National Union of Metalworkers members were still on strike at BHP Billiton's Hillside aluminium smelter in Richards Bay on Monday, a union spokesman said.
“We call on our members to intensify their militant action until an acceptable offer is presented by the spoilt golden boys and girls of BHP Billiton,” said Mbuso Ngubane, Numsa KwaZulu-Natal secretary, in a statement.
Comment from BHP Billiton was not immediately available.
The strike involving around 200 workers began last Wednesday. The union wanted a 12 percent across-the-board wage increase, a 50 percent employer contribution to the medical aid scheme, the total banning of the use of labour brokers and six months fully-paid maternity leave.
Ngubane said BHP Billiton presented a revised offer on Thursday, but the union rejected it. Negotiations reached a deadlock in August, he said.
Hillside is the largest aluminium smelter in the southern hemisphere and South Africa's major producer of primary aluminium. - Sapa