Document ID: chunk:federal_register_of_legislation:F2024L01024:front:0:p72
Version: federal_register_of_legislation:F2024L01024
Segment Type: other
Provision Reference: 
Character Range: 207369–210224

than 14 x 106 N/m2;
d. Planar absorbers made of sintered ferrite, having all of the following:
1. A specific gravity exceeding 4.4; and
2. A maximum operating temperature of 548 K (275°C);
e. Planar absorbers having no magnetic loss and fabricated from 'open‑cell foam' plastic material with a density of 0.15 grams/cm3 or less.

                   Technical Note:
                   For the purposes of 1C001.a. Note e., 'open-cell foams' are flexible and porous materials, having an inner structure open to the atmosphere. 'Open-cell foams' are also known as reticulated foams.
Note 2: Nothing in Note 1 to 1C001.a. releases magnetic materials to provide absorption when contained in paint.
1 C. 001. b. Materials not transparent to visible light and specially designed for absorbing near‑infrared radiation having a wavelength exceeding 810 nm but less than 2000 nm (frequencies exceeding 150 THz but less than 370 THz);
Note: 1C001.b. does not apply to materials, specially designed or formulated for any of the following applications:
a. "Laser" marking of polymers; or
b. "Laser" welding of polymers.
1 C. 001. c. Intrinsically conductive polymeric materials with a 'bulk electrical conductivity' exceeding 10,000 S/m (Siemens per metre) or a 'sheet (surface) resistivity' of less than 100 ohms/square, based on any of the following polymers:
1. Polyaniline;
2. Polypyrrole;
3. Polythiophene;
4. Poly phenylene‑vinylene; or
5. Poly thienylene‑vinylene.
Technical Note:
For the purposes of 1C001.c., 'bulk electrical conductivity' and 'sheet (surface) resistivity' should be determined using ASTM D-257 or national equivalents.
Note: 1C001.c. does not apply to materials in a liquid form.
1. C. 002. Metal alloys, metal alloy powder and alloyed materials, as follows:
N.B.: SEE ALSO 1C202.
            1. Note: 1C002 does not apply to metal alloys, metal alloy powder and alloyed materials, specially formulated for coating purposes.
Technical Notes:
       For the purposes of 1C002., metal alloys are those containing a higher percentage by weight of the stated metal than of any other element.
1. C. 002. a. Aluminides, as follows:
1. Nickel aluminides containing a minimum of 15% by weight aluminium, a maximum of 38% by weight aluminium and at least one additional alloying element;
2. Titanium aluminides containing 10% by weight or more aluminium and at least one additional alloying element;
1. C. 002. b. Metal alloys, as follows, made from the powder or particulate material specified by 1C002.c.:
1. Nickel alloys having any of the following:
a. A 'stress‑rupture life' of 10,000 hours or longer at 923 K (650°C) at a stress of 676 MPa; or
b. A 'low cycle fatigue life' of 10,000 cycles or more at 823 K (550° C) at a maximum stress of 1,095 MPa;
2. Niobium alloys having any of the following:
a. A 'stress‑rupture life' of 10,000 hours or