Ed, Mag,
I just can confirm that once the load/strain line deviates from straight (YM change) you are probably at 0.1% or less elongation.
this was the reason why we decided to use the SS curve up to 50% of the SMYS to calculate the YM.
In our case 50% of SMYS is about 225Mpa that correspond...
Just one more detail about the sample direction and its influence on the YM:
samples were machined form fabricated pipes in longitudinal and transversal direction.
Pipe was SAW, it means that:
1)we start with a laminated plate (defined direction of lamination=longitudinal respect to pipe axis...
Dear all,
Thanks a lot for your valuable contribution.
Just some clarification because I understand that I was not very self-explanatory:
1) I am talking about C-Mn steel, Grade X65, the one used for pipeline construction (API 5L or similar)
2) The YM that I refer to was calculated cutting...
Thanks MagBen,
what do you exactly mean for yield point? 0.5% strain? (absolute strain)
Analyzing more than 400 tensile test (ASTM A370) with this method I get an average YM of about 190Gpa with a stdev of 15Gpa. Pretty below the theoretical value of 207Gpa. How is it possible?
Dear all,
Could somebody tell me how was calculated/defined the "standard' value of 207Gpa as Yong Modulus of the steel.
In other words, if I have the stress strain curve as a results of a tensile test (ASTM A370) on a steel sample, then:
1) which part of the curve do I have to consider to...
