Copper Zinc Alloys
Reference data and engineering information about copper zinc alloys for acoustics applications.
Overview
Engineering reference data for Copper Zinc Alloys in acoustics.
Key Formulas
Speed of Sound
Speed of sound in an ideal gas.
Sound Level
Decibel level.
Wavelength
Wavelength = speed / frequency.
Variables
| Symbol | Description | Unit |
|---|---|---|
| Speed of sound | m/s | |
| Sound level | dB | |
| Wavelength | m | |
| Frequency | Hz |
Tensile Strength Data for Copper-Zinc-Tin Alloys
The mechanical properties of ternary copper-zinc-tin alloys vary significantly with composition. The following table summarizes tensile strength data for different alloy blends.
Copper(%) | Zinc(%) | Tin(%) | Tensile Strength(10⁵ kPa) | Tensile Strength(psi) |
|---|---|---|---|---|
| 45 | 50 | 5 | 1.03 | 15000 |
| 50 | 45 | 5 | 3.45 | 50000 |
| 50 | 40 | 10 | 1.03 | 15000 |
| 55 | 43 | 2 | 4.48 | 65000 |
| 55 | 40 | 5 | 4.27 | 62000 |
| 55 | 35 | 10 | 2.24 | 32500 |
| 55 | 30 | 15 | 1.03 | 15000 |
| 60 | 37 | 3 | 4.14 | 60000 |
| 60 | 35 | 5 | 3.62 | 52500 |
| 60 | 30 | 10 | 2.76 | 40000 |
| 60 | 20 | 20 | 0.69 | 10000 |
| 65 | 30 | 5 | 3.45 | 50000 |
| 65 | 25 | 10 | 2.9 | 42000 |
| 65 | 20 | 15 | 2.1 | 30000 |
| 65 | 15 | 20 | 1.24 | 18000 |
| 65 | 10 | 25 | 0.83 | 12000 |
| 70 | 25 | 5 | 3.1 | 45000 |
| 70 | 20 | 10 | 3.03 | 44000 |
| 70 | 15 | 15 | 2.55 | 37000 |
| 70 | 10 | 20 | 2.1 | 30000 |
| 75 | 20 | 5 | 3.1 | 45000 |
| 75 | 15 | 10 | 3.1 | 45000 |
| 75 | 10 | 15 | 2.96 | 43000 |
| 75 | 5 | 20 | 2.8 | 41000 |
| 80 | 15 | 5 | 3.1 | 45000 |
| 80 | 10 | 10 | 3.1 | 45000 |
| 80 | 5 | 15 | 3.3 | 47500 |
| 85 | 10 | 5 | 3 | 43500 |
| 85 | 5 | 10 | 3.2 | 46500 |
| 90 | 5 | 5 | 2.9 | 42000 |
Source: engineeringtoolbox.com
Key Observation: The data shows that tensile strength does not scale linearly with copper content. For instance, a 55% Cu, 43% Zn, 2% Sn alloy achieves a peak strength of 65,000 psi (4.48 × 10⁵ kPa), while higher or lower copper concentrations result in reduced strength. This highlights the critical importance of precise compositional control in alloy design.