Acciaio 1942
Giada 1954
Giada 1963
| Name | No | Yard No | Builder | Laid down | Launched | Comp | Fate |
| Acciaio | OTO, Muggiano | 11.1940 | 20.7.1941 | 1.1942 | sunk 13.7.1943 | ||
| Alabastro | CRDA, Monfalcone | 3.1941 | 18.12.1941 | 5.1942 | sunk 14.9.1942 | ||
| Argento | Tosi, Taranto | 4.1941 | 22.2.1942 | 5.1942 | sunk 3.8.1943 | ||
| Asteria | CRDA, Monfalcone | 10.1940 | 25.6.1941 | 11.1941 | sunk 17.2.1943 | ||
| Avorio | CRDA, Monfalcone | 11.1940 | 6.9.1941 | 3.1942 | sunk 9.2.1943 | ||
| Bronzo | Tosi, Taranto | 12.1940 | 28.9.1941 | 1.1942 | captured by UK 12.7.1943 (P714) | ||
| Cobalto | OTO, Muggiano | 11.1940 | 20.7.1941 | 1.1942 | sunk 12.8.1942 | ||
| Giada, 2.1948- PV2, 3.1951- Giada | 1953- S501 | CRDA, Monfalcone | 10.1940 | 10.7.1941 | 12.1941 | discarded 1.1966 | |
| Granito | CRDA, Monfalcone | 11.1940 | 7.8.1941 | 1.1942 | sunk 9.11.1942 | ||
| Nichelio | OTO, Muggiano | 7.1941 | 12.4.1942 | 7.1942 | to Soviet Union 2.1949 (È-42 [I-42]) | ||
| Platino | OTO, Muggiano | 11.1940 | 1.6.1941 | 10.1941 | discarded 2.1948 | ||
| Porfido | CRDA, Monfalcone | 11.1940 | 23.8.1941 | 1.1942 | sunk 6.12.1942 | ||
| Volframio (ex-Stronzio) | Tosi, Taranto | 12.1940 | 9.11.1941 | 2.1942 | scuttled 8.9.1943 |
|
Displacement standard, t |
629 - 643 |
|
Displacement normal, t |
697 / 850 |
|
Length, m |
60.2 |
|
Breadth, m |
6.44 |
|
Draught, m |
4.78 |
|
No of shafts |
2 |
|
Machinery |
2 Fiat diesels / 2 CRDA electric motors Argento, Bronzo, Volframio: 2 Tosi diesels / 2 Ansaldo or Marelli electric motors |
|
Power, h. p. |
1400 / 800 Argento, Bronzo, Volframio: 1500 / 800 |
|
Max speed, kts |
14 / 7.7 Argento, Bronzo, Volframio: 14.7 / 7.7 |
|
Fuel, t |
diesel oil 78 |
| Endurance, nm(kts) | 2300(14) / 80(4) |
|
Armament |
1 x 1 - 100/47 OTO 1938, 2 x 1 - 13.2/76 or 2 x 2 - 13.2/76 or 1 x 1 - 20/70 Scotti-Isotta Fraschini 1939 or 2 x 1 - 20/70 Scotti-Isotta Fraschini 1939, 6 - 533 TT (4 bow, 2 stern, 10) Argento, Bronzo, Volframio: 1 x 1 - 100/47 OTO 1938, 2 x 1 - 13.2/76 or 2 x 2 - 13.2/76 or 1 x 1 - 20/70 Scotti-Isotta Fraschini 1939 or 2 x 1 - 20/70 Scotti-Isotta Fraschini 1939, 4 - 533 TT (bow, 8) |
| Electronic equipment | hydrophone |
|
Complement |
45 |
| Diving depth operational, m | 80 |
Project history: Last, 5th series of 600t submarines. Repetition of Adua class with CT of moderated size for stability improvement and perceptibility decrease. Also power of diesels was raised. Three ships at the expense of application of even more powerful, than on remaining ships of series, had no stern TTs.
Modernizations: 1953, Giada: - 1 x 1 - 100/47; fin was streamlined, artillery consisted from 2 x 2 - 13.2/76, 701/865t, 1350/800hp, 14.7/7.9kts, complement 54, endurance surfaced 3500(8) nm, 40t of diesel oil, + radar, sonar
1950s, Giada: - 2 x 2 - 13.2/76
Naval service: Cobalto was sunk 12.8.1942 N of Bizerte by ramming of British destroyer Ithuriel. Alabastro was sunk 14.9.1942 on approaches to Philippeville (Algeria) by British aircraft. Granito was sunk 9.11.1942 near Cape St. Vito (Sicily) by British submarine Saracen. Porfido was sunk 6.12.1942 near cape Bon by British submarine Tigris. Avorio was sunk 9.2.1943 off Bougie by Canadian corvette Regina. Asteria was scuttled by crew 17.2.1943 NW of Bougie after attack of British escort destroyers Easton and Wheatland. Bronzo surrendered 12.7.1943 near Syracuse after battle against British minesweepers Boston, Cromarty and Poole, renamed P714, later transferred to France and named Narval. Acciaio was sunk 13.7.1943 N of Strait of Messina by British submarine Unruly. Argento was sunk 3.8.1943 S of Pantelleria by American escort destroyer Buck. Volframio was scuttled by crew 8.9.1943 in La Spezia harbour, raised by Germans but never commissioned by them and in 1944 sunk by Allied bombers.
Giada was remained in the navy list after war being officially classified as battery recharging station till March, 1951, when she was reclassified as submarine, modernized in 1951 - 1953 and commissioned again by Italian Navy.
Alabastro 1942
Giada 1959
© Ivan Gogin, 2009-15