The final squad of 15 players will be announced next month.
"I believe this squad shows just how much depth is there in South African cricket," commented CSA selection convener Andrew Hudson.
"It augurs extremely well both for this tournament as well as the road ahead," Hudson added.
Squad: A B de Villiers (captain), Hashim Amla, Farhaan Behardien, Johan Botha, Marchant de Lange, J P Duminy, Faf du Plessis, Reeza Hendricks, Imran Tahir, Colin Ingram, Jacques Kallis, Rory Kleinveldt, Richard Levi, Ryan McLaren, David Miller, Albie Morkel, Morne Morkel, Chris Morris, Justin Ontong, Wayne Parnell, Alviro Petersen, Robin Peterson, Aaron Phangiso, Graeme Smith, Dale Steyn, Rusty Theron, Lonwabo Tsotsobe, Roelof van der Merwe, Morne van Wyk, Dane Vilas.
