1C216Maraging steel, other than that specified in 1C116, 'capable of' an ultimate tensile strength of 1 950 MPa or more, at 293 K (20 °C).

Note:
1C216 does not control forms in which all linear dimensions are 75 mm or less.
Technical Note:
The phrase maraging steel 'capable of' encompasses maraging steel before or after heat treatment.
1C225
Boron enriched in the boron-10 (10B) isotope to greater than its natural isotopic abundance, as follows: elemental boron, compounds, mixtures containing boron, manufactures thereof, waste or scrap of any of the foregoing.
Note:
In 1C225 mixtures containing boron include boron loaded materials.
Technical Note:
The natural isotopic abundance of boron-10 is approximately 18,5 weight per cent (20 atom per cent).
1C226
Tungsten, tungsten carbide, and alloys containing more than 90 % tungsten by weight, other than that specified in 1C117, having both of the following characteristics:
a. In forms with a hollow cylindrical symmetry (including cylinder segments) with an inside diameter between 100 mm and 300 mm; and
b. A mass greater than 20 kg.
Note:
1C226 does not control manufactures specially designed as weights or gamma-ray collimators.