Microsoft no longer offers SQL Server 2016 ISO directly on the main download page for new users (they push newer versions), but you can still get it via the if you have a license, or from Microsoft’s older download archive :
In this article, we have guided you through the process of downloading and installing SQL Server 2016 Standard Edition 64-bit ISO update. We have also covered the system requirements, downloading and installing updates, and verifying the installation. With these steps, you should be able to successfully install and configure SQL Server 2016 Standard Edition on your 64-bit system. sql server 2016 standard edition download 64bit iso upd
Choose the Default instance or create a Named instance. Microsoft no longer offers SQL Server 2016 ISO
Download Microsoft® SQL Server® 2016 Service Pack 1 (SP1) from Official Microsoft Download Center. SQL Server 2016 | Microsoft Evaluation Center Choose the Default instance or create a Named instance