MIL-DTL-83723/27B
TABLE I. Material requirements. 1/
Requirement
Requirement
Material property
Unit
Method of test
type A
type B
Physical
In accordance with In accordance with
ASTM D876
Dimensions
Inches
tables II and III
tables II and III
Dimension recovery
275 min. expansion 200 min. expansion
See
Elastic Memory
Percent
requirements
93 min. retraction 90 min. expansion
Tensile strength
PSI
1200 minimum
1800 minimum
ASTM D412,
Die D
Ultimate elongation
Percent
250 minimum
300 minimum
Specific gravity
1.40 maximum
1.95 maximum
ASTM D792
Low-temperature
See
No cracking
No cracking
flexibility at -55°C (-67°F)
requirements
Heat shock (4 hours)
No dripping,
Not dripping,
See
Type A: 225°(437°F)
flowing or cracking flowing or cracking requirements
Type B: 300°C (572°F)
See
Heat aging (168 hours)
Type A: 175°C
requirements
Type B: 250°C
Followed by tests for:
1000 minimum
1200 minimum
Tensile strength
PSI
ASTM D412,
Elongation
Percent
Die D
200 minimum
250 minimum
38 ± 5
85 ± 5
Hardness
Shore D
ASTM D2240
Stiffness
PSI
10000 maximum
7500 maximum
ASTM D747
See footnote at end of table.
11
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