Italian Acciaio-class submarine (Porfido)
|Preceded by:||Adua class|
|Succeeded by:||end of 600 series|
|Length:||60.18 m (197 ft 5 in)|
|Beam:||6.44 m (21 ft 2 in)|
|Draught:||4.78 m (15 ft 8 in)|
|Range:||3,180 nmi (5,890 km) at 10.5 kn (19.4 km/h) surfaced|
|Test depth:||80 m (260 ft)|
The Italian Acciaio-class submarine (also sometimes called Platino class) was the fifth subclass of the 600 Series of coastal submarines built by the Regia Marina. They were completed during the early 1940s and saw service in World War II.
The Acciaios were a development of the Adua and Perla designs, with some improvements, such as a lower conning tower to improve stability and reduce the silhouette. Of the 13 vessels in the class, six were built by CRDA at Monfalcone, four by OTO at Muggiano, and three by Tosi in Taranto, the three main Italian shipyards for submarines. They were single-hulled with side tanks, and built to a Bernardis design, though the Tosi vessels had more powerful engines (at the expense of the two stern torpedo tubes, giving a surface speed of 14.7 knots (27.2 km/h; 16.9 mph).
The word Acciaio means "steel", and all vessels in this class were named for metals and minerals.
Of the 13 vessels completed 8 were lost in action, serving in the Mediterranean theatre of operations.
|Acciaio||OTO||20.7.41||torpedoed 13.7.43 by HMS Unruly|
|Alabastro||CRDA||18.12.41||bombed 14.9.42 by Allied aircraft|
|Argento||Tosi||22.2.42||sunk 3.8.43 by USS Buck|
|Asteria||CRDA||25.6.41||sunk 17.2.43 by HMS Easton, HMS Wheatland,|
|Avorio||CRDA||6.9.41||sunk 8.2.43 by HMCS Regina|
|Bronzo||Tosi||28.9.41||captured 12.7.43 by British destroyers|
|Cobalto||OTO||20.7.41||rammed 12.8.42 by HMS Ithuriel|
|Giada||CRDA||c10.7.41||surrendered at armistice Sept 1943|
|Granito||CRDA||7.8.41||torpedoed 9.11.42 by HMS Saracen|
|Nichelio||OTO||12.4.42||surrendered at armistice Sept 43|
|Platino||OTO||1.6.41||surrendered at armistice Sept 43|
|Porfido||CRDA||23.8.41||torpedoed 6.12.42 by HMS Tigris|
|Volframio||Tosi||9.11.41||scuttled at armistice sept 43; raised by Germans, sunk in Allied air raid 1944|
- Conway p310
- Bagnasco p163
- C Adamo at regiamarina.net
- Bagnasco, E :Submarines of World War Two (1977) ISBN 0 85368 331 X
- Conway : Conways All the Worlds Fighting Ships 1922-1946 (1980) ISBN 0 85177 146 7