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High Conductivity and Higher Softening Resistance Copper Alloy KFC™

CDA No. 19210
Copper alloy with excellent softening resistance than C14415. (Cu-0.15%.Sn)

KFC™ has small amount of iron and phosphorus in chemical compositions, and is hardened by Fe2P precipitates in copper matrix.

Good Points

  1. Has excellent electrical and thermal conductivity.
  2. Has higher strength than pure copper and C14415.
  3. Has higher softening temperature above 400 degree, and higher than C14415.
  4. Has good bare bondability.
  5. Has good stamping formability and etching formability.
  6. Has good solderability and platability. It maybe reduce the protrusions by the silver plating.

Nominal Compositions

Cu-0.1Fe-0.03P (mass %)


Fig. Softening resistance of KFC
Fig. Softening Resistance of KFC™

1. Physical Properties

Specific Gravity 8.9
Coefficient of Thermal Expansion
17.5 x 10-6/K
Thermal Conductivity (293K) 364 W/m.K
Electrical Resistivity (293K) 18.2 nΩ .m
Electrical Conductivity (293K) 90 %IACS
Modulus Elasticity (293K) 125 GPa

* The above are typical characteristics.

2. Mechanical Properties

Temper Tensile Strength


Vickers Hardness
MHv: 4.9N
O 275~345 30 min -
1/4H 295~370 15 min 85~110
1/2H 350~430 4 min 100~130
H 390~470 2 min 120~145

* The above tensile strength and hardness are our standard specifications. We will adjust these specifications by your requests.

3. 90°V-type Bend-formability (MBR)

Temper Good Way Bad Way
1/2H 0 0
H 0 0

* The above are typical characteristics.
The value slightly varies depending on the thickness of specimens.


Leadframe for Transistor, Leadframe for LED, Heat sink for IGBT, Heat spreader, Heat spreader for BGA, Inner-frame for Heat spreader etc.


Not used cadmium (Cd), lead (Pb), mercury (Hg), six value chrome (Cr+6), polybrominated biphenyl (PBB), Polybrominated biphenyl ether (PBDE) restricted with RoHS etc.


Kobe Steel, Ltd. Advanced Materials Business

Copper Rolled Products Unit

Copper Flat Rolled Products Sales Department