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GarageImage IS-4M.jpg

The IS-4M is a rank V Soviet heavy tank with a battle rating of 7.7 (AB/RB/SB). It was introduced during the closed beta testing for Ground Forces before Update 1.41.

General info

Survivability and armour

Armour type:

  • Rolled homogeneous armour (Hull, Turret roof, Hatch roof)
  • Cast homogeneous armour (Turret)
Armour Front Sides Rear Roof
Hull 140 mm (62°) Front glacis
160 mm (40°) Lower glacis
160 mm (34-77°) Driver's port
40 mm (44-87°) Top of Driver's port
160 mm (30-53°) Top
160 mm Middle
30 mm (61°) Bottom
100 mm (37°) Top
30 mm (80°) Middle
100 mm (31-39°) Bottom
30 mm
Turret 200-250 mm (2-89°) Turret front
200 mm (0-65°) , 170 + 250 mm (2-61°) Gun mantlet
200 mm (3-40°) 150 (62-72°) Top
170 mm (21-49°) Bottom
30 mm Front, Hatch roof, Ventilators
50 mm Front sides
170 mm Center


  • Suspension wheels are 20 mm thick, torsion bars are 10 mm thick, and tracks are 30 mm thick.


Mobility characteristic
Weight (tons) Add-on Armour
weight (tons)
Max speed (km/h)
60.0 N/A 45 (AB)
43 (RB/SB)
Engine power (horsepower)
Mode Stock Upgraded
Arcade 968 ___
Realistic/Simulator 663 750
Power-to-weight ratio (hp/ton)
Mode Stock Upgraded
Arcade 16.13 __.__
Realistic/Simulator 11.05 12.50


Main armament

Main article: D-25T (122 mm)
122 mm D-25T
Capacity Vertical
30 -3°/+19° ±180° N/A
Turret rotation speed (°/s)
Mode Stock Upgraded Prior + Full crew Prior + Expert qualif. Prior + Ace qualif.
Arcade 9.4 13.0 __.__ __.__ __.__
Realistic 6.9 8.1 __.__ __.__ __.__
Reloading rate (seconds)
Stock Prior + Full crew Prior + Expert qualif. Prior + Ace qualif.
27.1 __.__ __.__ 20.8
Penetration statistics
Ammunition Type of
Penetration in mm @ 90°
10m 100m 500m 1000m 1500m 2000m
BR-471 APHE 204 200 182 162 144 128
BR-471B APHEBC 205 202 191 178 165 154
BR-471D APCBC 229 227 214 199 186 173
OF-471 HE 45 45 44 43 42 42
Shell details
Ammunition Type of
in m/s
Mass in kg
Fuse delay

in m:

Fuse sensitivity

in mm:

Explosive Mass in g
(TNT equivalent):
Normalization At 30°
from horizontal:
0% 50% 100%
BR-471 APHE 795 25 1.2 15 272 -1° 47° 60° 65°
BR-471B APHEBC 795 25 1.2 15 272 +4° 48° 63° 71°
BR-471D APCBC 800 25 1.2 15 212.5 +4° 48° 63° 71°
OF-471 HE 800 25 0.1 0.1 3,600 +0° 79° 80° 81°
Ammo racks
Ammo racks of the IS-4M.
rack empty
rack empty
rack empty
rack empty
rack empty
rack empty
30 Projectiles
29 (+1)
29 (+1)
24 (+6)
24 (+6)
19 (+11)
19 (+11)
14 (+16)
14 (+16)

Machine guns

Main article: DShK (12.7 mm)
12.7 mm DShK
Pintle mount
Capacity (Belt capacity) Fire rate
250 (50) 600 -10°/+60° ±180°
Coaxial mount
Capacity (Belt capacity) Fire rate
1,000 (50) 600 N/A N/A

Usage in battles

Describe the tactics of playing in the vehicle, the features of using vehicles in the team and advice on tactics. Refrain from creating a "guide" - do not impose a single point of view but give the reader food for thought. Describe the most dangerous enemies and give recommendations on fighting them. If necessary, note the specifics of the game in different modes (AB, RB, SB).

Pros and cons


  • Very good frontal armour; can even bounce 128 mm shells from the Maus.
  • Retains the powerful D-25T 122mm gun as on the previous IS-2 and IS-3
  • The mere presence of an IS-4 can make enemies panic or run and hide.
  • Slightly wider choices of ammo compared to the IS-2 and IS-3.


