Hyper Eco Alloy NKB083

NKB083 Electric conductivity 40%IACS、Equivalent mechanical strength with brass alloys', Excellent bend formability



Hyper Eco Alloys, Cu-Zn alloys, have higher conductivity which a conventional brass C2600 could not materialize. Our unique "Hyper Processing Technologies" and optimization of chemical compositions enable Hyper Eco Alloys provide comparable mechanical strength, spring property and bend formability to brass C2600. Moreover, stress corrosion cracking resistance, stress relaxation resistance and soldrability, which of a conventional brass C2600 could not reach customers' satisfying levels, are highly improved in Hyper Eco Alloys.
The name of Hyper Eco Alloys is an acronymderived for High Electrical Conductivity, and also is derived from Economy & Ecology since the alloys are more easily recycled than brass.

Figures in parentheses are representing values.

Table 1. Chemical Composition of NKB083 (%)

  Cu Zn Sn
Typical Balance 8.0 0.3

Table 2.Physical Properties of NKB083

Electric conductivity 41 %IACS(@20℃)
Specific resistance 42.1 nΩ ・ m(@20℃)
Thermal conductivity 173 W/mK
Specific heat 353 J/kg・K(@20℃)
Thermal expansion coefficient 18.9 ×10-6/K(20 to 300℃)
Young's modulus 111 GPa
Density 8.81 g/cm3

The NKB alloys have higher electrical conductivity than C2600. Three types of alloy with electrical
conductivities of 40%, 50% and 60% respectively are available.

Table 3. Mechanical Properties of NKB083 (Typical)

Temper Tensile Strength
0.2% offset Yield Strength
Vickers Hardness
1/2H 410 400 10 128
H 490 485 5.0 153
EH 570 565 3.0 178