1C005 Category 1C

“Superconductive” “composite” conductors in lengths exceeding 100 m or with a mass exceeding 100 g, as follows (see List of Items Controlled).

Category 1: Special Materials and Related Equipment, Chemicals, “Microorganisms,” and “Toxins”

Reasons for control

• NS: National security
• AT: Anti-terrorism

Country chart

List-based license exceptions

Items

1. a. “Superconductive” “composite” conductors containing one or more niobium-titanium 'filaments', having all of the following:
2. a.1. Embedded in a “matrix” other than a copper or copper-based mixed “matrix”; and
3. a.2. Having a cross-section area less than 0.28 × 10−4 mm 2 (6 µm in diameter for circular 'filaments');
4. b. “Superconductive” “composite” conductors consisting of one or more “superconductive” 'filaments' other than niobium-titanium, having all of the following:
5. b.1. A “critical temperature” at zero magnetic induction exceeding 9.85 K (−263.31 °C); and
6. b.2. Remaining in the “superconductive” state at a temperature of 4.2 K (−268.96 °C) when exposed to a magnetic field oriented in any direction perpendicular to the longitudinal axis of conductor and corresponding to a magnetic induction of 12 T with critical current density exceeding 1750 A/mm 2 on overall cross-section of the conductor.
7. c. “Superconductive” “composite” conductors consisting of one or more “superconductive” 'filaments' which remain “superconductive” above 115 K (−158.16 °C).

Related controls

N/A

Notes

Technical Note: For the purposes of 1C005, 'filaments' may be in wire, cylinder, film, tape or ribbon form.

Source: eCFR, version 2026-08-01, retrieved 2026-08-20T04:04:59+00:00.