1. Application examples
The alloy 2.0070 (SE-Kupfer) is superior to the commonly used copper grades E-Cu (UNS C11000) and SF-Cu (UNS C12200) with a minimum copper content of 99.95% and low oxygen and phosphorus content.

This material is used in general electrical engineering such as cable ties and connectors, transformer coils, semiconductor carriers and stamped and bent parts (e.g. for seals).

Further application examples:
Heat dissipation plates and heat exchangers as well as vacuum technology.

The material is not approved as a spring material. Brass or bronze should be used for springs, and copper-beryllium for very high spring forces.
If there are high demands on purity, the material 2.00 = OFE copper with a copper content of at least 99.99% should be used.

2. Material codes
German Norm: 2.0070 SE-Kupfer58
UNS: C10300
English Norm: CW020A
English Norm: CU-PHC
French Norm:
Japanese Norm: -

3. Alloy Composition *
Pb: ca. 4ppm
Bi: < 1ppm
As: ca. 3ppm
Sb: ca. 3ppm
Sn: < 1ppm
Zn: <3ppm
Fe: ca. 8ppm
Ni: ca. 8ppm
Ag: ca. 10ppm
Se: ca. 1ppm
Te: <1ppm
S: ca. 8ppm
P: ca. 30ppm

4. Delivery condition
Condition: cold rolled, not hardenable
Surface: no data available
Ultimate tensile strength: >360 N/mm² (at thickness 0,50mm only >300N/mm²)
Further mechanical data: see chapter 7 and 8.

5. Sizes
thicknesses: 0,01 to 0,50 mm
Raw material width: 305mm
standard widths: 150 und 305 mm
edges: cut Lengths: individual lengths from 5 to 10 000 mm or as Coil

6. Tolerances
thickness tolerace: +/- 10%
width tolerance: -0/+0,40mm
straightness: normal
flatness: wave height max. 1,0 mm

7. Further mechanical data
Yield strength Rp0,2 : > 320 N/mm²
Dehnung A 50: no information possible
Hardness: > 110 HV

If good tumbling is done, the following values can be achieved:
Reversed bending stress (Mean stress = 0):
The maximum value is approx. 30% of the tensile strength for temper rolled copper if bending direction is at a 90° angle to the rolling direction

Fluctuating bending stress (Minimum stress = 0):
no data available, but the maximum value is lower than for the reversed bending stress.As the fatigue strength depends on different factors like the corrosive conditions and the edge treatment, no definitive endurance limit values can be guaranteed.
We suggest the use of brass for springs instead of copper.
At high forces or bending not in the right angle to the rolling direction the alloy CuBe2 is recommended (or hardened steels like 1.1274 or 1.4031Mo).

The highest application temperature is around 120° Celsius, depending on the load.
Please note that Young's modulus values drop as temperature increases.

8. Physical properties
Density: 8,94 g/cm³
Thermal conductivity: 390 W/(m °C) depending on the temperature
Heat capacity: 0,385 J/(kg °C) medium value at 50 – 100 °C
Thermal expansion: 17,7 x 10 -6 (between 0 - 300 °C)
Electric resistance: 58 mS/m (equivalent to 99% IACS) in the temper rolled condition

Modus of elasticity: 127 000 MPa at 20 °C
Relative permeability μr: 1,000 non magnetizable (please see chapter 13 for more details)

9. Blanking
We recommend a punch-to-die clearance of 4-10 % of the strip thickness.
The corner radius should be at least 0.25 mm and the punching die should be at least twice the strip thickness.

10. Laser cutting
This alloy can be laser cut by solid state lasers.
Due to the high thermal conductivity of copper the laser cutting is difficult.

11. Photo etching
This alloy is very easy to etch.

12. Bending
Copper can be bended in the soft condition without any limitations. However, in the temper rolled condition supplied by h+s a minimum bending radius of 1 x strip thickness should be used.

13. Flat grinding
Copper is not magnetic and can not be hold by magnetic clamping devices of flat grinding machines.

14. Welding and soldering
Copper is suitable for gas shielded welding and medium suitable for laser welding.
Electric resistance welding should be avoided.

Hard and soft soldering of copper can be done easily.

15. Corrosion resistance
Copper has a good resistance against normal industrial atmosphere (creation of dull or green protective layer), water (maximum flow velocity 1.5-2 m/s), pure water steam, non oxidising acids, alkali (except ammoniac alkali and cyanide containing chemical compounds) and neutral saline solutions.
Not resistant against: oxidising acids, humid ammoniac and halogenated gases, hydrogen sulphide and seawater (especially at high flow velocity).

Important Annotation
The specifications which are given in this technical information sheet about the condition and application of the alloys are only for reference and are no confirmation about certain performances and characteristics.
The information correspond to our own experiences and experiences of our suppliers.
We can not guarantee for the results during processing and utilisation.