HSwMS Mjölner was a coastal destroyer of the Royal Swedish Navy, built by Eriksbergs Mekaniska Verkstad and launched on 9 April 1942 as the last of the four ship Mode class.

190 tonnes (190 long tons) of fuel was carried to give a range of 1,260 nautical miles (2,330 km; 1,450 mi) at 20 knots (37 km/h; 23 mph).

[3] The vessel was launched on 9 April 1942 and commissioned on 12 November 1943, serving with the Coastal Fleet through World War II.

In 1946, Mjölner accompanied Fylgia and Munin on a tour of Bergen and Fannefjord in Norway, Dublin in Ireland and Antwerp in Belgium.

A single Squid depth charge launcher was fitted to improve anti-submarine capabilities and the 40 mm (1.6 in) guns were upgraded.