Welcome to Wargaming.net Wiki!


Jump to: navigation, search
Cruiser | Pan-Asia | Tier IX
Tech Tree Position
Research price170000 exp
Purchase price13,000,000 Credits
Hit Points28,800 
Main Battery
127 mm/54 Mk.42 on a twin mount6 х 2 pcs.
Rate of Fire13.33 shots/min.
Reload Time4.5 sec.
Rotation Speed40 deg./sec.
180 Degree Turn Time4.5 sec.
Firing Range13.64 km.
Maximum Dispersion127 m.
HE Shell127 mm HE Mk.41 
Maximum HE Shell Damage1,800 
Chance of Fire on Target Caused by HE Shell%
Initial HE Shell Velocity808 m./s.
HE Shell Weight31.75 kg.
AP Shell127 mm AP/SC Mk38 Mod 2 
Maximum AP Shell Damage2,100 
Initial AP Shell Velocity808 m./s.
AP Shell Weight31.75 kg.
Torpedo Tubes
533 mm Mk314 х 4 pcs.
Rate of Fire0.48 shots/min.
Reload Time125 sec.
Rotation Speed25 deg./sec.
180 Degree Turn Time7.2 sec.
Maximum Damage17,900 
Torpedo Speed67 knot
Torpedo Range12 km.
AA Defense
127 mm/54 Mk.42 on a twin mount6 х 2 pcs.
. . . Average Damage per Second209.4 
. . . Firing Range5.19 km.
20 mm Oerlikon on a Mk.24 mount6 х 2 pcs.
. . . Average Damage per Second36.6 
. . . Firing Range2.01 km.
20 mm Oerlikon on a Mk.4 mount14 х 1 pcs.
. . . Average Damage per Second50.4 
. . . Firing Range2.01 km.
40 mm/56 Bofors on a Mk.2 mount8 х 4 pcs.
. . . Average Damage per Second127.2 
. . . Firing Range3.51 km.
Maximum Speed33 knot
Turning Circle Radius670 m.
Rudder Shift Time10.8 sec.
Surface Detectability Range11.97 km.
Air Detectability Range7.41 km.
Battle Levels

Sejong — Pan-Asian Tier IX cruiser.

CL-154 class cruisers were designed in the U.S. as a development of the Atlanta-class cruisers. They featured a larger hull and 5-inch guns. The new gun had a higher rate of fire, longer firing range, and heavier shells. Six ships even received their hull numbers, but construction was canceled due to cuts in the naval budget in 1945. Had they been completed, some of the cruisers might have been transferred to the Republic of Korea Navy, which in the 1950s and 60s acquired 42 warships of various types from the United States.


Main Battery Guns Rate of Fire
180° Turn Time
Maximum Dispersion
Maximum HE Shell Damage
Chance of Fire on Target Caused by HE Shell
Maximum AP Shell Damage
Research price
Purchase price
127 mm/54 Mk.42 on a twin mount13.34.51271,80092,100 01,300,000
Hull Hit Points
Main Turrets
Secondary Gun Turrets
AA Mounts
Torpedo Tubes
Hangar Capacity
Research price
Purchase price
Sejong (A)28,800695614/6/8/64 01,950,000
Sejong (B)29,800695620/8/64 48,0003,000,000
Torpedoes Rate of Fire
Torpedo Tubes Reload Time
180° Turn Time
Maximum Damage
Torpedo Speed
Torpedo Range
Research price
Purchase price
Mark 170.51257.2 01,300,000
Maximum Firing Range
Research price
Purchase price
Mk9 mod. 10 01,300,000
Mk9 mod. 20 32,0002,000,000
Engine Maximum Speed
Research price
Purchase price
Propulsion: 90,000 hp33 01,300,000

Compatible Upgrades

 Slot 1 
Main Armaments Modification 1
Auxiliary Armaments Modification 1
Magazine Modification 1
Damage Control Party Modification 1
 Slot 2 
Damage Control System Modification 1
Defensive AA Fire Modification 1
Engine Room Protection
 Slot 3 
Main Battery Modification 2
AA Guns Modification 1
Aiming Systems Modification 1
Smoke Generator Modification 1
Torpedo Tubes Modification 1
 Slot 4 
Damage Control System Modification 2
Propulsion Modification 1
Steering Gears Modification 1
Depth Charges Modification 1
 Slot 5 
Torpedo Lookout System
Concealment System Modification 1
Steering Gears Modification 2
Ship Consumables Modification 1
 Slot 6 
Main Battery Modification 3
Torpedo Tubes Modification 2
Gun Fire Control System Modification 2
Auxiliary Armaments Modification 2

Player Opinion


Warning. The data presented in the AA Defense sidebar section may be incorrect.
Refer to the in-game Port screens for more useful data.

