T-62 is a Soviet main battle tank that was first introduced in 1961.As a further development of the T-55 series, the T-62 retained many similar design elements of its predecessor including low profile and thick turret armour. In contrast with previous tanks, which were armed with rifled tank guns, the T-62 was the first tank armed with a smoothbore tank gun that could fire APFSDS rounds at higher velocities. While the T-62 became the standard tank in the Soviet arsenal, it did not fully replace the T-55 in export markets due to its higher manufacturing costs and maintenance requirements compared to its predecessor. Although the T-62 was replaced in Russia and the successor states of the Soviet Union, it is still used in some countries and its design features became standardized in subsequent Soviet and Russian mass-produced tanks.
T-62A (Object 165) - At the end of 1958, Kartsev decided to modernise the Object 140 turret. He fitted it with a cartridge-case ejector and mounted it onto a stretched T-55 chassis. He also considered that designs based on already produced vehicles had a higher chance of acceptance. The Object 140 turret diameter, bigger than the T-55 turret by 249 mm, made redesigning the central part of the hull necessary. Kartsev changed the arrangement of the torsion beams, which was necessary to keep the tank weight balanced. The tank received the designation "Object 165" and in November 1958 three prototypes were built. In January 1962, the Object 165 was accepted for service under the name T-62A. In the same year, Factory 183 produced five tanks that were put into experimental service.