1964_IMPORT_AND_EXPORT_(STRATEGIC_COMMODITIES)_REGULATIONS — Page 11

1988 Ed.]

Import and Export (Strategic Commodities) Regulations

[CAP. 60

GII

[Subsidiary]

C6

IL 1001

Frequency changers (converters or invertors) specially designed or prepared to supply motor stators for gas centrifuge enrichment, having all of the following characteristics, and specially designed components therefor:

(a) A multiphase output of 600 Hz to 2 kHz:

(b) Frequency control better than 0.1 per cent;

(c) Harmonic distortion of less than 2 per cent; and

(d) An efficiency greater than 80 per cent.

(See also Item B1 on this List.)

INDUSTRIAL LIST

GROUP A

METAL-WORKING MACHINERY

Technology for metal-working manufacturing/processes and specially designed "software", as follows---

I. Definitions of terms used in this Item-

(a) "Hot die forging" is a deformation process where die temperatures are at the same nominal temperature as the workpiece and exceed 850K (577°C, 1070°F);

(b) "Superplastic forming" is a deformation process using heat for metals that are normally characterised by low values of elongation (less than 20 per cent) at the breaking point as determined at room temperature by conventional tensile strength-testing, in order to achieve elongations during processing which are at least 2 times those values;

(c) "Diffusion bonding" is a solid-state molecular joining of at least two separate metals into a single piece with a joint strength equivalent to that of the weakest material;

(d) "Metal powder compaction" is a process capable of yielding parts having a density of 98 per cent or more of the theoretical maximum density;

(e) "Direct-acting hydraulic pressing" is a deformation process which uses a fluid-filled flexible bladder in direct contact with the workpiece;

(f) "Hot isostatic densification" is a process of pressurizing a casting at temperatures exceeding 375K (102°C, 215.6°F) in a closed cavity through various media (gas, liquid, solid particles, etc.) to create equal force in all directions to reduce or eliminate internal voids in the casting:

(g) "Vacuum hot pressing" is a process which uses a press with heated dies to consolidate metal powder under reduced atmospheric pressure into a part;

(h) "High pressure extrusion" is a process yielding a single-pass reduction ratio of 4 to 1 or greater in a cross-sectional area of the resulting part;

(i) "Isostatic pressing" is a process which uses a pressurizing medium (gas, liquid, solid particles, etc) in a closed cavity to create equal force in all directions upon a metal powder-filled container for consolidating the powder into a part.

II. Listed as follows-

(a) Technology for the design of tools, dies and fixtures specially designed for the following processes---

(1) "Hot die forging";

(2) "Superplastic forming";

(3) "Diffusion bonding";

(4) "Metal powder compaction" using-

(i) "Vacuum hot pressing";

(ii) "High-Pressure extrusion"; or

(iii) "Isostatic pressing";

(5) "Direct-acting hydraulic pressing";