MIL-PRF-47033B
Unless otherwise specified, the issues of documents not listed in the DoDISS are the issues
of the documents cited in the solicitation (see 6.2).
American Society for Testing and Materials (ASTM)
Glasses in Laboratory Apparatus, Standard
ASTM E 438
Specification for
Young's Modulus, Shear Modulus, and Poisson's
ASTM C 623
Ratio for Glass and Glass-Ceramics by Resonance,
Standard Test Method for
(Application for copies should be addressed to the American Society for Testing
and Materials, 1916 Race Street, Philadelphia, PA 19103.)
2.4 Order of precedence. In the event of a conflict between the text of this
document and the references cited herein, the text of this specification takes precedence.
Nothing in this specification, however, supersedes applicable laws and regulations unless a
specific exemption has been obtained.
3. REQUIREMENTS
3.1 First article. When required in the contractor purchase order, a sample shall be
subjected to first article inspection (see 4.2 and 6.2).
3.2 Item requirements. The material shall comply with ASTM E 438, Type I, Class
A, and the requirements specified herein.
3.3 Physical properties.
3.3.1 Modulus of elasticity. The modulus of elasticity shall be greater than 9.0 x
6
10 pounds per square inch.
3.3.2 Inclusions. The maximum inclusion diameter shall be 0.5 millimeters (mm).
Each cubic centimeter (cc) of glass shall not contain more than one maximum size
inclusion. The sum of inclusion diameters over 0.1 mm per cc of glass shall not exceed 0.5
mm.
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