The government of Africa's biggest economy has tried for months to negotiate a U.S. trade deal but failed to reach agreement before Trump's deadline.

South Africa will offer a "generous" new trade deal to the United States on Tuesday to avoid 30-per cent tariffs, government ministers said. Washington on Friday slapped the huge tariff on some South African exports,

Government hopes its revised proposal will break the deadlock in tariff talks with the United States and reopen trade opportunities for key South African export sectors.