The United Kingdom built all four ships which were originally armed with nine Sea Cat anti-air missiles and five Sea Killer anti-ship missiles. Iranian Navy has replaced the missiles with Chinese equivalents.
One Alvand-class frigate, the Sahand, was sunk by U.S. forces during Operation Praying Mantis in 1988 after unsuccessfully firing upon an A-6 Intruder flying from the USS Enterprise. It was then struck by Harpoon missiles from this aircraft, and then a coordinated Harpoon attack from its wingman and a nearby surface ship.
|Alvand - ex-Saam||71 (ex- DE 12)||Vosper Thornycroft||1968||In Service|
|Alborz - ex-Zaal||72 (ex DE 14)||Vickers||1969||In Service|
|Sabalan- ex-Rostam||73 (ex DE 16)||Vickers||1969||In Service|
|Sahand - ex-Faramarz||74 (ex DE 18)||Vosper Thornycroft||1969||sunk on April 18, 1988|