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 submit a revised trade proposal to the United States to reduce the newly imposed 30 percent tariff and seek alternative export markets to offset the impact, a government official said Tuesday.

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,