Quinton de Kock will captain the T20 squad with Rassie van der Dussen as vice-captain while Temba Bavuma will be the vice-captain to Faf du Plessis in the Test match squad.
The fast bowler represented South Africa in 93 Tests and took 439 wickets at an average of 22.95. Steyn is the leading wicket-taker for his nation in the longest format as he went past Shaun Pollock earlier this year.
