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Cancellation Notice 2, April 30, 1998

Cancellation Notice 2 Only


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Description / Abstract:

This standard establishes a Government grading system, interchangeability data with commercial grades, intended uses, and physical properties ranges for eight common grades of cemented carbides used in the manufacture of metal cutting tools, tool bits, blanks and inserts. The Government grading system described herein covers cemented carbides similar, or equal, to those known in the industry as grades C-1, C-2, C-3, C-4, C-5, C-6, C-7, and C-8. This standard is intended to cover carbides used for metal cutting tool applications only and does not cover carbides used for drawing, stamping and swaging dies, gauges, jig bushings, centers, rolls, knives, shear-blades, and similar non-machining applications.

This standard is not intended to cover the more recently developed cemented carbide products such as coated cemented titanium carbide, ceramic, ceramet, or submicron carbides and is not intended to restrict or inhibit commercial development or Government purchase of the newer grades of carbide products. If a Government agency requires and can justify purchase and use of the newer grades of carbide tooling, they should purchase the needed tooling in accordance with the procurement regulations of their agency.

This standard covers cemented carbide products of the following Government grades. The Government grade required for specific procurements will be stated in the invitation for bids of request for proposals, and in the contract or order. Descriptions of the various grades are stated in tables I, II, and III herein.
     Grade X-1
     Grade X-2
     Grade X-3
     Grade X-4
     Grade X-5
     Grade X-6
     Grade X-7
     Grade X-8