Hi Sai,
I don't think we have standard config for restricting the articles or materials for a particular bin by number.
We can enhance the putaway strategy using /SCWM/IF_EX_CORE_PTS_FILT_SORT .
In the above BADI , you will get sequence of bins for a storage type. What we need to do is first find out the no of unique materials in bin as per business and if it exceeds then remove that proposed bin from sequence. So that WT will create out of remaining bins
In this way , we can control no of articles in a bin. This will work as we have done similar required for some customer.
Thanks,
Srikanth.A