MIL-STD-1276H
5. DETAILED REQUIREMENTS
5.1 Composition. The specified lead composition (see 1.2.1.3) shall be homogeneous and conform to the requirements of the applicable documents and table as follows:
A - Copper-iron-phosphorus-zinc alloy (194 alloy): ASTM 8465 (see 5.2.1.4).
8 - Copper-iron-phosphorus-cobalt-tin alloy (195 alloy), 97 percent Cu, 1.5 percent Fe, 0.1 percent P, 0.8 percent Co, and 0.6 percent Sn (see 5.2.1.4).
C - Copper (oxygen free): ASTM 8170, grade 1 or grade 2. D - Copper-clad nickel-iron alloy (Dumet): ASTM F29.
E - Copper-nickel-tin alloy (725 alloy), 88.2 percent Cu, 9.5 percent Ni, and 2.3 percent Sn: ASTM
F - Iron-nickel alloy (52 alloy): ASTM F30 (see 5.2.1.2). G - Iron-nickel alloy (42 alloy): ASTM F30 (see 5.2.1.2).
H - Copper-aluminum-silicon-cobalt alloy (638 alloy), 95.0 percent Cu, 2.8 percent Al, 1.8 percent Si, and
0.4 percent Co.
J - Copper-zinc-aluminum-cobalt alloy (688 alloy): ASTM 8592 (see 5.2.1.4). K - Iron-nickel-cobalt alloy: ASTM F15 (see 5.2.1.2).
L - Copper, Electrolytic tough - pitch: ASTM 85.
M - Steel, nickel clad, 8 percent nickel, clad by weight.
N - Nickel: See table III for ribbon leads or for round-wire leads.
W - Steel, copper-clad: ASTM 8452 (except that the percent of conductivity shall be a minimum of 16 percent.)
X - Other composition as specified in the acquisition document (see 5.2.1.4).
TA8LE III - Chemical composition
Ribbon leads |
Round wire leads |
||
Element |
Percent 1/ |
Element |
Percent 1/ |
Nickel 2/ |
99.0 min. |
Nickel 2/ Iron Copper Manganese Carbon Silicon Sulfur |
99.0 min. 0.30 0.20 0.35 0.15 0.20 0.008 |
Others, total Iron Copper Manganese Carbon Silicon Sulfur |
1.00 0.30 0.20 0.35 0.15 0.20 0.008 |
1/ Unless otherwise indicated, maximum allowable. Total not to exceed
100 percent.
2/ Cobalt counting as nickel.
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