"Fibrous or filamentary materials", and prepregs, as follows: a. Carbon or aramid "fibrous or filamentary materials" having either of the following characteristics: 1. A ´specific modulus´ of 12.7 x 10 6 m or greater; or 2. A ´specific tensile strength´ of 23.5 x 10 4 m or greater; b. Glass "fibrous or filamentary materials" having both of the following characteristics: 1. A ´specific modulus´ of 3.18 x 10 6 m or greater; and 2. A ´specific tensile strength´ of 7.62 x 10 4 m or greater; c. Thermoset resin impregnated continuous "yarns", "rovings", "tows" or "tapes" with a width of 15 mm or less (prepregs), made from carbon or glass "fibrous or filamentary materials" specified in Item 2.C.7.a. or Item 2.C.7.b.

LIST OF NUCLEAR-RELATED DUAL-USE EQUIPMENT, MATERIALS, SOFTWARE, AND RELATED TECHNOLOGY

2.C. Materials

INFCIRC/254/Rev.8/Part 2

Note: Item 2.C.7.a. does not control aramid "fibrous or filamentary materials" having 0.25% or more by weight of an ester based fiber surface modifier. Technical Note: The resin forms the matrix of the composite. Technical Notes: 1. In Item 2.C.7. ´Specific modulus´ is the Young´s modulus in N/m 2 divided by the specific weight in N/m 3 when measured at a temperature of 296 ± 2 K (23 ± 2 °C) and a relative humidity of 50 ± 5%. 2. In Item 2.C.7. ´Specific tensile strength´ is the ultimate tensile strength in N/m 2 divided by the specific weight in N/m 3 when measured at a temperature of 296 ± 2 K (23 ± 2 °C) and a relative humidity of 50 ± 5%.