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Titanium Past, Present, and Future (1983) / Chapter Skim
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Apendix H: Titanium Sponge Specifications
Pages 197-200

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From page 197...
... S National Stockpile Purchase specification P-97-~7 June 2, 1982 (supersedes P-97-R6, October l9, 1977~: This specification covers titanium metal sponge in the form and quality satisfactory for stockpiling and intended industrial uses.
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From page 198...
... However, no batch having a Brinell hardness more than 10 points above the maximum allowable for the lot shall be used in blending for that lot . The method of measurement shall be in accordance wi th ASTM Method E10, Test for Brinell Hardness of Metallic Materials, using a lO~m ball, 1500-kg f load in the 100 to 200 Bhn range and a 500-kg f load in the under 95 Bhn range and a 30-s dwell.
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From page 199...
... This virgin metal is commonly designated as sponge titanium because of its porous, spongelike texture. Manufacture Sponge titanium is usually prepared by reduction of titanium tetrachloride and gets its spongelike character from the processes involved in production.
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From page 200...
... Methods of Chemical Analysis The methods of analysis shall be in accordance with ASTM Methods E 120, Chemical Analysis of Titanium and Titanium Alloys, or as agreed upon by the manufacturer and the purchaser. Hardness The Brinell hardness of a lot shall be the average of the hardness determinations made on the solid samples prepared as described in Section 4 and the hardness value shall not exceed 120 HB.
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Key Terms

  • inert gas
  • gas sweep
  • titanium metal
  • metallic materials
  • bhn range

  • hardness determinations
  • virgin titanium
  • chemical analysis
  • sponge titanium
  • specification covers

  • astm method
  • usually prepared
  • solid samples
  • obtain samples
  • physical requirements

  • contains section
  • identif ication
  • evaluation sample
  • stockpile purchase
  • gray color

  • spongelike texture
  • acid leaching
  • hardness locations
  • element percent
  • samples weighing

  • astm methods
  • owish hues
  • consumable electrodes
  • weighing approximately
  • machined surfaces


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