned material...
Like you, metengr, I was leaning towards qualifying additional welders, and may still opt to do so if necessary, but my primary goal with this post is to learn how ASME defines "similar" as it is used in QW-423.1 because I have been unable to locate any interpretations or personal experience...
I qualified a WPS for it, but would like to be able to use existing welders if I can define "similar" to know if welders who are qualified to P-4x materials can work on the job (within all required essential variables of course), since QW-423.1 permits that.
Good suggestion, but this particular material is a NiCr (ASTM B670) and is not listed in B2.1. Do you have any personal experience in how to "similar" the chemical composition has to be in order for me to be able to consider it "similar" to an assigned metal?
ASME QW-423.1 permits welder qualifications to extend to unassigned base metals of similar chemical composition to base metals that have P-numbers. Does anyone have any experience in how "similar" a base metal's chemical composition has to be?
Marking will be done upon receipt of the stainless materials in our warehouse and prior to fabrication, so the heat should not be an issue. I'm hoping to either confirm or contradict a statement made to me that SHARPIE markers cause cracks in stainless.
JoeTank: While I don't have ASME-III in my library, I'll see what I can find; thanks for the suggestion.
weldtek: The standard I'm writing will apply to ASME work (since AWS already addresses undersized fillets). And while my Code calcs usually do provide the min weld size required, they...
According to the foreword in ASME Section VIII, "the Code does not fully address tolerances. When dimensions, sizes, or other parameters are not specified with tolerances, the values of these parameters are considered nominal and allowable tolerances or local variances may be considered...
Thank for responding; so far, we're on the same page. Do you have any reference data that would indicate how big a role preheat and interpass temps have in heat input? While WPSs require preheat mins and interpass maximums, neither preheat nor interpass is a part of the arc energy heat input...
In calculating heat input (amps x volts x 60/IPM) on a weld, I'm interested in getting opinions on how much impact preheat and interpass temps have vs. the heat input itself as calculated by the traditional formula shown. None of the technical papers I've found incorporate anything but the four...
Does anyone have extensive experience qualifying WPSs using 2205 to NAVSEA Tech Pub 248 para 4.7.5(f)? Specifically I'm interested in the requirement (if any) to MAINTAIN interpass temperature (vs. ensuring that WPS interpass max is not exceeded).
Looking for recommendations on filler metal for welding 317L stainless to SA516-70 for a 650 deg F application. Typically use 309 for carbon to stainless joints, but would like to make sure that this particular dissimilar joint doesn't pose any additional issues.
Does para 5.2.3.1 allow me to hire welders who were trained with a program under another activity's program? We would establish qualification per 5.2.3, but am interested in any interpretations regarding the training requirement.
