Hyper Eco Alloy NKB032

NKB032 Electric conductivity 60%IACS、Equivalent mechanical strength with brass alloys', Excellent bend formabilityy



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.
NKB032 meets JC200 of Japanese Automobile Standards Organization (JASO D620).
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 NKB032(%)

  Cu Zn Sn
Typical Balance 3.0 0.2

Table 2.Physical Properties of NKB032

Electric conductivity 60 %IACS(@20℃)
Specific resistance 28.7 nΩ ・ m(@20℃)
Thermal conductivity 245 W/mK
Specific heat J/kg・K(@20℃)
Thermal expansion coefficient 17.1 ×10-6/K(20 to 300℃)
Young's modulus 111 GPa
Density 8.91 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 NKB032 (Typical)

Temper Tensile Strength
0.2% offset Yield Strength
Vickers Hardness
H 490 485 4.0 153