IS-4
IS-4
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[Client Values; Actual values in
6,100,000  Cost |
| 2500500 HP Hit Points |
| 60.02/66.330.08/66.3 t Weight Limit |
- Commander (Radio Operator)
- Gunner
- Driver
- Loader
| 750750 hp Engine Power |
| 43/14 km/h Speed Limit |
| 3030 deg/s Traverse |
| 12.524.93 hp/t Power/Wt Ratio |
| NoNo Pivot |
| // mm Hull Armor |
| 250/200/170250/200/170 mm Turret Armor |
APCR/HEAT/HE
AP/HEAT/HE Shells |
1060/5200/608
1065/5200/630 Shell Cost |
| 390/390/530440/440/530 HP Damage |
| 217/270/61258/340/68 mm Penetration |
|
5.45 r/m ▲
5.22 r/m Standard Gun ▲ Rate of Fire Standard Gun |
|
2125.5 ▲
Standard Gun
▼
Standard Gun
▲
2296.8 Standard Gun ▲
Standard Gun
▼
Standard Gun
▲ Damage Per Minute Standard Gun |
|
0.44 m ▲
0.42 m With 50% Crew: 0.545 m ▲ Accuracy With 50% Crew: 0.52 m |
| 2.9 s 2.5 s Aim time |
| 2525 deg/s Turret Traverse |
| 360° Gun Arc |
| -6°/+16°-6°/+16° Elevation Arc |
| 3030 rounds Ammo Capacity |
| 1515 % Chance of Fire |
| 400 m 400 m View Range |
| 720 m 720 m Signal Range |
Additional Statistics
(Top Configuration)
Camouflage
- Stationary: 6.9%
- When Moving: 3.4%
- When Firing: 1.4%
Terrain Resistance
- On Hard Ground: 1.15
- On Medium Ground: 1.53
- On Soft Ground: 2.59
Dispersion Change Values
- Turret Contribution
- Rotation: 0.08
- Shot Recoil: 3.36
- Suspension Contribution
- Acceleration: 0.24
- Turning: 0.24
With 100% Crew
X
6100000
The IS-4 is a Soviet tier 10 heavy tank.
The project was developed by the Design Bureau of the Chelyabinsk Kirov Plant starting in December 1943. In April 1944 two prototypes of the Object 701 were built. After prototype trials, the design was improved. In late 1944 and early 1945 two more prototypes underwent trials. The Object 701 No. 5 was recommended for adoption into service. However, production was called off in favor of the IS-3 just entering mass-production. After IS-3 production was suspended in 1946, production of the IS-4 began, continuing until 1949. A total of 25 IS-4M tanks were built in 1951. Later all previously produced tanks were modernized to the level of the IS-4M. According to different sources, between 235 and 258 vehicles were built in total; they were stationed in the Far East.
As t development of its Heavy Tank tech tree, the IS-4 goes for the more versatile "Jack-of-All-Trades/Master-of-None" approach to its in-game performance. Its gun is adequate for its tier, but is quite unimpressive in any single aspect such as accuracy or DPM. Its turret armor is quite strong frontally, but can be easily over-matched when shot through the exposed roof, where it is much weaker. Its hull armor is decent, boasting a tough all-around layout which gives the tank good side-scraping capabilities, but is relatively easy to punch through from the front, even if angled properly. Its mobility is totally different from its quick and nimble brother, the IS-7 with the IS-4 being very sluggish and slow by comparison.
The culmination of these characteristics makes the IS-4 feel like more of a support tank rather than an all out assault leader. While the IS-4 mounts a more accurate 122mm main gun as opposed to the 130mm cannon of the IS-7 and the Object 705A, it still isn't very well suited for long range sniping and if you miss a shot it can be a painful experience. In addition, the tank does not have the speed and maneuverability to get itself into position quickly and relocate if needed. These drawbacks largely restrict the efficiency of the IS-4 to medium and short range brawler-type combat. However, due to the low vertical profile of the tank, it enjoys a somewhat better camouflage rating and can utilize many forms of cover much more effectively - peek out, fire a shot at the enemy, then dive back into safety. But due to its below average dispersion, it will require a few seconds to fully aim or risk a hard miss otherwise. All of the above points demonstrate the IS-4 for what it currently is - a Jack-of-All-Trades tank, permitting its driver greater versatility at the expense of any exceptional capabilities.
The IS-4 marks the end of its Soviet heavy line.
