Tungsten alloy with high density, high melting point, excellent hardness, high tensile strength, high temperature resistance and low vapor pressure is gradually standout among the various swaging rod making materials. What is more, tungsten alloy has superior wearing resistance, prolongs the life of tungsten alloy swaging rod. Tungsten alloy swaging rod is used for S-400.
The S-400 Triumf (NATO reporting name: SA-21 Growler), previously known as S-300PMU-3, is a new generation anti-aircraft weapon system developed by Russia's Almaz Central Design Bureau as an upgrade of the S-300 family. It is currently in limited service with the Russian Armed Forces.
The S-400 uses three different missiles to cover its entire performance envelope. These are the extremely long range 40N6, long range 48N6 and medium range 9M96 missile. Each one has different capabilities.
The development of the S-400 system began in the late 1990s. The system was formally announced by the Russian Air Force in January 1999. On 12 February 1999, the first tests were performed at Kapustin Yar in Astrakhan which were reported successful. As a result of this, the S-400 was scheduled for deployment in the Russian army in 2001.
In 2003 it first became apparent that the system was not ready for deployment, but in August two high-ranking military officials expressed concerns that the S-400 was being tested using 'obsolete' interceptors from the S-300P and concluded that it was not ready for production.
Finally the completion of the project was announced in February 2004. In April, a ballistic missile was successfully intercepted in a test of the upgraded 48N6DM interceptor missile.