The BHP Whyalla Tramway is a 1067 mm (3 ft 6 in) gauge heavy-haul railway, 112 kilometres (70 miles) long, on the Eyre Peninsula in South Australia.

[4] The Hummock Hill to Iron Knob Tramways and Jetties Act 1900 authorised BHP to build a 54 kilometre line from Hummock Hill, Whyalla to Iron Knob that opened on 28 August 1901.

[11][12] In the 1960s, the internal Whyalla Steelworks network was converted to standard gauge to allow large 200 ton capacity torpedo ladles to be used.

[13][14] It also allowed standard gauge trains from interstate to access the steelworks when the Whyalla railway line opened in October 1972.

[22] In July 2019, five former Queensland Railways 2250 class locomotives were repatriated from South Africa to replace the GWNs.