April 27 (Reuters) - South32 Ltd S32.AX
* qtrly metallurgical coal production 1,431 kt versus 1,392 kt in prior quarter
* Qtrly alumina production 1,288 kt versus 1,320 kt in prior quarter
* March quarter aluminum production 245 kt versus 249 kt prior quarter
* announced a us$500m capital management program
* maintained fy17 production guidance at illawarra metallurgical coal
* cannington's operating unit cost, including sustaining capital expenditure, is now expected to increase to us$155/t (previously us$141/t)
* capital expenditure of approximately us$420m (previously us$450m) is now expected in fy17
* revised fy17 and fy18 production guidance at south africa energy coal following heavy rainfall Source text for Eikon: ID:nASX5py1Fp Further company coverage: S32.AX