Become A Customer Login

Thank you for your interest in becoming a customer of Big River Steel. As the world’s first Flex Mill™, our unique combination of the latest steelmaking technology allows us to produce a wide range of steel products. But being a Flex Mill™ means more than the equipment in our mill. Being a Flex Mill™ is a mindset: A new way of operating a steel company. It is based on innovation and collaboration. It is focused on our customers and what you need from a steel mill.

As part of that focus, we offer various communication options so you can choose what work best for you.

Sign in or request a login below to securely submit important set up documents like contact information, ship-to information, credit applications and order requirements.


Email us at to request a PDF of our Welcome Packet that you can fill out by hand and mail or scan back to us.

All of us at Big River Steel look forward to building a relationship with you and your colleagues.

Together, let’s GO BIG!


If you don’t have a login, click here to request one.