Copper and Copper Alloys - Brass - CW712R ~ Naval Brass Rod

CW712R ~ Naval Brass Rod

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

Spec: EN 12163:2011

CW712R Brass Rod

Chemical Element % Present
Copper (Cu) 61.00 - 63.00
Tin (Sn) 1.00 - 1.50
Lead (Pb) 0.20 - 0.60
Iron (Fe) 0.0 - 0.10
Nickel (Ni) 0.0 - 0.20
Others (Total) 0.0 - 0.20
Zinc (Zn) Balance


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

Spec: EN 12163:2011

Bar - From 5mm to 60mm Dia.

Mechanical PropertyValue
Proof Stress 160-200 MPa
Tensile Strength 340-400 MPa
Hardness Brinell 80 - 135 HB
Elongation A 25 - 20 %

Alloy Designations

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


Supplied Forms

CZ112/CW712R is typically supplied as Bar

  • Bar

Corrosion Resistance

The corrosion resistance of CZ112/CW712R is very good


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

Datasheet Search

Last Datasheet Revision

18 July 2019


This Data is indicative only and as such is not to be relied upon in place of the full specification. In particular, mechanical property requirements vary widely with temper, product and product dimensions. All information is based on our present knowledge and is given in good faith. No liability will be accepted by the Company in respect of any action taken by any third party in reliance thereon.

Please note that the 'Datasheet Update' date shown above is no guarantee of accuracy or whether the datasheet is up to date.

The information provided in this datasheet has been drawn from various recognised sources, including EN Standards, recognised industry references (printed & online) and manufacturers’ data. No guarantee is given that the information is from the latest issue of those sources or about the accuracy of those sources.

Material supplied by the Company may vary significantly from this data, but will conform to all relevant and applicable standards.

As the products detailed may be used for a wide variety of purposes and as the Company has no control over their use; the Company specifically excludes all conditions or warranties expressed or implied by statute or otherwise as to dimensions, properties and/or fitness for any particular purpose, whether expressed or implied.

Advice given by the Company to any third party is given for that party’s assistance only and without liability on the part of the Company. All transactions are subject to the Company’s current Conditions of Sale. The extent of the Company’s liabilities to any customer is clearly set out in those Conditions; a copy of which is available on request.