CuZn42 (PNA378)
LAITON
Cu57-58.5 Zn reste Fe0.1-0.5 Pb0.03 max
| Chemical composition |
|---|
Cu57-58.5
Ni0.1-0.5
ZnBAL
Pb0.01 max
Sn0.1-0.5
Fe0.1-0.5
Mn0.1 max
Si0.1 max
| Alloy name | |
|---|---|
| RLSA no. | 343 |
| EN standard | CW510L |
| DIN standard | |
| UNS no.* | C28500 |
*Unified Numbering System (USA)
Characteristics and main uses
CuZn42 PNA 378 is a brass alloy with approximately 42% zinc, offering good mechanical properties. This brass is a two-phase alloy with around 50% hard and brittle beta phase, which enables chips to be broken during machining. This alloy is a good alternative to leaded brass. The addition of Fe iron to the composition, compared with CuZn42 and PNA380, reduces grain size. PNA 378 has a very low lead content, making the alloy suitable for REACH-compliant jewelry applications.
| Physical properties | Units | |
|---|---|---|
| Density (20°C) | 8,40 | Kg/dm³ |
| Melting point | 900 | °C |
| Longitudinal elasticity modulus | 105 | GPa |
| Thermal conductivity | W/m·K | |
| Electrical conductivity | m/Ω·mm² | |
| Electrical resistivity | µΩ·m | |
| Linear expansion Coefficient | 20,2 | 10⁻⁶·K⁻¹ |
| IACS (International Annealed Copper Standard) | 31 | % |
| Poisson's ratio | 0.377 |
| Capabilities | |
|---|---|
| Corrosion resistance | 3 |
| Hot deformation | 3 |
| Cold deformation | 4 |
| Electrodepositing | 2 |
| Diamond cutting | 2 |
| Nitriding | |
| Mechanical polishing | 2 |
| Welding without filler | |
| Brazing | 4 |
1 poor | 2 average | 3 good | 4 very good | - no info
