Utilize the input text as a context reference, choose the right relationship between Nucor and Steel from the options. Options: product/material produced, manufacturer, distributed by, industry, position held, original broadcaster, owned by, founded by, distribution format, headquarters location, stock exchange, currency, parent organization, chief executive officer, director/manager, owner of, operator, member of, employer, chairperson, platform, subsidiary, legal form, publisher, developer, brand, business division, location of formation, creator.

In addition, Nucor Steel Berkeley was recognized by GM for excellent quality and responsiveness, and received the Supplier Quality Excellence Award.

Answer: product_or_material_produced