At Tier IX, Sejong continues the HE and torpedo spam play style developed over the rest of the line. A variant of the American CL-154 project, Sejong shares many similarities with her American cousin X Austin and Pan Asian successor X Jinan, as well as other destroyer-caliber cruisers like VII Atlanta and Flint. Combining a fast-firing main battery and four heavy-hitting quadruple deepwater torpedo launchers with flexible Pan Asian smokescreens and a Torpedo Reload Booster, Sejong can stall capital ship pushes and quickly deal with destroyers that get too close.


Sejong is armed with twelve 127mm guns in six twin turrets, with similar characteristics to those found on Austin. But while Austin’s HE shells have similar stats, Sejong's lose speed more quickly due to higher drag, and thus have longer flight times and higher shell arcs. Her turret traverse and reload are among the fastest of any cruiser, but her small caliber limits the damage she can do to battleships and heavily armored cruisers. In those cases, she relies on superstructure hits and setting fires. Although her fire chance per shell is one of the lowest for Tier IX – only 9% – with twelve shells per salvo and a fast reload she can still set fires consistently. Sejong has AP shells, but their low penetration makes them ineffective at almost all ranges. In most situations, her HE shells will be the best choice. With her floaty shells, hitting longer range or agile targets can be a challenge. But her fast reload makes her a big threat to any destroyer that gets caught too close.

In addition to her main battery, Sejong carries two quadruple deepwater torpedo launchers per side. Like those found on the Pan Asian destroyer line, they have a low detection range but can’t hit destroyers. Sejong's are faster than those of any other Tier IX cruiser, with an excellent range as well as high damage and flood chance. They’re ideal for area denial or against isolated battleships and cruisers, as well as providing a painful deterrent against pushing ships if she has to run. With her torpedo reload booster, she can have up to 32 torpedoes in the water at the same time.


Sejong features the standard consumable suite for high tier Pan Asian cruisers. In addition to the normal cruiser Repair Party and Damage Control Party, she has access to the Defensive AA Fire consumable, a Smokescreen with a relatively short cooldown period, and the Torpedo Reload Booster consumable. Unlike most other high tier cruisers, Sejong does not have access to the Hydroacoustic Search consumable, leaving her more vulnerable to enemy torpedoes.

Sejong's smokescreen consumable is identical to those found on the preceding cruisers. Like the Pan Asian destroyer smoke generator, it has a good action time and average dispersion time, but the downtime between one smokescreen expiring and the next being available is just 40 seconds. However, Sejong only has three charges compared to Chung Mu’s five.

While she doesn’t get the extended smoke times of US smokescreens, the shorter cooldown means less waiting for the next if she has to abandon a smokescreen early.


Sejong is one of the most agile cruisers at Tier IX, with an excellent rudder shift and turning circle. Unlike the preceding ships, Sejong is one of the slowest in her tier. Although her handling is slightly worse than VIII Harbin, players familiar with the lower tier cruisers should still feel comfortable in Sejong.

If absolutely necessary, players can use her excellent agility to survive in the open. But her floaty shells, lack of health and armor, and slow speed make this a risky and less effective last resort if island or smoke cover is available.


Like her predecessors, Sejong is the exact opposite of durable. She has the second smallest health pool of any Tier IX cruiser, and one of the lowest out of all Tier VIII to X cruisers. Sejong inherits Austin’s armor, including a 32mm main belt that can provide some protection against battleship AP and smaller caliber cruiser shells. However, she also shares Austin’s relative lack of armor elsewhere, with 16mm bow, stern, and deck plating and a vulnerable citadel that extends well above the waterline.

Sejong's excellent concealment also aids in her survival. When fully upgraded, her surface detection can get as low as 9.7km. Although some Tier VIII cruisers can still outspot her, she is one of the stealthiest cruisers at Tier IX or X. She can sneak around the map and get closer to a cap or move between island cover before getting spotted. Her low 5.5km smoke firing penalty also allows her to farm from smoke with less risk of enemy destroyers spotting her.

Players should not rely on Sejong’s health or armor to keep her alive. Staying undetected, along with a player’s ability to dodge incoming fire when spotted, will be her main sources of protection.


As an anti-aircraft focused cruiser, Sejong has an impressive anti-aircraft suite to deter enemy planes. Although she doesn’t have the 6.9km reach of ships like IX Seattle or Neptune, her long range defenses and flak are still some of the strongest at Tier IX. Although Seattle’s flak deals slightly more damage per individual explosion, Sejong produces more flak per salvo than any other Tier IX cruiser. Her mid range defenses are below average for the tier, but in exchange they have some of the longest range. Although her close range defenses lack the extended reach of Dmitri Donskoi and Dalian, only Alaska’s deal more damage.

