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EN 12166 CuZn30 H170 – Premium Unhardenable Copper Alloy for Superior Strength and Machining

CuZn30 (CW505L) is an unhardenable wrought alloy. High hardness and strength parameter are achievable by cold forming only. Thermal and electrical conductivity are lower than for CuZn28. Corrosion resistance is similar to pure copper. Processing properties: warm forming: good cold forming: very good machinability: moderately hard and soft soldering: very good TIG-welding: good burnishing: very good CuZn30 is used for deep drawing components, musical instruments, hose tubes, springing elements, clockfaces and as cladding material. For the electrolytically tinned strip the coatings (Sn bright, Sn matt, Sn fuzed, SnPb) are listed by the application (better solderability, better corrosion resistance, reduction of the electrical contact resistance, better appearance) in the DIN EN 14436 : 2004-11 (Table 5)

Properties

General

PropertyTemperatureValue

Density

20.0 °C

8.5 - 8.55 g/cm³

Mechanical

PropertyTemperatureValueComment

Elastic modulus

20.0 °C

114 - 115 GPa

100.0 °C

112 GPa

200.0 °C

107 GPa

300.0 °C

103 GPa

400.0 °C

96 GPa

500.0 °C

88 GPa

600.0 °C

77 GPa

700.0 °C

67 GPa

Hardness, Vickers

20.0 °C

170 - 200 [-]

Poisson's ratio

20.0 °C

0.34 [-]

Shear modulus

23.0 °C

40 GPa

Typical for Wrought Copper Brass

Thermal

PropertyTemperatureValueComment

Coefficient of thermal expansion

100.0 °C

1.9E-5 1/K

150.0 °C

1.9E-5 1/K

300.0 °C

2E-5 1/K

Melting point

875 - 1075 °C

Typical for Wrought Copper Brass

Specific heat capacity

20.0 °C

377 J/(kg·K)

100.0 °C

398 J/(kg·K)

200.0 °C

410 J/(kg·K)

300.0 °C

419 J/(kg·K)

400.0 °C

431 J/(kg·K)

500.0 °C

444 J/(kg·K)

600.0 °C

452 J/(kg·K)

700.0 °C

456 J/(kg·K)

Thermal conductivity

-200.0 °C

50 W/(m·K)

20.0 °C

121 - 126 W/(m·K)

200.0 °C

147 W/(m·K)

Electrical

PropertyTemperatureValue

Electrical conductivity

20.0 °C

1.60E+7 - 1.70E+7 S/m

Electrical resistivity

200.0 °C

7.7E-8 Ω·m

500.0 °C

1.08E-7 Ω·m

Specific Electrical conductivity

28 - 29 % IACS

Chemical properties

PropertyValue

Aluminium

0.02 %

Copper

69 - 71 %

Iron

0.05 %

Lead

0.05 %

Nickel

0.3 %

Tin

0.1 %


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