Modules / Available Equipment and Consumables
Modules
Guns
| Tier | Gun | Penetration (mm) |
Damage (HP) |
Rate of fire (rounds/minute) |
Dispersion (m/100m) |
Aiming time (s) |
Weight (kg) |
Price (  )
| |
|---|---|---|---|---|---|---|---|---|---|
| X | 122 mm M62-T2 | 258/340/68 | 440/440/530 | 5.22 | 0.42 | 2.5 | 3397 | 335000 | |
| VIII | 122 mm D-25TS | 217/270/61 | 390/390/530 | 5.45 | 0.44 | 2.9 | 2590 | 125140 |
Engines
| Tier | Engine | Engine Power (hp) |
Chance of Fire on Impact (%) |
Weight (kg) |
Price ( )
| |
|---|---|---|---|---|---|---|
| X | V-12 | 750 | 15 | 1024 | 128000 |
Suspensions
| Tier | Suspension | Load Limit (т) |
Traverse Speed (gr/sec) |
Rmin | Weight (kg) |
Price ( )
| |
|---|---|---|---|---|---|---|---|
| X | IS-4M | 66.3 | 30 | B/2 | 11000 | 61350 |
Radios
| Tier | Radio | Signal Range (m) |
Weight (kg) |
Price ( )
| |
|---|---|---|---|---|---|
| X | 10RK-26 | 720 | 160 | 51600 |
Compatible Equipment
Compatible Consumables
Player Opinion
Pros and Cons
Pros:
- Same top gun as the ST-I, with much improved soft stats
- Good armor profile - strong turret armor and thick side hull armor
- Large healthpool, largest among all Soviet heavy tanks
- Low profile compared to preceding tanks in the branch (such as ST-I)
- Good top speed for a heavy tank
Cons:
- Sluggish acceleration and average mobility
- Frontal hull armor has several weakspots, and is overall unreliable
- Fairly lacking in DPM and full aimed dispersion
- Below average gun depression
Performance
Among the oldest techtree tanks available to players, the IS-4 could be called the most "flavorless" of the Tier 10 Soviet heavy tanks. It lacks the sheer armor thickness and firepower of Object 705A, and the mobility and flexibility of Object 277, and is not as good an assault leader as the renowned IS-7. What the IS-4 offers though, is a 'jack of all trades' package that, while outclassed by its brethren in specific areas, is overall good in every department without compromising anything for specializations.
That is not to say the IS-4 is without merits though. First of all, its armor profile is deceptively durable. While its upper and lower glacis are not very thick (at least when compared to other overarmored tanks seen in Tier 10), its frontal cheeks and side armor are not only thick but also well angled, making a sidescraping IS-4 an exceptionally tough opponent to deal with, to the point artillery and large caliber HE are the only surefire ways to deal damage to it. Its turret armor is also very well armored despite its raw thickness being inferior to its more modern techtree counterparts.
The gun is the same 122mm M62-T2 used on the preceding ST-I, and while its raw alpha and penetration are the same, it enjoys much better gun handling and a rather decent aim time, as well as a higher rate of fire. Unfortunately, the IS-4 has a much worse gun depression compared to the ST-I, as well as a lower ammo capacity, which can lead to uncomfortable situations if the player positions themselves poorly or is wasteful with their ammunition.
Mobility-wise, the IS-4 is your typical heavy tank. It enjoys a pretty good top speed and a serviceable reverse speed, but is fairly lacking in acceleration and can feel sluggish to maneuver, especially on uneven terrain. It can relocate, but won't go anywhere as fast as its quicker techtree brothers such as the Object 277.
Overall, the IS-4 is not a bad tank, but the ever advancing powercreep dooms it to mediocrity. It is considered obsolete and a poor choice for the competitive environment, such as Clan Wars, but it can still be a powerful asset in random battles. Its playstyle is also quite easy to master, as it has much in common with, of all things, the Tier 7 IS. Any player who has enjoyed the IS and its many premium counterparts, will have no trouble adjusting to the IS-4 and having success in it.
- 1.10 reworked the IS-4
Rof from 5.21 -> 5.44 (Reload time from 11.51 -> 11.03, DPM from 2294 -> 2394) Aim time from 2.78 -> 2.40 Gun handling from 0.24/0.24/0.08 -> 0.17/0.17/0.06 Dispersion from 0.36 -> 0.40 (Unknown why this was nerfed, but it was) Hull armor (Frontal thickness) from 140 -> 155mm Removal/buff of turret roof weakspot Stock gun is now the reworked 122mm from the KV-4 and ST-I (mostly useless)
Early Research
It's impossible to advance from the ST-I without researching the improved gun, so the IS-4 should instantly arrive as an elite tank.
Suggested Equipment
Gallery
Historical Info
1. Obiekt 701-2, armed with the S-34 100mm gun;
2. Obiekt 701-5, with a different armour configuration;
3. Obiekt 701-6, armed with the standard D-25T 122mm gun.
The latter was accepted for further development. There were three significant changes in the Obiekt 701-6 design: thicker armour, a lengthened hull, and an uprated engine. The basic armour for the hull was increased to 160mm and the turret to 250mm. The 750hp V-12 engine used a revised cooling system influenced by the layout of German Panther tanks, with the radiators under a pair of circular fans. The design was accepted for quantity production as the IS-4 tank in 1947
After a short production run of only 200 tanks, IS-4 production was halted. The main criticism was that the speed and the mobility of the vehicle were inadequate. In the summer of 1950 after the outbreak of the Korean War, nearly all of the IS-4 regiments were shipped to the Far East. They were deployed to form the shock force for a tank army that Stalin was organising to intervene in the Korean conflict. In spite of intense pressure from the Chinese, Stalin decided against intervening in Korea for fear it would result in the outbreak of a general war with the nuclear-armed American armed forces. The IS-4s remained in the region and in the late 1950s, they were modernised along the same lines as the IS-3M, remaining in service into the 1960s. Currently preserved at the Kubinka armour museum near Moscow, the IS-4 shows physical similarity to the IS-2 and was the heaviest tank series ever produced in the USSR.
There have been repeated reports that several superheavy tanks were under development in the Soviet Union in 1945, including a 150 ton tank. However none of these designs appear to have progressed beyond paper studies, or they remain so secret that they still are not discussed today. Among these designs were reputed to be the Vladimir Lenin VL-1, fitted with a front mounted engine and rear mounted turret.
Historical Gallery
Historical Accuracy Errata
*Like many soviet tanks in game the IS-4 has increased gun depression. In reality it had -3° instead of -6°
- The IS-4 was never equipped with the M62 122mm cannon although the gun itself was designed to be able to fit all D-25T mounts
