Ship Main guns Displacement Propulsion Service Laid down Commissioned Fate SMS Helgoland 12 × 30.5 cm (12.0 in)[51] 24,700 t (24,300 long tons)[51] 3 screws, triple expansion engines, 20.8 kn (38.5 km/h; 23.9 mph)[51] 1908[51] 23 August 1911[54] Scrapped in 1921[54] SMS Ostfriesland 12 × 30.5 cm (12.0 in)[51] 24,700 t (24,300 long tons)[51] 3 screws, triple expansion engines, 21.2 kn (39.3 km/h; 24.4 mph)[51] 1908[51] 1 August 1911[54] Expended as a target in 1921[54] SMS Thüringen 12 × 30.5 cm (12.0 in)[51] 24,700 t (24,300 long tons)[51] 3 screws, triple expansion engines, 21 kn (39 km/h; 24 mph)[51] 1908[51] 10 September 1911[54] Scrapped in 1923–1933[54] SMS Oldenburg 12 × 30.5 cm (12.0 in)[51] 24,700 t (24,300 long tons)[51] 3 screws, triple expansion engines, 21.3 kn (39.4 km/h; 24.5 mph)[51] 1909[51] 1 May 1912[54] Scrapped in 1921[54]