Hi,
I did a simulation with the same stress on stainless steel HAS-U A4 M24 and stainless steel HAS-U A4 M27. It comes out the M24 has better capacity than the M27.
I was interested to know how can it be possible ? I was expecting to have M24 with less capacity than M27.
Thanks for your question. One of the differences is the mechanical properties of the stainless steel elements above M24 due to the mechanical properties being lower for example ≤ M24: strength class 70, fuk = 700 N/mm², fyk = 450 N/mm²
For > M24: strength class 50, fuk = 500 N/mm², fyk = 210 N/mm² . Additionally the cmin requirements are also different please keep in mind that going larger in diameter is not always the best solutions as the potential reduction factors for spacing, and edge can have large influence reducing the capacity. All of the above can be found within a products European Technical Assessment. Please see the attached English extract from ETA 19/0601.
