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Armor thresholds

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Revision as of 16:38, 6 September 2020
→ Notes‎ Updated the notes in accordance with the current state of the game
Latest revision as of 21:55, 22 September 2020
Edited mistake saying 3100mm Super Cruiser shell to the correct 310mm
 
Line 235:Line 235:
 | 19 mm || 272 mm | 19 mm || 272 mm
 | Tier 4 - 5 battleship bow/stern<br/>Tier 6 - 7 light cruiser side plating<br/>Tier 8 - 10 battleship superstructure<br/>Tier 8 - 10 destroyer plating  | Tier 4 - 5 battleship bow/stern<br/>Tier 6 - 7 light cruiser side plating<br/>Tier 8 - 10 battleship superstructure<br/>Tier 8 - 10 destroyer plating
?| Will bounce up to 254 mm AP if sufficiently angled.<br/>Notable: Can bounce ''Henri IV'' (240 mm), but not ''Graf Spee'', ''Scharnhorst'' (283 mm) and battlecruiser AP shells (305 - 3100 mm).+| Will bounce up to 254 mm AP if sufficiently angled.<br/>Notable: Can bounce ''Henri IV'' (240 mm), but not ''Graf Spee'', ''Scharnhorst'' (283 mm) and battlecruiser AP shells (305 - 310 mm).
 |- |-
 | 25 mm || 358 mm | 25 mm || 358 mm

Latest revision as of 21:55, 22 September 2020

HE penetration

Here are some common armor thicknesses and the minimum HE shell diameters needed to penetrate them (since Update 0.9.2), according to the HE penetration formula.

Changes to the Inertia Fuse for HE Shells Skill (Update 0.9.2).

Note that as per update 0.9.2 IFHE now halves the BASE fire chance of shells. For ships which rely on fire damage IFHE thus can be a poor choice even if significant armor thresholds are passed. The formula for fire chance can be found in Fires.

IFHE All Night Long by LittleWhiteMouse.

1/6, 1/5 and 1/4 are the HE shells' penetration coefficients.

Armor thickness (mm) HE shell diameter needed to penetrate (mm)
1/6 1/6 with IFHE 1/5 1/5 with IFHE 1/4 1/4 with IFHE
13 75 63 62.5 52.5 50 42
16 93 75 77.5 62.5 62 50
19 111 93 92.5 77.5 74 62
20 117 93 97.5 77.5 78 62
25 147 117 122.5 97.5 98 78
26 153 123 127.5 102.5 102 82
27 159 129 132.5 107.5 106 86
30 177 141 147.5 117.5 118 94
32 189 153 157.5 127.5 126 102
38 225 183 187.5 152.5 150 122
40 237 189 197.5 157.5 158 126
50 297 237 247.5 197.5 198 158
51 303 243 252.5 202.5 202 162
60 357 285 297.5 237.5 238 190

HE penetration (before Update 0.9.2)

OLD INFORMATION AS PER UPDATE 0.9.2. NEW INFORMATION IS UNDER CONSTRUCTION. THE UPDATE IS QUITE COMPLEX, SOME TIME IS NEEDED TO PROCESS ALL CHANGES.

Here are some common armor thicknesses and the minimum HE shell diameters needed to penetrate them, according to the HE penetration formula. "Super" refers to the 1/4 HE penetration coefficient.

By armor thickness

Armor thickness Occurrences
(non-exhaustive)
Beneficiaries (without IFHE)
(non-exhaustive)
Beneficiaries (with IFHE)
(non-exhaustive)
16 mm Tier 3 battleship bow/stern
Tier 6 - 7 battleship superstructure
Most tier 6 - 7 cruiser bow/stern
The entirety of British light cruiser and Smolensk hull plating
Tier 6 - 7 destroyer plating
All guns of 114 mm or more calibre
19 mm Tier 4 - 5 battleship bow/stern
Tier 6 - 7 light cruiser side plating
Tier 8 - 10 battleship superstructure
Tier 8 - 10 destroyer plating
All guns of 114 mm or more calibre
25 mm Tier 6 and 7 cruisers' decks, most tier 8 - 10 cruisers' bow/stern, tier 8 - 10 light cruisers' side plating Heavy cruisers (203mm)
Light cruisers (155mm)
Japanese 100 mm guns
German 105 mm secondary guns
Most destroyers (120 mm - 150 mm)
26 mm Tier 6 and 7 battleship bow/stern and some of their casemate plating Heavy cruisers (203 mm)
Light cruisers (180 mm, T8+ 152/155 mm)
Japanese 100 mm guns
German 105 - 150 mm guns
Light cruisers (152mm) up to and including tier 7
Most destroyers (127 mm - 139 mm)
27 mm Tier 8 and 9 cruiser decks, some tier 8 - 10 cruiser bow/stern (USN and German heavy cruisers) Heavy cruisers (203 mm)
Light cruisers (tier 8 - 10 152 - 155 mm, 180 mm)
Japanese 100 mm guns
German 128 - 150 mm guns
Light cruisers (152mm) up to and including tier 7
Some destroyers (130 mm - 139 mm, 100 mm super)
30 mm Most tier 10 cruiser deck plating, most tier 10 heavy cruiser side plating, Ägir, Siegfried, Albemarle and Drake deck plating Heavy cruisers (203 mm), tier 8 - 10 light cruisers (152, 155, 180 mm)
Japanese 100 mm guns
German 128 - 150 mm guns
Tier 7 and lower light cruisers (152 mm, 155 mm, 180 mm)
Donskoi and Molotov (180mm)
32 mm Tier 8 - 10 battleship bow/stern, tier 8 - 10 British and French battleships' casemate plating, Slava deck plating Heavy cruisers (203 mm)
German 128 - 150 mm guns (both main and secondary)
Most light cruisers (152 mm, 155 mm, 180 mm)
Japanese 100 mm guns
38 mm Tier 8 - 10 USN battleship decks Henri IV (240 mm)
Goliath (234 mm)
Superheavy cruisers (305 - 310 mm)
All german cruisers
German 150 mm guns
All non-German 203 mm ships, and Mogami. Not worth it on 203mm guns, since you lose a lot fire chance just to penetrate this category of armor.
50 mm Khabarovsk belt
Moskva, Stalingrad and Petropavlovsk casemate plating
Tier 7 - 10 German battleships' decks
German 203 mm (Hindenburg, Roon, Hipper, Yorck)
Superheavy cruisers (305 - 310 mm)
Henri IV (240 mm) (not worth it, considering how much fire chance you lose)
60 mm Sovetsky Soyuz, AL Sov. Rossiya and Kremlin deck Only battleship calibre HE can penetrate their deck armor German 203 mm (Hindenburg, Roon, Hipper, Yorck)
Superheavy cruisers (305 - 310 mm), but it's not worth speccing into IFHE considering how much fire chance you lose

