1C116Maraging steels, useable in 'missiles', having all of the following:

N.B. SEE ALSO 1C216.
a. Having an ultimate tensile strength, measured at 293 K (20 °C), equal to or greater than:
1. 0,9 GPa in the solution annealed stage; or
2. 1,5 GPa in the precipitation hardened stage; and
b. Any of the following forms:
1. Sheet, plate or tubing with a wall or plate thickness equal to or less than 5,0 mm;
2. Tubular forms with a wall thickness equal to or less than 50 mm and having an inner diameter equal to or greater than 270 mm.
Technical Note 1:
Maraging steels are iron alloys:
1. Generally characterised by high nickel content, carbon content of less than or equal to 0,03 % by weight, and the use of substitutional elements or precipitates to produce strengthening and age-hardening of the alloy;
and
2. Subjected to heat treatment cycles to facilitate the martensitic transformation process (solution annealed stage) and subsequently age hardened (precipitation hardened stage).
Technical Note 2:
In 1C116 'missile' means complete rocket systems and unmanned aerial vehicle systems capable of a range exceeding 300 km.