Brass CuZn15

Brass Cu Zn 15 also called Similor

CUZN15 brass is an alloy of copper and zinc, also known as C23000. As its name indicates, it is composed of 85% copper and 15% zinc. This alloy has a golden colour due to its composition and is also called Similor. CuZn15 is resistant and very ductile when cold, therefore suitable for all deformation work (bending, stamping and other cold forming). It is one of the most corrosion-resistant brass types. It is also very easily polished, nickel-plated or chrome-plated.

Cu Zn 15 : international standards

The standards of this alloy are different at the international level, it is designated in several ways:

Applications and properties of C23000

C23000 brass has excellent cold and hot forming properties and is ideal for striking, beating or stamping. Thanks to its 15% zinc content, C23000 has very good resistance to corrosion cracking. It also has excellent mechanical strength (higher than pure copper) and low conductivity. It has good welding and brazing properties.
It is mainly used in the field of jewellery and watches, but also in the electronics and plumbing industries. Thanks to its properties, it is also renowned as an outdoor metal and has an important place in modern architecture.


Hot deformability Medium
Cold deformability Excellent
Cold reduction before annealing 85% 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 Medium
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 Reste Density (kg/dm3) 8.75
Cu 84.0 - 86.0 Electrical conductivity (%IACS) 37
Pb 0.05 max Electrical resistivity (MS/m) 4.7
Sn 0.2 max Thermal conductivity (W/m.K) 159
Al 0.02 max Modulus of elasticity (Kn/mm²) 124
Fe 0.05 max Coef. of thermal expansion (10-6/K) 18
Ni 0.3 max Melting temperature (°C) 1000 - 1025
Total des autres impuretés 0.1 max Shear modulus (kN/mm²) 45.5


Brass supplier CuZn15 C23000

Metal Rolling Services, a supplier of non-ferrous metals with no minimum order limit, offers you brass C23000/CuZn15. To be ordered only according to your needs, so you avoid ending up with a dead stock of brass. You can also take advantage of our tailor-made service by ordering your C23000 in the thickness, width, length and hardness you require.

Contact us and get a quotation for brass CuZn15 quickly.

Other metals to order

We offer you other brasses of different compositions, always available to order with no minimum quantity.

CUZN30 - CUZN33 - CUZN36 - CUZN37 - CUZN10