Background

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.
Brass Classes

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. CZ114 is a duplex or alpha/beta alloy.
Alloy CZ114

Brass alloy CZ114 is a versatile high strength, hot workable, machinable engineering alloy.
Chemical Composition

Table 1. Typical chemical composition for brass alloy CZ114

%


CZ114

Cu


57

Pb


-

Sn


0.75

Fe


0.75

Al


-

Mn


1.5

Zn


Balance

Si


-

Ni


-

Properties
Mechanical Properties

Table 2. Typical mechanical properties for brass alloy CZ114

Grade


CZ114

Tensile Strength (MPa)


500

Proof Stress 0.2% (MPa)


250

Elongation A5 (%)


15

Hardness VPN


140-175
Physical Properties

Table 3. Typical physical properties for brass alloy CZ114

Property


Value

Density


8.36 g/cm3

Melting Point


865°C

Modulus of Elasticity


96.5 GPa

Electrical Resistivity


0.090x10-6 Ω.m

Thermal Conductivity


88.3 W/m.K at 20°C
Alloy Designations

Brass alloy CZ114 corresponds to the following designations:

CEN


BS


UNS

CW721R


CZ114


C67500

CZ114 is also sometimes called Manganese Bronze.
Corrosion Resistance

The addition of Tin to the composition of CZ114 increases this alloys’ resistance to corrosion in marine and mildly acidic environments.
Fabrication
Cold Working

CZ114 has a poor rating for cold working.
Hot Working

Hot working of CZ114 is excellent.

The hot forgeability rating of CZ114 is very good at 80 compared to forging brass which rated as 100. The recommended hot working temperature for this CZ114 is between 625 and 750°C.
Heat Treatment

The annealing temperature of CZ114 is between 425°C and 600°C.
Machinability

CZ114 has a poor machinability rating of 30 compared to Alloy 360 FC Brass which is rated as 100.
Welding and Joining

· Soldering and brazing of CZ114 are rated as “excellent”.

· Oxyacetylene welding, butt welding and spot welding are rated as “good”.

· Gas shielded arc welding and seam welding are rated as “fair”.

· Coated metal arc welding is not recommended.
Applications

CZ114 is typically used in:

· Architectural applications

· High strength components

· Valves

· Valve stems

· Fittings

· Marine fittings
Supplied Forms

CZ114 is typically supplied by Aalco in the following forms:

· Round Rod