EN 12166: Grade CuZr M – Premium Low‑Alloy Copper with Superior Strength and Conductivity

CuZr, mat. No CW120C, is counted among hardenable, low alloyed copper alloys. To the comparable make CuZr, mat. No 2.1580, acc. to DIN 17666 : 1983-12 applies: The strength properties of CuZr are not as favorable as for CuCrZr but it very well meets high requirements to tempering strength and creep strength at preferably high electric conductivity.Temperature for removal of workhardening approximates 525°C. Processing properties: hot and cold forming: good machinability: moderately soft soldering: moderately hard soldering: moderately gas shielded welding: moderately burnishing: good Application: For commutator lamellae of high strains, rotor windings in high loaded electric motors, diode bases, resistance welding electrodes as well as for electronic calculators.

Properties

General

Property	Temperature	Value
Density	20.0 °C	8.9 g/cm³

Mechanical

Property	Temperature	Value	Comment
Elastic modulus	20.0 °C	135 GPa
Hardness, Brinell	20.0 °C	50 - 120 [-]
Hardness, Vickers	20.0 °C	50 [-]
Poisson's ratio	23.0 °C	0.34 [-]	Typical for Wrought Copper Pure / Low Alloyed Copper
Shear modulus	23.0 °C	48 GPa	Typical for Wrought Copper Pure / Low Alloyed Copper
Tensile strength	20.0 °C	200 MPa
Yield strength Rp0.2	20.0 °C	80 MPa

Thermal

Property	Temperature	Value	Comment
Coefficient of thermal expansion	300.0 °C	1.7E-5 - 1.8E-5 1/K
Melting point		965 - 1100 °C	Typical for Wrought Copper Pure / Low Alloyed Copper
Specific heat capacity	23.0 °C	377 - 420 J/(kg·K)	Typical for Wrought Copper Pure / Low Alloyed Copper
Thermal conductivity	20.0 °C	167 - 330 W/(m·K)

Electrical

Property	Temperature	Value
Electrical conductivity	20.0 °C	2.60E+7 - 5.40E+7 S/m

Chemical properties

Property	Value
Zirconium	0.1 - 0.2 %

DIN 2393-2 Grade USt 37-2: Brightly Drawn Hard Steel – Technical Specifications EN 10203 TH415 Cold Rolled Steel Band – High-Quality, Corrosion-Resistant

Metal