Technical Information - cold rolled, spring-hard Brass Foils & Brass Tapes CW508L

Basic information and applications CW508L

With a composition of 63% copper and 37% zinc, this material is the standard quality for spring-hard rolled brass for leaf springs, connectors and stamped and bent parts.

This material cannot be magnetized.

Further application examples: Components of electrical engineering and precision engineering (watch industry).

Delivery condition

Structure: cold rolled, not hardenable

Surface: no information available

Tensile strength: 370-650 N / mm² (depending on thickness)

Tolerances

Thickness tolerance*: T3

Width tolerance*: according to DIN EN 1791

Straightness: normal

Flatness*: DIN EN 1791

* Specifications apply to cold-rolled, spring-hard brass foils & tapes (CW508L)

Mechanical details

Yield strength Rp0.2: >500 N/mm² at R550

Elongation A 80: no fixation at R550

With good edge processing after cutting (e.g. by surface grinding) the following values ​​can be achieved:

Flexural fatigue strength (medium stress = 0):

The bending fatigue strength of 2.0321 is about 1/3 of the tensile strength Rm (for a bend perpendicular to the rolling direction).

Tension threshold stress (minimum stress = 0):

no information available. However, the maximum values ​​are below the value of the fatigue strength (see also material 1.4310).

Because the fatigue strength depends on various factors such as the ambient conditions and the edge properties, no values ​​can be guaranteed.

In the case of heavy loads or bends that are not perpendicular to the rolling direction, hardened steels such as 1.1274 or 1.4031Mo (rust-resistant) must be used.

Alloy Designations

Material - Composition*

* for the exact composition can be documented in the form of a test certificate 2.2 or 3.1 (according to DIN 10 204) for each batch.

Physical Information

Processing Information CW508L

Punching: This material is very easy to punch. For stamped parts, post-treatment by slide grinding is necessary to achieve good fatigue strength.

Laser cutting: Can only be cut with solid-state lasers.

Etching: brass CW508L is easily etchable.

Bending: Since the high strength of the material is achieved through cold forming during rolling, the rolling direction has a major influence on bending.

 Bending transversely (perpendicular) to the rolling direction:

 t = thickness

Bending lengthways (parallel) to the rolling direction:

 t = thickness

The recommended minimum bending radius also depends on the tensile strength.

Surface grinding: This material cannot be magnetized and cannot be clamped on magnetic chucks of grinding machines.

Welding & Soldering: Due to the low evaporation temperature of the zinc (906 ° C) the brass is less suitable for welding.

Brazing and soft soldering is very possible with this material.

Corrosion resistance CW508L

Brass is well resistant to most organic liquids, water and water vapor as well as various salt solutions. However, if the chloride content is high, there may be corrosion due to "dezincification".

Important NOTE

The technical information listed above or the information provided on the nature or use of the materials serve for description and are not a guarantee of properties. The information with which we want to advise you corresponds to our experience and that of our upstream suppliers. We cannot guarantee the results of processing and application. (03/2024)