IRONORE/ Index heavyweights BHP Group Ltd BHP.AX fell 0.1%, while Fortescue Metals Group FMG.AX was flat. By Archishma Iyer April 12 (Reuters) - Australian shares closed lower on Tuesday, in line with broader Asia as investors awaited U.S. inflation data that is expected to reinforce the Federal Reserve's stance of aggressive policy normalisation to contain broadening pricing pressure. MSCI's broadest index of Asia-Pacific shares outside Japan .MIAPJ0000PUS was down 0.2% as investors braced for likely red-hot U.S. inflation data that is expected to show prices last month increased by the most in 16-1/2 years.