CUPHIN® information brochure

all information about the special material


Bruse Pure - Technical Information


More information about Cuphin

Valve technology for healthy living

Valve materials are crucial in drinking water installations. The advanced copper-zinc alloy CUPHIN® used in Bruse valves and fittings not only meet highest technical and mechanical demands but also comply with present and future requirements in regard to hygiene.

Clear regulations

Valve materials and the products manufactured form them are tested in regard to the migration of chemical substances and the growth or microorganisms. Beginning on 01/12/2013 the threshold for lead in the scope of the drinking water directive Chemical requirements (§6 Chemische Anforderungen) will be established at 10 µg/l to reduce health risks. With our high-quality valves from CUPHIN® we offer safety and hygiene in drinking water installations already today.

CUPHIN® - Chemical composition





(Nominal, mass percentage)

76 %

3 %

0,05 %


CUPHIN® - Physical properties


Electrical conductivity

Thermal conductivity


(reference values)

8,3 g/cm3

4,5 MS/m

ca. 35 W/mK

100 GPa

Extraordinary mechanical properties

Rm tensile strength

Rp 0,2 %-proof stress

A5 breaking elongation

HB hardness

700 MPa

480 MPa

20 %

180 Brinell

(reference values apply to semi-finished material of approx. 20 mm diameter)

The material CUPHIN® which we use for our valves is distinguished by good mechanical properties. This is otherwise known only from a few steel grades.

More information at

Corrosion resistance

Stress corrosion cracking resistant (SCCR) and dezincing resistant (DZR) at the same time: Hardly any other material in drinking water installations has such combined properties as CUPHIN®.

The requirements of DIN 50930-6 in regard to the alloy composition will be met without problems even beyond 2013.

Conclusion: Bruse has developed procedures and methods to offer you contemporary valves made from CUPHIN®.

Bruse Pure - General Informations »