Data Sheets

Copper and Copper Alloys   |   Brass

CW712R ~ Naval Brass Rod

CommercialCZ112

Brasses are alloys of Copper and Zinc. They may also contain small amounts of other alloying elements to impart advantageous properties. Brasses have high corrosion resistance and high tensile strength. They are also suited to fabrication by hot forging. Free machining grades of brass set the standard for machining, by which other metals are compared.
Brasses are divided into two classes. The alpha alloys, with less than 37% Zinc, and the alpha/beta alloys with 37-45% Zinc. Alpha alloys are ductile and can be cold worked. Alpha/beta or duplex alloys have limited cold ductility and are harder and stronger. CZ121 / CW614N is an alpha/beta alloy.
Brass alloy CZ121 / CW614N is used for machining. It has Lead added to the composition to improve machinability. The Lead remains insoluble in the microstructure of the brass and the soft particles act as chip breakers.

Applications - CZ112/CW712R, often referred to as Naval Brass is typically used in a range of marine and mechanical applications, including:
~ Heat Exchnager Tubeplates
~ Bolts, Nuts and Rivets
~ Other hardware for underwater applications
~ Machined Components


Chemical Composition

EN 12163:2011
CW712R Brass Rod
Chemical Element % Present
Zinc (Zn) balance
Iron (Fe) 0.1 max
Nickel (Ni) 0.2 max
Others (Total) 0.2 max
Lead (Pb) 0.2 - 0.6
Tin (Sn) 1 - 1.5
Copper (Cu) 61 - 63

Alloy Designations

CZ112/CW712R corresponds to the following designation but may not be a direct equivalent:

CuZn36Sn1Pb


Supplied Forms

CZ112/CW712R is typically supplied as Bar

  • Bar

Generic Physical Properties

Physical Property Value
Density 8.40 g/cm³
Melting Point 900 °C
Electrical Resistivity 26 % IACS
Electrical Resistivity 0.066 x10^-6 Ω .m

Mechanical Properties

EN 12163:2011
Bar - From 5mm to 60mm Dia.
Mechanical Property Value
Proof Stress 160-200 MPa
Tensile Strength 340-400 MPa
Hardness Brinell 80 - 135 HB
Elongation A 25 - 20 %

Mechanical properties vary widely according to condition (soft/half hard/etc)


Corrosion Resistance

The corrosion resistance of CZ112/CW712R is very good

Machinability

The machinability of alloy CZ112/CW712R is 60 to 70% compared to CZ121/CW614N Brass which is rated as 100.