A bill to authorize the disposal of up to 45,000 long tons of tin from the national stockpile and the supplemental stockpile and to utilize a portion of such tin, or the proceeds from the sale thereof, to obtain up to 225,000 short tons of copper for the national stockpile, and for other purposes.

Authorizes the Administrator of the General Services to dispose of up to 45,000 long tons of tin presently held in the national and supplemental stockpiles.

Stipulates that: (1) up to 26,000 long tons of such tin, or the proceeds from the sale thereof, shall be used to obtain up to 225,000 short tons of copper; (2) the proceeds from the sale of the first 5,000 long tons of tin sold pursuant in this Act in fiscal year 1978 and the proceeds from the sale of the first 10,000 long tons of such tin sold in fiscal year 1979 shall be covered into the Treasury as miscellaneous receipts; and (3) 4,000 long tons of such tin, or the proceeds from the sale thereof shall be used to acquire strategic and critical materials which are needed on a priority basis.

Authorizes the Administrator to use any quantity of tungsten or the proceeds from the sale thereof, which is available for disposal to aid in the acquisition of the 225,000 short tons of copper (except that the proceeds from the sale of the first 3,000,000 pounds of tungsten for each of the fiscal years 1978 and 1979 may not be used for such purpose).

Stipulates that the copper acquired pursuant to this Act shall be placed in the national stockpile.