Dear Gents,
I've been trying to understand the welding metallurgy of stainless steels. I'm working mainly with 321 material(347Si filler) and one particular problem with this can be KLA. I've understood that during re-heats of an existing joint the Niobium carbide / Titanium carbide can...
Hello everyone,
I need to qualify a PQR acc. to AWS D1.6 on TP321 base metal. In existing PQRs of my current employer i see that similar tests were made on test coupons that were not back gouged or purged whitch means that "sugaring" occurs and every destructive test( tensile, bend, macro...
Hello all,
Product: Flue Gas Silencer
Design code : Not specified but PQR must be acc. AWS D1.6
Base Material : A240-TP321H
Design temp. : not specified but considering the base metal I'd say between 500 C - 800 C
Question : I'm having trouble chooting a filler metal for this type of steel. My...
Hello friends,
Can anyone help me with an interpretation for API 6A's 7.3.4.6 regarding Impact testing for welding procedure qualification. I am particulary interested in the first statement as this is vague when im translating it in my native language and it is not clear when you have to...
I currently use a welder qualification for S355J2H, BW, thickness 25mm (1"),Ø 298,5, SMAW.Can i use this qualification for a FW, Ø60, thickness of 10mm and the same material quality? If i understand correctly from ASME IX Table QW-452.6 regarding Filler Qualification by Groove-Weld Tests all...
Hello everyone,
I have to write a welding tehnology for some parts that must be guaranteed at -60(-76 F). To give you some information, there will be both butt welds and fillet welds and the thickness will range between 10-20 mm( 0.39" - 0.78"). I usually weld this type of material(PNo.1)...
Hello everyone,
As per API 6A, hardness testing on 100% of all accessible pressure-containing, nonpressure-containing and repair welds shall be performed after all machining operations or it should be tested only when the customer requiers it?
Thank you
