I would assume that some forum members work at inspection agencies or manufacturers' QC department... Everybody comes in contact with bad certificates sometimes, right?
Hi,
Part of my job is to review material certificates, be it CMTR's, MTR's, EN10204 3.1's, 3.2's, etc. Me and my colleagues know plenty of horror stories about fraudulent certificates, but getting an actual copy of the faulty paperwork is difficult. A search online didn't result in much.
My...
RMC 2410 states that only straight probes are allowed for UT of thicknesses over 60 mm. A colleague of mine is convinced that this implicates the plates have to be scanned from both surfaces, because of the dead zone of straight probes. It's impossible for me to change his mind: i believe this...
RMC 2410 states that only straight probes are allowed for UT of thicknesses over 60 mm. A colleague of mine is convinced that this implicates the plates have to be scanned from both surfaces, because of the dead zone of straight probes. It's impossible for me to change his mind: i believe this...
XL83NL, that's the thing: hot forging happens at a temperature above the recrystallization temperature, so earlier heat treatments have no effect. In fact, heat treatment has to be performed again after the forging process. As far as I know, chemical analysis is the only "relevant" test in this...
Hehe, I tried to generalise/simplify the situation, but that's not working.
I'm a NoBo, I have in my possession a 3.1 certificate without mechanical values, but wíth SA336M reference. Now for this situation, I can imagine mech. values are less important, as it will be reforged. I'm not sure...
From my (limited) experience, it is more guesswork than calculating, those torque values. With all the different coëfficiënts in the equation...
Secondly, applying a tension is possible, but takes special (expensive) equipment and a LOT more time than applying torque. But I've seen it being done...
Thanks, XL83NL, that's the answer I'm looking for, but I'd like to know what it is based on. Does EN10204 have "interpretations"?
Imagine this:
I order a bloom in SA336M, but I state in my order that only chemical analysis interests me and no mechanical testing needs to be performed. Reason is...
I remember something about the friction coefficient to take into account to calculate the required torque, depending on whether or not there is a washer in between. Can't remember the formula tho, or even the norm/standard...
So it could just be a design/calculation requirement.
Hi,
I did review EN10204, but it's exactly this sentence that I find unclear:
Especially the "and/or" at the end. Is it either the product specification, OR the order (even if the order specifies less tests than the spec.)? Or is it: all tests required by the product specification, AND...
Thanks for the quick reply!
The forging was bought to be an SA336M. What I don't know, is the additional purchase specifications. There's a confusing "and/or" in EN10204; is it possible that the order or additional specs state that only chemical tests should be performed? Ofcourse that's...
Hi,
I have a supplier delivering a rough forging with a 3.1 certificate. However, only chemical analysis has been performed; for mechanical values the certificate only mentions the min/max values.
EN10204 isn't 100% clear on what is obligatory to include in a 3.1. Is this supplier allowed to...
