IS-2 No.321

IS-2 No.321

IS-3

IS-2 No.321

IS-3

USSR

IV Rank

Battle rating:

AB	RB	SB
6.7	6.7	6.7

Class:

Heavy tank

Purchase:Bundle or Gift

Show in game

Description

The IS-2 No.321 is a gift rank IV Soviet heavy tank with a battle rating of 6.7 (AB/RB/SB). It was introduced during Update "Wind of Change" as a reward for the Legend of Victory event.

General info

Survivability and armour

Smoke grenades

Creation of a smoke screen in front of the vehicle

Armourfront / side / back

Hull100 / 90 / 60

Turret100 / 100 / 100

Crew4 people

Visibility102 %

Describe armour protection. Note the most well protected and key weak areas. Appreciate the layout of modules as well as the number and location of crew members. Is the level of armour protection sufficient, is the placement of modules helpful for survival in combat? If necessary use a visual template to indicate the most secure and weak zones of the armour.

Armour type:

• Cast homogeneous armour (Turret, Hull front, Hull sides)
• Rolled homogeneous armour (Lower hull glacis, Hull rear, Hull & Turret roof)

Armour	Front (Slope angle)	Sides	Rear	Roof
Hull	100 mm (45-50°) Front glacis 100 mm (31-33°) Lower glacis	100-110 (14-25°) Top front 90 mm (12-14°) Top rear 90 mm Bottom	60 mm (49-50°) Top 60 mm (38°) Bottom	30 mm
Turret	100 mm (6-85°) Turret front 115-130 mm Gun mantlet	100 mm (22-52°)	100 mm (6-62°)	30 mm
Cupola	90 mm			30 mm

Notes:

• Suspension wheels are 20 mm thick, tracks are 30 mm thick, and torsion bars are 10 mm thick.
• Wooden logs laid on the hull sides are 100 mm thick.
• A 45 mm thick plate lies behind the gun mantlet above and below the gun breech.

Mobility

Speedforward / back

AB40 / 16 km/h

RB and SB38 / 15 km/h

Number of gears8 forward

2 back

Weight46.2 t

Engine power

AB992 hp

RB and SB520 hp

Power-to-weight ratio

AB21.5 hp/t

RB and SB11.3 hp/t

Game Mode	Max Speed (km/h)		Weight (tons)	Engine power (horsepower)		Power-to-weight ratio (hp/ton)
	Forward	Reverse		Stock	Upgraded	Stock	Upgraded
Arcade	40	16	46.2	671	992	14.52	21.47
Realistic	38	15		460	520	9.96	11.26

Modifications and economy

Repair costBasic → Reference

AB4 506 → 5 848

RB4 642 → 6 025

SB6 373 → 8 272

Total cost of modifications61 700

102 700

Talisman cost1 800

Crew training61 000

Experts210 000

Aces890

Research Aces570 000

Reward for battleAB / RB / SB

140 / 190 / 220 %

178 / 178 / 178 %

Modifications

Mobility	Protection	Firepower
Tracks Research: 3 100 Cost: 5 200 150 Suspension Research: 3 500 Cost: 5 800 170 Brake System Research: 3 500 Cost: 5 800 170 Filters Research: 5 100 Cost: 8 500 250 Transmission Research: 5 000 Cost: 8 300 240 Engine Research: 5 000 Cost: 8 300 240	Improved Parts Research: 3 100 Cost: 5 200 150 Improved FPE Research: 3 500 Cost: 5 800 170 Crew Replenishment Research: 5 100 Cost: 8 500 250 Smoke grenade Research: 5 000 Cost: 8 300 240	Horizontal Drive Research: 3 100 Cost: 5 200 150 122mm_APHE_ammo_pack Research: 3 100 Cost: 5 200 150 Adjustment of Fire Research: 3 500 Cost: 5 800 170 Elevation Mechanism Research: 5 100 Cost: 8 500 250 122mm_APCBC_ammo_pack Research: 5 000 Cost: 8 300 240

Armaments

Main armament

122 mm D-25T cannon

Ammunition28 rounds

Reloadbasic crew → aces

27.1 → 20.8 s

Vertical guidance-3° / 20°

122 mm D-25T					Turret rotation speed (°/s)					Reloading rate (seconds)
Mode	Capacity	Vertical	Horizontal	Stabilizer	Stock	Upgraded	Full	Expert	Aced	Stock	Full	Expert	Aced
Arcade	28	-3°/+20°	±180°	N/A	11.3	15.7	19.0	21.1	22.4	27.04	23.92	22.05	20.80
Realistic					8.3	9.8	11.9	13.2	14.0

