C24000 Composition
C24000 brass is also known as Low Leaded Brass, and it is composed
of 76% copper (Cu), 23% zinc (Zn), and 0.5% lead (Pb). The addition
of lead in this alloy improves its machinability, formability, and
corrosion resistance. However, it should be noted that lead is a
toxic substance, and proper safety measures should be followed when
handling and processing C24000 brass.
| Element | Content (%) |
|---|
| Cu | 80 |
| Zn | 20 |
C24000 Physical Properties
C24000 brass has a density of 8.6 g/cm3 and a melting point of
888°C (1630°F). It has a reddish-gold colour and a shiny surface
when polished. C24000 brass is a non-magnetic alloy with good
electrical and thermal conductivity, making it suitable for
electrical contacts and heat exchangers.
| Properties | Metric | Imperial |
|---|
| Density | 8.66 g/cm3 | 0.313 lb/in3 |
| Melting point – liquidus | 999°C | 1830°F |
| Melting point – solidus | 966°C | 1770°F |
C24000 Mechanical Properties
C24000 brass has good ductility, so it can be easily shaped,
stretched, and hammered into various shapes and sizes. It has a low
tensile strength of 360 MPa (52,000 psi) and a low yield strength
of 170 MPa (25,000 psi). The elastic modulus of C24000 brass is 101
GPa (14.7 x 106 psi), with an elongation of 42% in 50 mm.
| Properties | Metric | Imperial |
|---|
| Poisson’s ratio | 0.34 | 0.34 |
| Elastic modulus | 117 GPa | 17000 ksi |
C24000 Equivalents
- ASTM B134
- ASTM B36
- QQ W321
- SAE J461
- SAE J463
C24000 Application
C24000 brass has many applications, including architectural
hardware, valve stems, decorative accessories, plumbing fixtures,
musical instruments, and ammunition cartridges. The lead content in
C24000 brass makes it suitable for low-pressure plumbing
applications, as it reduces the risk of dezincification. It is also
used in marine applications due to its good corrosion resistance.
C24000 Hardness
C24000 brass has a Brinell hardness of 82 HB, which is relatively
low compared to other brass alloys. However, it can be
work-hardened by cold deformation, which improves its mechanical
strength and spring properties.
C24000 Brass Heat Treatment and Welding
C24000 brass is not heat-treatable, so heating or cooling cannot
significantly alter its mechanical properties. It can be welded by
brazing, soldering, or gas tungsten arc welding (GTAW). The choice
of welding method depends on the application and the type of joint
required.
C24000 Brass Corrosion Resistance
C24000 brass has good corrosion resistance in most environments,
including freshwater, seawater, and atmospheric conditions.
However, it may be significantly susceptible to dezincification in
high-pH or low-oxygen environments if the lead content is reduced.
Proper alloy selection and maintenance are essential to ensure the
longevity and performance of C24000 brass products.
Conclusion
C24000 brass is a versatile and widely used alloy with good
mechanical properties, electrical conductivity, and corrosion
resistance. Its composition, physical and mechanical properties,
use, and processing characteristics make it suitable for various
industrial applications. Understanding the properties and
limitations of C24000 brass is essential to make informed decisions
about its selection, processing, and maintenance and to ensure its
performance and reliability.
