A devastating spell of reverse swing from Steyn, and another big innings from Faf du Plessis help beat Australia in tri-series final at Harare Sports Club on Saturday.
Faf du Plessis continued his great form by compiling third hundred takes South Africa into tri-series final after crush Zimbabwe by 63 runs.
An eye-catching all-round performance by Mitchell Marsh carried Australia to a 62-run victory over South Africa on Tuesday to secure their place in the triangular series final.
Michael Clarke will return home Tuesday after aggravating a hamstring injury during Australia's embarrassing one-day international loss to Zimbabwe in Harare, Cricket Australia said.
Chigumbura along with Utseya took Zimbabwe to historic victory against Australia after 1983 World Cup.
South Africa survived a batting collapse precipitated by a hat-trick from spinner Prosper Utseya to beat Zimbabwe by 61 runs in the third match of the triangular series on Friday.
Zimbabwe must overcome the discord in their camp as well as a skill handicap when they take on South Africa in a one-day international triangular series match in Harare on Friday.
AB de Villiers hit a superb 136 off 106 while Faf du Plessis scored 106 off 98 to guide the Proteas home to a seven-wicket win 20 balls to spare.
South Africa will look to extract an advantage from their superior spin stocks when they take on a hard-hitting Australian side in the second match of a triangular series in Harare on Wednesday.
Australia set new ODI record at Harare before bowlers skittle Zimbabwe for a 198-run victory to open tri-series at Harare Sports Club on Monday.