Workers at Dalzell Steelworks in Motherwell will take strike action against Tata Steel on Monday. June 22, in their ongoing dispute over pensions.
The strike action will be preceded by an overtime ban and a work to rule which is expected to begin next week.
A total of 13,000 workers from across the country who are members of Community, Unite, UCATT and GMB will take to the streets.
Roy Rickhuss, National Trade Union Steel Co-ordinating Committee chairman and Community general secretary, said: “Tata have given us no option but take industrial action by not showing any willingness to return to meaningful negotiations to find an end to this dispute.
“Our members are determined to stand up for their pensions and delivered a massive vote in favour of industrial action, so that is what will happen.
“An overtime ban and work-to-rule will cause massive disruption to Tata’s operations and severely limit production.
The company could avoid this by returning to the table. But in the meantime all the unions will also be making preparations for a national day of strike action on 22 June.”
Dave Hulse, GMB national officer, added: “It’s time Tata got back round the table and looked for a way to resolve this dispute.”