Like the other tech tree cruisers, Sejong mounts the Defensive AA Fire consumable by default, which can increase her defenses even further.

Her long range defenses and high flak count offer more than enough protection to deter attacking planes and cover nearby allied ships. A determined carrier will still be able to get a strike through, but it will be costly.

Battle performance

Just as with Austin, Flint, and other small caliber cruisers, Sejong prefers to play around island cover. With her high shell arcs, she can comfortably fire over her protective island armor to provide support in a cap or farm battleships. Her smokescreens allow her to produce an ‘island’ on demand if necessary, but her lack of hydro leaves her more vulnerable to incoming torpedoes.


  • Fast main battery reload and turret traverse
  • Uses deepwater torpedoes, with high damage and low detection
  • Reasonably fast torpedo reload
  • Strong AA defenses, further boosted by the Defensive AA FireWhile active, the damage per second of large caliber anti-aircraft guns is increased. consumable
  • Very agile
  • Good concealment
  • Has access to the Smoke GeneratorWhile active, generates a smoke screen that blocks line-of-sight for both enemies and teammates. consumable
  • Has access to the Torpedo Reload BoosterWhen used, torpedo reload time is significantly reduced. consumable


  • Very thin armor plating and vulnerable citadel
  • Very low health
  • Small main battery shell caliber, making it more difficult to damage capital ships
  • Slow shell velocity makes hitting targets at range more difficult
  • Deepwater torpedoes can’t hit destroyers
  • Lower top speed
  • Does not have access to the Hydroacoustic SearchWhile active, detects all enemy ships and torpedoes within the specified radius, without regard of obstacles such as smoke and terrain. consumable


Availability of researchable upgrades for Sejong is as follows:

  • Hull: Upgrade to Sejong (B) for more health, improved maneuverability, and AA (see above for cost). Research of this module unlocks progression to Jinan.
  • Gun Fire Control System: Upgrade to Mk9 mod. 2 for an extra 10% range on the main battery.

Optimal Configuration


The recommended upgrades are:

Slot 3 presents the biggest choice in defining Sejong's play style. Players that wish to boost her gun performance should select Aiming Systems Modification 1 : -7% main battery dispersion. / +20% torpedo tubes traverse speed. / +5% secondary battery firing range. / -5% secondary battery dispersion. or the coal Smoke Generator Modification 1 Increases the action time of the Smoke Generator, Short-Burst Smoke Generator, Crawling Smoke Generator, Exhaust Smoke Generator, and Smoke Curtain Generator consumables.: +20% smoke screen emission time. upgrade. Those that wish to play Sejong as a torpedo cruiser should instead select Torpedo Tubes Modification 1 +20% traverse speed of torpedo tubes. / −40% chance of critical damage to torpedo tubes. / +5% to the speed of shipborne torpedoes. to increase her torpedo speed and reduce the risk of her torpedo tubes getting knocked out or destroyed.

In slot 6, players can opt for Gun Fire Control System Modification 2 : +16% firing range. to increase Sejong's lackluster firing range. However, her floaty shells and long flight times will limit the usefulness of that extra range to farming battleships and stationary cruisers.

Commander Skills


Sejong equips the following consumables:


Note: Use of the Juliet Charlie signal makes detonation impossible.


Historical Info

Historical Gallery


Ship Change Log

See here for links to Update notes.

  • Available for testing by supertesters in the game starting from Update 0.10.10.

Testing Changes

  • DevBlog 220:
    • Preliminary characteristics.
  • DevBlog 242:
    • Fixed an issue because of which the HE shell ballistics of the ship differed from the similar shells of Tier X cruiser Jinan:
      • HE shell ballistics became more arcing.
  • DevBlog 249:
    • Main battery reload time decreased from 5.25 to 5 s.
    • Main battery firing range increased from 13.3 to 14 km.
    • Torpedo tubes reload time decreased from 133 to 126 s.
  • DevBlog 264:
    • Main battery reload time increased from 5 to 5.5 s.
    • Smoke Generator consumable cooldown time increased from 100 to 110 s.
  • Added to early access in Update 0.11.0, Sejong could drop from 1 of 60 random bundles available in the Armory for 1000 doubloons each.
  • Update 0.11.1:
    • Minor corrections to geometry and textures of the ship.
  • Introduced into the game as a researchable ship in Update 0.11.2.
  • Update 12.0:
    • Main battery reload time reduced from 5.5 to 5.2 s.
  • Update 12.5:
    • Main battery reload time reduced from 5.2 to 4.8 seconds.
    • Reload time of the ship's torpedo tubes has been reduced from 133 to 125 seconds.
  • Update 12.10:
    • Main battery reload time reduced from 4.8 to 4.5 s.
    • Researchable Gun Fire Control System main battery firing range increased from 14 to 15 km; the stock module’s main battery firing range has been increased accordingly.
    • Main battery shell ballistics have been changed; the trajectory will now be flatter.
  • Update 13.3:
    • Depth Charge damage increased from 1,700 to 2,100.

