The company said there was "constructive progress" in the engagements, with several interventions that could salvage the business and save 3,500 jobs at risk from the closure of the unit.

"ArcelorMittal South Africa is able to announce the deferral of the wind-down of the longs business to allow for its continued operation for up to six months," the company said in a statement.

Last November, ArcelorMittal announced plans to close its long steel business, which produces fencing material, rail, rods and bars used in the construction, mining and manufacturing sectors, citing low demand and infrastructure challenges that drove costs higher.

The South African unit of the world's No.2 steelmaker - ArcelorMittal - on Thursday also reported a full-year loss, dampened by weak demand and increased imports from China.

It posted a headline loss per share of 1.70 rand in the year ended Dec. 31 versus headline earnings per share of 2.34 rand the previous year.

($1 = 18.8897 rand)

(Reporting by Nelson Banya; Editing by Himani Sarkar and Sherry Jacob-Phillips)