MIL-B-13501D (MI)
Table I. Chemical requirements (percent).
COMPOSITION
COPPER
TIN
LEAD
ZINC
IRON MAX
PHOSPHORUS
TOTAL OTHER ELEMENTS MAX
A
88.0 - 92.0 *
0.25 - 0.75 *
-
Remainder
0.1
-
0.2
B
Remainder
3.5 - 4.5 *
3.5 - 4.5 *
1.5 - 4.0 *
0.1
-
0.2
C
Remainder
3.5 - 5.8 *
0.05 max
0.3 max
0.1
0.03 - 0.35 *
-
* See 3.2.1
3
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