Chemical Composition
Chemical Composition
(OP)
I read these forums all the time, and since I now have a question I thought I would post!
As per the ASTM requirement (A961) for forged A350 LF2 Flanges can someone advise me on what variances could be expected between the chemical composition on the certificates issued by the mill, compared with results obtained by undertaking actual product analysis.
Thanks
As per the ASTM requirement (A961) for forged A350 LF2 Flanges can someone advise me on what variances could be expected between the chemical composition on the certificates issued by the mill, compared with results obtained by undertaking actual product analysis.
Thanks





RE: Chemical Composition
RE: Chemical Composition
RE: Chemical Composition
I have both the standards you mentioned.
Am I therefore correct in thinking that the results obtained through product analysis in the lab MUST therefore be the same as the mill cert after of course taking into account of the tolerances.
I.e. Mill cert Mn = 1.220. Lab test = 0.940, Tolerance = 0.040, therefore the two do not compare.
I thankyou for you help.
RE: Chemical Composition
RE: Chemical Composition
Basically we got some flanges and we have an issue where it may be that the material certs are not representative of the flanges, they originated in China.
We tested a left over sample flange and although the sample was in the spec for A350 LF2 the results are very different from that on the mill cert, thus creating more suspicion that the mill certs may not be as real as we would like to belive
RE: Chemical Composition
RE: Chemical Composition
Captainobvious,I hope you enjoy the forum for a long time as you have adopted the right approach of observing for a while and then posting ,which is the right way to go.
Learn the rules,so you know how to break them properly.
Dalai Lama
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