Naval Air Warfare Center AD, Contracts Dept. Code 233, Bldg 129-2, Lakehurst, NJ 08733-5083.

17 -- BARREL ASSY KIT SOL N68335-97-R-0255 DUE 070997 POC June Manganello Contract Specialist Code 213JM, (908) 323-2735. Titanium Barrel Assembly Kits, basic quantity 7 each, option year quantities- year 1 (4 each), year 2 (2 each) and year 3 (5 each) with each kit to include the following items: Titanium barrel (2 each) with blanking plate (2 each); inconel screw (24 each) with washer ( 24 each); inconel pins (16 each) with washer (48 each) & nut (16 each); inconel screw (20 each) without washer; inconel stud (4 each) with nut (4 each). The contractor shall test one unit to ensure form, fit and functional testing prior to release for production. The contractor will have to possess extensive knowledge of and prior experience with machining of titanium alloys because this material is extremely difficult to machine. The critical manufacturing processes to finish machining are heat treating, extruding, and/or forging. Since the statement of work only specifies the required mechanical properties of the finished part, and not any particular method of accomplishing these processes, susscessful manufacture will be highly dependent on the contractor's knowledge of and prior experience with these specialized difficult processes. Material Description: Titanium alloy, 3AL-8V-6Cr-4Mo4Zr. Furnished in the solution treated and aged condition, minimum yield strength is 140 KSI at 300 degree F, minimum fracture toughness is 85 KSI IN at 300 degrees F. Geometry description: Barrel is one piece construction, no welding is allowed. Barrel length is 75 inches. Basic cross section is a cylinder with a 9.62 inch inside diameter and 11.12 inch outside diameter. Both ends of the barrel are flanged. Maximum diameter of flanged ends is 14.50 inches. Length of flanged portion is approximately 1.75 inches. At four places longitudinally along the barrel, pairs of lugs protrude approximately 3 inches beyond the outside of the barrel. Envelope dimensions (finished part): 14.50 X 15.75 X 75 inches. Barrel weight is approximately 400 pounds. Major characteristics:+.001/-.001 inch tolerance required on pin hole locations: 32 RMS finish required on radii at forward lug. Dye penetrant and ultrasonic inspections required. Tensile, fracture toughness and axial fatique tests are required. 10.00-8 UNS-2B internal thread is required on aft end of barrel for installation of blanking plate. Quality System: Manufacturers quality system must meet requirements of ANSI/ASQC-Q9002. The point of contact is June Manganello at (908) 323-2735 or Facsimile (908) 323-2165. Non-setaside- unrestricted. Request copies in writing or by facsimile (908) 323-2165. (0141)

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