KLF-5 CDA No. 50715

KFC-5 is copper alloy containing a small amount of Fe and P and 2% of Sn.

The base material is low tin phosphor bronze which can be hot rolled with a small amount of Fe and P compounds precipitated and dispersed to achieve high strength and high electrical conductivity, and high cost performance.

Features

1.        Heat resistance temperature approximately 1000K higher than phosphor bronze.

2.        Electrical conductivity 40%-50% better than phosphor bronze.

3.        Excellent solderability and platability.

4.        Better resistance to stress corrosion cracking than phosphor bronze.

5.        Excellent resistance to stress relaxation.

6.        Strength equivalent to phosphor bronze.

Chemical Composition

       Cu: Residual, Sn: 1.8-2.2, Fe: 0.05-0.15, P: 0.025-0.040

Physical Properties

Specific

Gravity

Thermal Expansion Coefficient

(293-725K)

Thermal Conductivity

(293K)

Volume Resistivity

(293K)

Electrical Conductivity

Longitudinal Elasticity Coefficient

8.9 g/cm3

17.6x10-6/K

1.34x102 W/mK

4.9 uohm.cm

35% IACS

1.21x105 N/mm2

Mechanical Properties

Temper

Grade

Tensile Strength

(N/mm2)

Elongation

(%)

Vickers Hardness

(For reference)

Electrical Conductivity

(%IACS)

(For reference)

1/2H

min 390

min 10

min 150

min 30

H

min 540

min 7

min 180

min 30

Product Range (Unit: mm)

Shape

Thickness

Width

Length

Unit Weight

(kg/1mm width)

Plate

0.1-6.0

max 500

max 1600

-

Strip

0.1-2.5

6-500

-

4

Note: (1) The spool diameter range from 150 mm to 500 mm in increments of 50mm.

        (2) The coil spool is also available in resin and steel.

        (3) Strip with Tin plating is also available, however, only in width less than 300 mm.

        

Uses

       IC leadframes, terminals, various electrical components.

 

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