MIL-DTL-82655A
ASTM INTERNATIONAL
ASTM D 3663 Standard Test Method for Surface Area of Catalysts and Catalyst Carriers
(Copies of this document are available online at https://www.astm.org/ or from ASTM International
Customer Service, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959.)
2.4 Orde r of precedence. In the event of a conflict between the text of this document and the references
cited herein, the text of this document takes precedence. Nothing in this document, however, supersedes
applicable laws and regulations unless a specific exemption has been obtained.
3. REQUIREMENTS
3.1 Material. The material shall be ferric oxide in powder form.
3.2 Chemical and physical properties. The chemical and physical properties shall be in accordance
with Table I.
TABLE I. Chemical and physical properties.
Class 1
Class 2
Class 3
Property
Minimum
Maximum
Minimum
Maximum
Minimum
Maximum
-
-
-
Moisture, wt%
0.5
0.5
0.5
-
-
-
Calcination loss, wt% (dry basis)
2.0
2.0
2.0
-
-
-
Iron, as Fe2 O3, wt% (calcined
98.0
98.0
98.0
basis)
-
-
-
Acidity, as H2SO4, wt%
0.02
0.02
0.02
Specific Surface Area, m2/g
6.0
8.0
5.0
6.0
8.0
10.0
Typical Particle Shape
Acicular
Spheroid
Spheroid
3.3 Workmanship. The material shall be uniform, free from contamination, foreign material, or any
other defect that would prevent its use for the purpose intended.
4. VERIFICATION.
4.1 Classification of inspections. The inspection requirements specified herein are classified as follows.
a.
Conformance inspection (see 4.5).
4.2 Inspection conditions. Unless otherwise specified (see 6.2), all inspections shall be performed under
the following conditions:
a. Temperature: Room ambient 18 to 35°C (65 to 95°F)
b. Altitude: Normal ground
c. Vibration: None
2
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