D-25T (122 mm)

Description

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Vehicles equipped with this weapon

• KV-122
• IS-2
• ␗IS-2
• IS-2 No.402
• IS-2 (1944)
• IS-2 "Revenge"
• ␗IS-2 (1944)
• IS-3
• IS-4M
• T-10A

General info

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Available ammunition

• BR-471 - The default APHE shell with decent penetration of 205 mm on distance of 10 meters. Fairly slow muzzle velocity that's just shy of 800 m/s. Contains plenty of explosives (TNT equivalent of almost 250 g!)
• BR-471B - APHEBC shell. Is identical in terms of explosives, muzzle velocity to the BR-471. Ballistic cap lowers the decrease of penetration over distance, and slightly changes penetration chance on different angles.
• OF-471 - HE shell. Contains 3.6 kg of TNT inside, which translates to 37 mm of penetration that is not dependent on angle or distance. Barely faster than APHE shells.
• BR-471D* - APCBC shell. Contains just over 190 g of TNT inside. Its muzzle velocity is 800 m/s, and has penetration value of 230 mm on distance of 10 meters.

*Available only for the IS-3, IS-4M and T-10A

Comparison with analogues

D-25T cannon is quite an unique gun on it's own Battle Rating. In comparison with lower BR tanks, such as Tiger II or T26E1-1 Super Pershing you may expect lower penetration power, but both of those tanks have around half of its TNT equivalent inside, which translates into less post penetration effect. Those vehicles will usually only cripple tanks, while D25T gun is able to easily oneshoot most of enemy tanks if penetrated.

This point stands even on higher battle rating vehicles equipped with this armament, but you may still lack in penetration, becouse unlike early MBT's you won't have any HEAT-FS projectiles with higher penetration. However - penetrating shells through thin side armor of Main Battle Tanks is not that hard, and everytime you manage to do that it will be likely to reward you with kill.

Usage in battles

IS-2 & KV-122

The 122 mm cannon can penetrate almost every enemy tank frontally (exceptions exist: Tiger I vision port, Tiger II hull, as well as american heavy tanks turrets frontally), and reliably knock outs the tank in a single shot because of the high amount of explosive filler. The downside of such firepower is the long reload which forces you to engage from a distance.

IS-3, IS4-M & T-10A

Tank's armour gets tougher to pierce at higher ranks and their guns are also improved. Chemical energy shells are more common, which means that getting rid of enemies in a single blow is really important. Well armoured enemies are going to withstand your shells easily, so heavy tanks will be difficult to deal with. MBTs on the other hand will most likely penetrate you easily, but that's a double edged sword for them: they can penetrate you but you can also penetrate them. They may have a mobility advantage, but in terms of post-penetration damage you definitely are ahead of them.

Pros and cons

Pros:

• Amazing penetration (at IS-2's BR) and post-penetration damage effects often leads to taking out enemy vehicles with a single shot
• The later APCBC shell (BR-471D) has slightly better penetration, while still retaining its wonderful post-penetration damage
• Stock shell (BR-471) has similar performance to the later BR-471B on the IS-2

Cons:

• Slow reload of around 20 seconds, mid-range sniping or providing heavy fire for your team is advised
• Has poor elevation angles on all models equipped with it.
• When attacking different targets, switching ammo types will take time
• At IS-3 or IS-4M's BR, it can't reliably penetrate tanks frontally

History

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Media

Chinese  IS-2 Using D-25T cannon

See also

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• reference to the article about the variant of the cannon/machine gun;
• references to approximate analogues by other nations and research trees.

External links

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China tank cannons
30 mm	ZPL02 · ZPZ02
73 mm	Type 86
76 mm	M32K1
85 mm	Type 56 · Type 63
100 mm	PTP86 · Type 59 · Type 69 · Type 69-II · ZPL04
105 mm	88B-105T · Type 83 · WMA301 · ZPL94 · ZPL98A
120 mm	122TM · PTZ89
125 mm	Type 88C · Type 99A · ZPT98
130 mm	PL59A Gai
152 mm	PL66 Gai
	Foreign:
20 mm	KwK30 (Germany)
37 mm	M6 (USA)
45 mm	20-K (USSR)
47 mm	Type 1 (Japan)
57 mm	Type 97 (Japan) · ZIS-2 (USSR)
75 mm	M2 Howitzer (USA) · M3 (USA) · M6 (USA)
76 mm	D-56T (USSR) · F-34 (USSR) · M1 (USA) · M7 (USA) · ZIS-3 (USSR)
85 mm	ZIS-S-53 (USSR)
90 mm	M3 (USA) · M41 (USA)
100 mm	D-10S (USSR)
105 mm	M68 (USA) · M68A1 (USA)
115 mm	U-5TS (USSR)
122 mm	A-19 (USSR) · D-25T (USSR)
152 mm	ML-20S (USSR)