MIL-DTL-29606A
TABLE I. Conductor strand material and coating.
Application ASTM
Designator
Strand material
Coating
or ANSI standard
SCC
Annealed copper
Silver
ASTM-B298
SCC1
Annealed copper
Silver
ASTM-B298
ASTM-B961
SCA
High strength copper alloy 1/
Silver
ASTM B298
ASTM-B624
SCA1
High strength copper alloy 1/
Silver
ASTM B298
ASTM-B624
ASTM-B961
SCU
Ultra-high strength copper alloy 1/
Silver
None
NCC
Annealed copper
Nickel
ASTM-B355
NCA
High strength copper alloy 1/
Nickel
ATSM-B624
NCU
Ultra-high strength copper alloy 1/
Nickel
None
NHC
Annealed copper
Nickel (27%)
ASTM-B355
NHA
High strength copper alloy 1/
Nickel (27%)
ASTM-B624
TCC
Annealed copper
Tin
ASTM-B965
ALU
Aluminum 1350-H19 (extra hard)
None
ASTM-B230/230M
KPH
Special limits
None
ANSI-MC96.1
Type K - thermocouple extension
nickel/chromium (positive leg)
KPS
Special limits
None
ANSI-MC96.1
Type K - thermocouple extension
nickel/chromium (positive leg)
KNH
Special limits
None
ANSI-MC96.1
Type K - thermocouple extension
nickel/chromium (negative leg)
KNS
Special limits
None
ANSI-MC96.1
Type K - thermocouple extension
nickel/chromium (negative leg)
1/ High strength and ultra-high strength copper alloy conductors have a higher conductor
resistance (lower conductivity) than annealed copper conductors of the same size.
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