Tombak is a brass alloy with a high copper content: at least 72% copper with a maximum of 28% zinc.

As the percentage of zinc increases, the alloy becomes harder. The alloy`s color also becomes lighter, moving from red to golden yellow to light yellow.

Application areas for tombak mainly include the arts, decorative items and metal leaf. The five and ten cent coins made when the German mark was still used consisted of tombak-plated steel.

Standard tombak types in our production program include:


  • EN: CuZn10; UNS: C22000; BS: CW 501L (CZ 101); ISO: CuZn10
  • 90% copper, 10% zinc
  • Very good mechanical properties
  • Tombak that appears similar to gold (color 1)
  • Electrical conductivity: 24.7 m/Ω mm²
  • Suitable for stamping, die-cutting,, hammering, embossing


  • EN: CuZn15; UNS: C23000; BS: CW 502L (CZ 102); ISO: CuZn15
  • 85% copper, 15% zinc
  • Tombak that appears similar to gold (color 2.5)
  • Very workable when cold
  • Suitable for stamping,  die-cutting, hammering, embossing
  • Electrical conductivity: 21.1 m/Ω mm²

Coil Calculator for Metal Foils

Outer diameter, weight, foil length and much more: With our practical calculators, you can calculate the essential key figures of a ring yourself and thus obtain detailed information on the metal foil required in your project.

To the Coil Calculator

Please touch base

If you have further requirements, we would feel very happy to offer our assistance.


Solar industry

For over 25 years SCHLENK has provided high precision connectors for the photovoltaic industry and is known internationally as a market and technology leader.



Here you can download catalogues and further publications all about SCHLENK Metal Foils.