Ships of Pan-Asia
Destroyers  II Longjiang • III Phra Ruang • IV Shenyang • V Jianwei • VI Fushun • VI AnshanDoubloons • VII Gadjah Mada • VIII Hsienyang • VIII SiliwangiDoubloons • VIII LoyangDoubloons • VIII FenyangDoubloons • VIII Loyang BDoubloons • VIII Ship SmashaDoubloons • IX Chung Mu • X Yueyang • X Lüshun •  Kunming 
Cruisers  I Chengan • III Ning HaiDoubloons • V Chungking • VI Rahmat • VI HuangheDoubloons • VII Chumphon • VIII Harbin • VIII IrianDoubloons • VIII WukongDoubloons • IX Sejong • IX DalianDoubloons • IX MengchongDoubloons • IX TianjinDoubloons • X Jinan 
Battleships  IX BajieDoubloons • IX WujingDoubloons • IX Sun Yat-SenDoubloons • IX LouchuanDoubloons 
Aircraft Carriers  VIII SanzangDoubloons
Japan  I Hashidate • II Chikuma • III Tenryū • III KatoriDoubloons • IV YūbariDoubloons • IV Kuma • IV Iwaki AlphaDoubloons • V Furutaka • V Agano • V YahagiDoubloons • VI Aoba • VI Gokase • VII Myōkō • VII Omono • VII TokachiDoubloons • VII MayaDoubloons • VII ARP MyōkōDoubloons • VII ARP AshigaraDoubloons • VII ARP HaguroDoubloons • VII Southern DragonDoubloons • VII Eastern DragonDoubloons • VII ARP NachiDoubloons • VIII Mogami • VIII ToneDoubloons • VIII AtagoDoubloons • VIII Shimanto • VIII Atago BDoubloons • VIII ARP TakaoDoubloons • VIII ARP MayaDoubloons • IX Ibuki • IX Takahashi • IX AzumaDoubloons • IX AL AzumaDoubloons • IX Chikuma II • X Zaō • X Yodo • X YoshinoDoubloons • X Yoshino BDoubloons • X Kitakami 
U.K.  I Black Swan • II Weymouth • III Caledon • IV Danae • V Emerald • V Hawkins • V ExeterDoubloons • VI Leander • VI Devonshire • VI LondonDoubloons • VI DidoDoubloons • VI Orion '44Doubloons • VII Fiji • VII Surrey • VII BelfastDoubloons • VIII Edinburgh • VIII Albemarle • VIII CheshireDoubloons • VIII Tiger '59Doubloons • VIII Belfast '43Doubloons • VIII HampshireDoubloons • VIII NottinghamDoubloons • VIII AL CheshireDoubloons • VIII STAR EdinburghDoubloons • IX Neptune • IX Drake • X Monmouth • X Minotaur • X Goliath • X PlymouthDoubloons • X GibraltarDoubloons • X Defence •  Edgar 
France  I Bougainville • II Jurien de la Gravière • III Friant • IV Duguay-Trouin • V Émile Bertin • VI La Galissonnière • VI De GrasseDoubloons • VI DupleixDoubloons • VI MontcalmDoubloons • VII Algérie • VII ToulonDoubloons • VIII Charles Martel • VIII Cherbourg • VIII BayardDoubloons • IX Saint-Louis • IX Brest • IX CarnotDoubloons • X Henri IV • X Marseille • X ColbertDoubloons •  Condé 
U.S.S.R.  I Orlan • II DianaDoubloons • II Diana LimaDoubloons • II Novik • III AuroraDoubloons • III Bogatyr • III OlegDoubloons • III VaryagDoubloons • III AL AvroraDoubloons • IV Svietlana • V MurmanskDoubloons • V Kotovsky • V Krasny KrymDoubloons • V MikoyanDoubloons • V KirovDoubloons • VI Budyonny • VI MolotovDoubloons • VI Admiral MakarovDoubloons • VII Shchors • VII LazoDoubloons • VII Lazo BDoubloons • VIII Chapayev • VIII Tallinn • VIII Mikhail KutuzovDoubloons • VIII OchakovDoubloons • VIII Pyotr BagrationDoubloons • VIII Dmitry PozharskyDoubloons • IX Dmitri Donskoi • IX Riga • IX KronshtadtDoubloons • X MoskvaDoubloons • X Alexander Nevsky • X Petropavlovsk • X StalingradDoubloons • X Smolensk B • X SmolenskDoubloons • X SevastopolDoubloons • X Kommissar •  Novosibirsk 
