1/7/2024 0 Comments Military engineer tank driverCracks were found after impacts in four cases:.The same part with 0.20% carbon showed a limit of complete penetration of 714 m/s and limit of partial penetration of 685 m/s. Part (driver's hatch) containing 0.22% carbon showed a limit of complete penetration of 727 m/s and limit of partial penetration of 690 m/s.The type of damage when penetrated is satisfactory.Limit of complete penetration is 714-727 m/s. Limit of partial penetration is 685-715 m/s. The resilience of part (driver's hatch) under fire at normal meets requirements for 8S (MZ-2) cast steel.The chemical composition is attached to this record. Characteristics of the components under test:Ĥ driver's hatches (part ) cast from 8S (MZ-2) steel, thermally hardened and mechanically finished (hardness of part is 2.8-3.1) were assembled together with shutters (parts, ) cast from 8S (MZ-2) steel, thermally hardened and mechanically finished (hardness of 3.5-4.0).Shell velocity was determined using two Tsirsky timers connected in parallel. Trials with a 76 mm gun were not held due to the absence of a reloading bench. Trials were held using a model 1937 anti-tank gun firing 45 mm shells (blueprint 2-03347) from 50 meters at normal and at angles of 30 and 60 degrees. ![]() Goal: determine the resistance of armoured component assembled with components and to ascertain suitability for production.Rationale: order of Deputy Director of factory #183 comrade Makhonin dated March 20th, 1941.
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