By HE diameter

HE shell Occurrences
(non-exhaustive)
Maximum armor thickness penetrated IFHE beneficial against
(non-exhaustive)
Without IFHE With IFHE
Tier 8 - 10 152 mm
180 mm
Japanese 100 mm
Most light cruisers
Some Japanese destroyers/secondaries
30 mm 32 mm Tier 8 - 10 battleship bow/stern, tier 8 - 10 British and French battleships' casemate plating, Slava deck plating
419-420 mm with improved HE penetration Conqueror, Friedrich der Große, Großer Kurfürst, Lion 104 mm 136 mm Citadels: Cleveland, Edinburgh, Fiji, Helena, New Orleans, Worcester

Notes

  • As per the tables above, 152 mm and 155 mm HE, primarily found on light cruisers; and 100 mm HE, found on Japanese gunboat destroyers and some secondary batteries, are by far the biggest beneficiaries.
  • 180 mm HE benefits less from IFHE because of a more drastic relative reduction in fire chance for not much gain in both absolute and impactful damage output
  • The only secondary weaponst that may benefit from IFHE are German 105 mm secondaries with 26 mm base penetration, however, they give up a lot of fire chance for the ability to penetrate up to and including 32 mm plating, which is most of the time not worth it
  • Some other ships gain some benefit, but this is not generally considered worth the cost in skill points and the tradeoff in fire starting capabilities.

AP overmatch

An AP shell whose diameter is greater than 14.3 times the thickness of an armor plate will overmatch and pass through it regardless of angle. Here are some thresholds where this occurs, which determines whether it is feasible to "bow-tank" a particular AP shell.

Armor thickness AP shell diameter
needed to overmatch
Occurrences
(non-exhaustive)
Notes
10 mm 144 mm Tier 4-5 cruiser superstructure
Tier 4-5 destroyer plating
Will bounce most destroyer shells if sufficiently angled, but not most light cruiser shells.
13 mm 186 mm Tier 4 - 5 battleship superstructure
Tier 4 and 5 cruiser bow/stern
Most tier 6 - 7 cruiser superstructure
Will bounce light cruiser shells if sufficiently angled but not heavy cruiser shells (203 mm).
16 mm 229 mm Tier 3 battleship bow/stern
Tier 6 - 7 battleship superstructure
Most tier 6 - 7 cruiser bow/stern
The entirety of British light cruiser and Smolensk hull plating
Tier 6 - 7 destroyer plating
Will bounce almost all cruiser shells if sufficiently angled.
Notable: Can bounce Moskva (220 mm) but not Henri IV (240 mm), Graf Spee or Scharnhorst (283 mm).
19 mm 272 mm Tier 4 - 5 battleship bow/stern
Tier 6 - 7 light cruiser side plating
Tier 8 - 10 battleship superstructure
Tier 8 - 10 destroyer plating
Will bounce up to 254 mm AP if sufficiently angled.
Notable: Can bounce Henri IV (240 mm), but not Graf Spee, Scharnhorst (283 mm) and battlecruiser AP shells (305 - 310 mm).
25 mm 358 mm Tier 6 and 7 cruisers' decks, most tier 8 - 10 cruisers' bow/stern, tier 8 - 10 light cruisers' side plating Will bounce up to 14-inch shells (356 mm) if sufficiently angled.
26 mm 371 mm Tier 6 and 7 battleship bow/stern and some of their casemate plating Will bounce up to 15-inch shells (381 mm) if sufficiently angled.
27 mm 387 mm Tier 8 and 9 cruiser decks, some tier 8 - 10 cruiser bow/stern (USN and German heavy cruisers) Will bounce up to 15-inch shells (381 mm) if sufficiently angled.
30 mm 430 mm Most tier 10 cruiser deck plating, most tier 10 heavy cruiser side plating, Ägir, Siegfried, Albemarle and Drake deck plating At current only Thunderer (457 mm), Georgia (457 mm), Ohio (457 mm), Kremlin (457 mm), Musashi (460 mm), République (431 mm), Yamato (460 mm), and Shikishima (510 mm) can overmatch.
32 mm 458 mm Tier 8-10 battleship bow/stern, tier 8 - 10 British and French battleships' casemate plating, Slava deck plating At current only Musashi, Yamato (both 460 mm), and Shikishima (510 mm) can overmatch.
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