There is a march over the planned closure of Orport's Newport steelworks with 380 vulnerable jobs.
Tata Steel announced last month that the site will be closed after no buyer was found.
On Saturday workers marched through Newport.
The plant producing electrical steel for power transmission was offered for sale in May 2018. Tata wanted to focus on the core business of steel.
Tata said it would have cost £ 50 million to upgrade the Orb site to make it competitive.