  • Can - and will - be a priority target for the enemy team due to its fearsome reputation
  • Long reload of 20 seconds
  • Ammo rack in the back of the turret; if a shell penetrates, the ammo could detonate.



During the development of the IS-3 in 1944 under General Nikolai Dukhov, a separate project was underway by a design team led by L.S. Troyanov to improve the IS-2 design. This separate project commenced under the designation Object 701. The project produced three proposed design. The Object 701-2 with a S-34 100 mm gun, 701-5 with a different armour configuration, and the 701-6 with the 122 mm D-25 gun. The 701-6 was accepted for further development, to which was modified with thicker armour, longer hull, and a more powerful engine. There was some implementation of German designs into the prototype; the engine has a cooling system that uses a pair of circular fans on the engine deck, a feature also is seen on the Panther tank.[1]


Object 701 was eventually approved for production in 1947 as the IS-4. The production turned out 200 tanks (some sources say 250) before the production was halted. The reason being that the IS-4 was criticized for being inadequate in mobility despite its new engine.[1] While production ended, the remaining IS-4 still saw service in the Soviet Union. When the Korean War broke out in 1950 and the United States and its allies got involved, the IS-4s were all shipped to the Far East of the Soviet Union in anticipation of Soviet intervention in the Korean War. They were not committed despite pressure by the Chinese from fear of inciting another world war. Even so, the IS-4 stayed in the region ready for action. In the late 1950s, the IS-4 underwent a modernization program along the lines of the IS-3 with increased ammo stowage, new machine gun armaments, new gun optics, better engine, and better filtration system and this modernized variant was named the IS-4M.[1] The IS-4 stayed in service in the Soviet Union until the 1960s.


The IS-4, as a relatively unsuccessful Soviet tank, faded to obscurity with little information on it passed its development period. It was the heaviest of the Soviet heavy tanks that were slated for production. The IS-4's design was further developed on in the IS tank family with the Object 703, with the design using an electrical transmission instead of a mechanical one. This vehicle redesignated the IS-6, also proved to be problematic and was shelved.[1]

In-game description

Development of this tank began in July 1943 at the ChKZ factory. The main impetus for creating a new Soviet heavy tank was the prospect of being able to install more powerful artillery on it than what was installed on the IS-2. The vehicle underwent testing until the autumn of 1944. The new vehicle had one inarguable virtue - no tank or anti-tank cannon of Soviet or German make could penetrate its 160 mm frontal armour. At the end of 1944, two more vehicles equipped with modernised transmission were produced.

In April 1945, the tank was put into service and mass-produced under the designation IS-4. The vehicle's hull was fully welded, while its turret was cast with tapering armour thickness. Along with its 122 mm D-25T cannon, it was also armed with a coaxial 12.7 mm machine gun. An identical machine gun was placed as an anti-aircraft gun on a ring mount above the loader's hatch. One of the vehicle's characteristic features was its original ammunition rack, in which shells were housed in special metal canisters. The tank had epicyclic transmission and individual torsion-bar suspension. The crew consisted of 4 people. The vehicle's powertrain was a 750 hp B-12 diesel engine. With this engine, the tank could reach 43 km/h on-road.

The IS-4 was mass-produced until 1949. In total, around 250 of them were made. These vehicles served in the Far East.

It became clear during its deployment that the tank's mass exceeded the carrying capacity of most bridges and transport platforms. It was this fact that effectively buried the idea of building vehicles with a mass greater than 50 tonnes. The IS-4 was taken out of operation and placed in long-term storage, and then withdrawn from service entirely. After this, it was often used on ballistic ranges as a target.


Camouflages and skins for the IS-4 from


  1. 1.0 1.1 1.2 1.3 Zaloga Steven. IS-2 Heavy Tank 1944-73 Great Britain: Osprey Publishing Ltd., 1994

See also

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  • reference to the series of the vehicles;
  • links to approximate analogues of other nations and research trees.

External links

Paste links to sources and external resources, such as:

  • topic on the official game forum;
  • encyclopedia page on tank;
  • other literature.

USSR heavy tanks
KV  KV-1 (L-11) · KV-1 (ZiS-5) · KV-1E · KV-1S · KV-85 · KV-122 · KV-220
  KV-2 (1939) · KV-2 (1940) · KV-2 (ZiS-6)
IS  IS-1 · IS-2 · IS-2 (1944) · IS-2 "Revenge" · IS-3 · IS-4M · IS-6 · IS-7 · T-10A · T-10M
Other  Object 279
Multi-turreted  SMK · T-35
Lend-Lease  ▂MK-II "Matilda"