ATM Class 4600 and 4700

The ATM Class 4600 and 4700 are a series of articulated trams used by the ATM on the Milan urban tramway network.

ATM Class 4600 and 4700
Car no. 4733 in 1969, in the original livery and using a trolley pole
Manufacturer	Stanga, Breda
Constructed	1955–1960
Number built	13 (Class 4600) 20 (Class 4700)
Fleet numbers	4601–4613 4714–4733
Capacity	36 (Seated) 139 (Standing)
Specifications
Train length	19,840 mm (65 ft 1 in)
Low-floor	no
Articulated sections	2
Wheelbase	1,800 mm (71 in)
Maximum speed	50 km/h
Weight	26.5 t (58,000 lb)
Traction motors	TIBB GLM 0300
Power output	220.8 kW (296.1 hp)
Power supply	600 V DC Overhead line
Current collector(s)	Pantograph
Track gauge	1,445 mm (4 ft 8+7⁄8 in)

They were projected in the 1950s as an articulated version of the series 5300; originally a series of 15 cars (to be numbered from 4601 to 4615) was foreseen, but the two last units were delivered in an experimental "all electric| version and, because of that, were numbered in the 4700 series. Some years later a second series of "all-electric" cars was built, numbered from 4716 to 4733, and bringing the total number of 4700-type cars to 20 vehicles.^[1]

Originally, the cars were painted in a two-tone-green livery, later repainted in the orange livery, and since 2010 in a white-and-yellow livery.

Beginning from early 2017, the 4700 series were gradually revamped, with flooring, sections of the chassis and interior furnishing being replaced. Air conditioning was also implemented.^[2]

On the 25th of February 2025, after years of slow retirement due to the ageing of the fleet, the last 4600 was removed from service.^[3] The 4700 series persist and are still in service.

• 
  Car nr. 4722 in orange livery
• 
  Car nr. 4603 in white and yellow livery
• 
  Car nr. 4723, revamped in 2017

Bibliography

• Giovanni Cornolò, Giuseppe Severi: Tram e tramvie a Milano 1840-1987., Azienda Trasporti Municipali, Milan 1987.