Ammunition

Penetration statistics
Ammunition	Type of warhead	Penetration @ 0° Angle of Attack (mm)
		10 m	100 m	500 m	1,000 m	1,500 m	2,000 m
BR-471	APHE	205	201	183	162	144	128
BR-471B	APHEBC	205	203	191	178	166	155
OF-471	HE	37	37	37	37	37	37

Shell details
Ammunition	Type of warhead	Velocity (m/s)	Projectile Mass (kg)	Fuse delay (m)	Fuse sensitivity (mm)	Explosive Mass (TNT equivalent) (g)	Ricochet
							0%	50%	100%
BR-471	APHE	795	25	1.2	19	246.4	47°	60°	65°
BR-471B	APHEBC	795	25	1.2	19	246.4	48°	63°	71°
OF-471	HE	800	25	0	0.1	3,600	79°	80°	81°

Ammo racks

Ammo racks of the IS-2

Full ammo	Ammo part	1st rack empty	2nd rack empty	3rd rack empty	4th rack empty	5th rack empty	6th rack empty	Visual discrepancy
28	Projectiles Propellants	13 (+15) 27 (+1)	1 (+27) 24 (+4)	N/A 21 (+7)	N/A 11 (+17)	N/A 6 (+22)	N/A 1 (+27)	No

Notes:

• The IS-2 No.321 uses two-piece ammunition, composed of projectiles (yellow) and propellant bags (orange). Both have separate racks.
• Shells are modeled individually and disappear after having been shot or loaded.
• Centre floor rack emptied: 11 (+17) shells.

Machine guns

12.7 mm DShK machine gun

Ammunition250 rounds

Belt capacity50 rounds

Reloadbasic crew → aces

10.4 → 8.0 s

Fire rate600 shots/min

Vertical guidance-10° / 60°

7.62 mm DT machine gun (coaxial)

Ammunition1 890 rounds

Belt capacity63 rounds

Reloadbasic crew → aces

10.4 → 8.0 s

Fire rate600 shots/min

12.7 mm DShK
Mount	Capacity (Belt)	Fire rate	Vertical	Horizontal
Pintle	250 (50)	600	-10°/+60°	±180°

7.62 mm DT
Mount	Capacity (Belt)	Fire rate	Vertical	Horizontal
Coaxial	1,890 (63)	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 instead 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

Pros:

• Powerful 122 mm gun with enough explosive filler to knock out a tank with a single penetrating shot.
• Large calibre gives round good overmatching mechanics against most front armour of medium tanks.
• Upper hull plate is thickly armored and angled, able to resist most shells with the exception of HEAT or APDS.
• Relatively good mobility and top speed for a heavy tank, with a faster reverse speed as well to withdraw quickly.
• Roof mounted machine gun can help defend against lightly-armoured vehicles or low-flying aircraft.

Cons:

• Long reload speed makes follow-up shots slow
• Has front armour weak points in the turret and lower glacis.
• Hull armour construction makes angling difficult due to weaker hull sides and cheeks
• Cramped interior compartment can likely knock out entire crew or ignite ammunition in a single shot.
• Poor -3 degree depression prohibits the usage of many hull-down fighting positions
• No add-on spaced armour compared to the original IS-2 (1944).

History

Describe the history of the creation and combat usage of the vehicle in more detail than in the introduction. If the historical reference turns out to be too long, take it to a separate article, taking a link to the article about the vehicle and adding a block "/History" (example: https://wiki.warthunder.com/(Vehicle-name)/History) and add a link to it here using the main template. Be sure to reference text and sources by using <ref></ref>, as well as adding them at the end of the article with <references />. This section may also include the vehicle's dev blog entry (if applicable) and the in-game encyclopedia description (under === In-game description ===, also if applicable).

Media

Excellent additions to the article would be video guides, screenshots from the game, and photos.

See also

Links to the articles on the War Thunder Wiki that you think will be useful for the reader, for example:

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

External links

• [Devblog] Legend of Victory: IS-2 №321