CUZN37 : brass for stamping and lamination

CUZN37 brass has a homogeneous single-phase structure, although it may still contain traces of phase under certain cooling conditions. As the phase is particularly malleable when cold, this makes strong deformation possible by stamping or rolling, for example. CUZN37 is also a brass often used for stamping. Of all brass types, CU ZN 37 is one of the best for polishing. 
The stirring of CUZN37 brass is rather simple, which is not the case for its welding, like most brass (insufficient steam pressure).

Brass standards Cu Zn 37

At the international level, the standards are different and CU ZN37 is designated in several ways: 
  • France (AFNOR): Cu Zn 37 (or CUZN37)
  • Germany (DIN): Cu Zn 37 (or CUZN37)
  • Europe (EN): CW508L
  • ASTM : C27200

CuZn37 - Laiton

CUZN37 and its applications

With excellent mechanical properties, very good flexural strength and low conductivity, the main fields of application for CUZN37 brass are : 
  • Watchmaking: dials, hands, ...
  • Household appliances: resistance wires, ...
  • Automotive: fuel injectors, ...
  • The manufacture of musical instrument strings (guitar, ...)
  • Heating applications

Read the technical data sheet of brass CuZn37

Hot deformability Good
Cold deformability Excellent
Cold reduction before annealing 90% max
Machinability (Basic reference: brass from
bar turning CuZn39Pb2 =100)
Soft soldering Excellent
Hard soldering Excellent
Arc welding in a gaseous atmosphere Good
Arc welding with coated wire electrode Not recommended
Electric resistance welding :
Per point Not recommended
Placed end to end Good
Corrosion resistance :
Nitric acid Bad
Sulphuric and acetic acids Good
Sea water Good
60% hydrochloric and sulphuric acids Medium
Marine Atmosphere Good


Chemical composition in % Physical characteristics (at 20°C)
Zn Remains Density (kg/dm3) 8.44
Cu 63 Electrical conductivity (%IACS) 26
Pb 0.05 max Electrical resistivity (MS/m) 6.6
Sn 0.2 max Thermal conductivity (W/m.K) 120
Al 0.02 max Modulus of elasticity (Kn/mm²) 110
Fe 0.05 max Coef. of thermal expansion (10-6/K) 20.2
Ni 0.3 max Melting temperature (°C) 910 - 950
Total other impurities 0.1 max Shear modulus (kN/mm²) 40


Other copper alloys : CuETP - CuDHP - CuDLP - CuPHC CUZN10 - CUZN15 - CUZN30 - CUZN33 - CUZN36 - Maillechort