Introduce CuZn38Pb2
The CuZn38Pn2 is a brass alloy containing 61 % copper and 2 % lead.
This alloy is composed of a heterogeneous biphasic structure consisting of alpha (α) and beta (β') phases, the α phase is face-centered cubic and the β' phase is cubic-centered.
The CuZn38Pb2 presents good machinability combined with excellent cold and hot formability, making this alloy suitable for bending, riveting, and upsetting.
This alloy has a good resistance to organic acids and neutral and alkaline compounds.
Nevertheless, in the cold rolling temper and under internal /external stress, it has a poor resistance to acids and ammonia and is therefore susceptible to stress corrosion cracking. Stress corrosion cracking can be largely controlled by stress relief annealing treatment (typically at 250 ºC).
The good machineability is imputed by a finely dispersed lead content in its microstructure. The presence of lead reduces the grain size and serves as a chip breaker.
Chemical composition % of grade CuZn38Pb2, HPb60-2, HPb60-3, ЛC60-2, C36000, CZ120, C3713, C3604 Tube
| Zn | Al | Fe | Cu | Ni | Sn | Others | Pb |
| Balance | ≤ 0.05 | ≤ 0.20 | 60 - 61 | ≤ 0.30 | ≤ 0.20 | ≤ 0.20 | 1.60 - 2.50 |