U.S.A.  I Erie • II Chester • II AlbanyDoubloons • III St. Louis • III CharlestonDoubloons • IV Phoenix • V Omaha • V MarbleheadDoubloons • V Marblehead LimaDoubloons • V RattleheadDoubloons • VI Pensacola • VI Dallas • VII AtlantaDoubloons • VII New Orleans • VII Helena • VII IndianapolisDoubloons • VII Atlanta BDoubloons • VII BoiseDoubloons • VII FlintDoubloons • VIII Baltimore • VIII Cleveland • VIII WichitaDoubloons • VIII AnchorageDoubloons • VIII CongressDoubloons • VIII RochesterDoubloons • VIII San DiegoDoubloons • VIII AL MontpelierDoubloons • IX Buffalo • IX Seattle • IX VallejoDoubloons • IX AlaskaDoubloons • IX TulsaDoubloons • IX Alaska BDoubloons • X Des Moines • X Worcester • X Puerto RicoDoubloons • X SalemDoubloons • X AustinDoubloons •  Annapolis 
Germany  I Hermelin • II Dresden • II EmdenDoubloons • III Kolberg • IV Karlsruhe • V Königsberg • VI Nürnberg • VI Admiral Graf SpeeDoubloons • VI LeipzigDoubloons • VI HSF Admiral Graf SpeeDoubloons • VII Yorck • VII MünchenDoubloons • VII WeimarDoubloons • VIII Admiral Hipper • VIII Prinz EugenDoubloons • VIII MainzDoubloons • VIII SchillDoubloons • VIII Mainz BDoubloons • VIII Cross of DornDoubloons • VIII Wiesbaden • IX Roon • IX SiegfriedDoubloons • IX ÄgirDoubloons • IX Admiral SchröderDoubloons • IX Roon CLRDoubloons • X Hindenburg •  Clausewitz 
Pan-Asia  I Chengan • III Ning HaiDoubloons • V Chungking • VI Rahmat • VI HuangheDoubloons • VII Chumphon • VIII Harbin • VIII IrianDoubloons • VIII WukongDoubloons • IX Sejong • IX DalianDoubloons • IX MengchongDoubloons • IX TianjinDoubloons • X Jinan 
Spain  I Júpiter • II Méndez Núñez • III Navarra • IV Almirante Cervera • V Galicia • VI Baleares • VI CanariasDoubloons • VII Asturias • VIII Cataluña • VIII NumanciaDoubloons • IX Andalucía • X Castilla 
Europe  I Gryf • VI ElliDoubloons 
Netherlands  I Van Kinsbergen • II Gelderland • III Java • IV De Ruyter • V Celebes • VI Kijkduin • VII Eendracht • VIII Haarlem • VIII De Zeven ProvinciënDoubloons • IX Johan de Witt • IX Van SpeijkDoubloons • X Gouden Leeuw • X Prins van Oranje 
Italy  I Eritrea • II Nino Bixio • III Taranto • IV Alberto di Giussano • V Raimondo Montecuccoli • V GenovaDoubloons • VI Trento • VI Duca d'AostaDoubloons • VII Zara • VII Duca degli AbruzziDoubloons • VII Francesco FerruccioDoubloons • VII GoriziaDoubloons • VIII Amalfi • IX Brindisi • IX MichelangeloDoubloons • X Venezia • X NapoliDoubloons • X Napoli BDoubloons •  Piemonte 
Commonwealth  I Sutlej • II Port Jackson • III Caradoc • IV Dunedin • V Delhi • VI Hobart • VI PerthDoubloons • VI MysoreDoubloons • VII Uganda • VIII Auckland • IX Encounter • IX HectorDoubloons • X Cerberus • X BrisbaneDoubloons 
Pan-America  I Hércules • II Almirante Barroso • II Almirante AbreuDoubloons • III Vicente Guerrero • IV Córdoba • V La Argentina • VI Almirante Cochrane • VII Coronel Bolognesi • VII Nueve de JulioDoubloons • VIII Ignacio Allende • VIII Almirante GrauDoubloons • IX Santander • X San Martín