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|  MIL-T-50777A(OS)
3.2.1 Flattening. The tubing shall withstand, without cracking, the flattening test of 4.3.3.
TABLE I. Chemical composition.
Element
Percent, minimum Percent, maximum
Titanium
-
0.15
Copper
3.80
4.90
Magnesium
1.20
1.80
Silicon
-
0.50
Chromium
-
0.10
Iron
-
0.50
Manganese
0.30
0.90
Zinc
-
0.25
Others, each
-
0.05
Others, total
-
0.15
Aluminum
Remainder
TABLE II. Elongation requirements.
Temper
Wall thickness, inch
Elongation, in 2 inches
(minimum percent)
T3 - Solution heat treated
Dia. 1/2 to 2 inches
and then cold reworked
0.050 to 0.259
14
0.260 to 0.500
16
Dia. greater than 2 inches
to 8 inches
0.050 to 0.259
10
0.260 to 0.500
12
3.2.2 Test for leaks. Each length of round tube shall be tested as specified in either 3.2.2.1
or 3.2.2.2 (at the option of the producer), consistent with the size limitations indicated for
each method.
3
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