EN 12167 Grade R420 CuZn40Mn2Fe1 – High-Strength, Corrosion-Resistant Copper Alloy

CuZn40Mn2Fe1(former identification: CuZn40Mn2) is an unhardenable copper alloy. High hardness and strength parameter are achievable by cold forming only. Tensile strength and Brinell hardness are higher than at CuZn31Si1 (CW708R). Manganese increases corrosion resistance and sliding qualities. CuZn40Mn2Fe1is weathering and seawater resistant. Processing properties: warm forming: good cold forming: moderately machinability: moderately hard soldering: good soft soldering: very good TIG-welding: moderately burnishing: very good Application in apparatus and general machine engineering, for fittings and refrigerators and for shock-absorber rods. In construction trade for weathering facades, for ornamental iron parts such as iron bars, gates or crosses.

Properties

General

Property	Temperature	Value
Density	20.0 °C	8.35 g/cm³

Mechanical

Property	Temperature	Value
Elastic modulus	20.0 °C	100 GPa
Shear modulus	20.0 °C	38 GPa
Tensile strength	20.0 °C	420 MPa
Yield strength Rp0.2	20.0 °C	190 MPa

Thermal

Property	Temperature	Value	Comment
Coefficient of thermal expansion	200.0 °C	1.85E-5 1/K
Melting point		875 - 1075 °C	Typical for Wrought Copper Brass
Specific heat capacity	20.0 °C	377 J/(kg·K)
Thermal conductivity	20.0 °C	67 W/(m·K)

Electrical

Property	Temperature	Value
Electrical conductivity	20.0 °C	8.60E+6 S/m
Electrical resistivity	20.0 °C	1.16E-7 Ω·m

Chemical properties

Property	Value
Aluminium	0.1 %
Copper	57 - 59 %
Iron	1.5 %
Lead	0.8 %
Manganese	1 - 2.5 %
Nickel	1 %
Silicon	0.1 %
Tin	0.5 %

EN 12167 Grade CuZn40Mn2Fe1 H125 – Premium Manganese‑Copper Alloy EN 12167 CuZn40Mn2Fe1 – Weather‑Resistant, High‑Strength Copper Alloy for Cold Forming

Metal