- Nation
- USSR
- Tier
- 7
- Class
- Heavy Tank
- Premium
- No
- Gift
- No
- Wheeled
- No
- Credits
- 1.424.000
- Gold
- 0
- Views
- 4
The IS-1 (IS-85) heavy tank was a thorough modernization of the KV-1. The tank featured the 85-mm D-5T gun. The IS-1 entered mass production in October 1943, but work was discontinued at the beginning of 1944, as the IS-2 (IS-122) tank entered mass production in December 1943. A total of 107 vehicles were manufactured.
Researchable next tanks
-
USSR · Tier 8 · Heavy Tank
-
USSR · Tier 8 · Heavy Tank
Default configuration

Radio
12RT
Signal range (m) | 625 |

Engine
V-2 (IS)
Power (hp) | 700 |
Fire chance | 0.15 |

Gun
85 mm D-5T (IS)
Reload (s) | 4.86 |
Fire rate | 12.350 |
Aim time (s) | 2.86 |
Dispersion | 0.460 |
Traverse (°/s) | 39 |
Ammo max | 59 |
Elev (°) | 22 |
Depress (°) | 5 |

Chassis
IS-1
Load limit (kg) | 0 |
Traverse (°/s) | 38 |

Turret
IS-85
HP | 200 |
Armor F/S/R | 100/90/90 |
Traverse (°/s) | 38 |
View range (m) | 340 |
All modules
Radio (1)

12RT
• 33.600 cr DEFAULT Signal range (m) | 625 |
Engine (2)

V-2 (IS)
• 36.000 cr DEFAULT Power (hp) | 700 |
Fire chance | 0.15 |
Next modules: V-2-54 (IS)

V-2-54 (IS)
• 79.290 cr Power (hp) | 750 |
Fire chance | 0.12 |
Gun (3)

85 mm D-5T (IS)
• 61.530 cr DEFAULT Reload (s) | 4.86 |
Fire rate | 12.350 |
Aim time (s) | 2.86 |
Dispersion | 0.460 |
Traverse (°/s) | 39 |
Ammo max | 59 |
Elev (°) | 22 |
Depress (°) | 5 |
Next modules: 100 mm D-10T (IS)

100 mm D-10T (IS)
• 78.180 cr Reload (s) | 8.57 |
Fire rate | 7.000 |
Aim time (s) | 2.86 |
Dispersion | 0.420 |
Traverse (°/s) | 33 |
Ammo max | 24 |
Elev (°) | 20 |
Depress (°) | 7 |
Next modules: IS-122
Chassis (2)

IS-1
• 12.990 cr DEFAULT Load limit (kg) | 0 |
Traverse (°/s) | 38 |
Next modules: IS-2M

IS-2M
• 18.080 cr Load limit (kg) | 0 |
Traverse (°/s) | 42 |
Turret (2)

IS-85
• 15.000 cr DEFAULT HP | 200 |
Armor F/S/R | 100/90/90 |
Traverse (°/s) | 38 |
View range (m) | 340 |

IS-122
• 26.300 cr HP | 270 |
Armor F/S/R | 100/90/90 |
Traverse (°/s) | 28 |
View range (m) | 350 |
Next modules: 122 mm D-25T (IS)