Bronze Alloys - Bronze CA104 Properties, Fabrication and Applications, Supplier Data by Aalco

Topics Covered

Background

Aluminium Bronzes

Alloy CA104

Chemical Composition of Bronze Alloy CA104

Properties of Bronze Alloy CA104

Mechanical Properties of Bronze Alloy CA104

Physical Properties of Bronze Alloy CA104

Alloy Designations

Corrosion Resistance of Bronze Alloy CA104

Fabrication of Bronze Alloy CA104

Cold Working of Bronze Alloy CA104

Hot Working of Bronze Alloy CA104

Heat Treatment of Bronze Alloy CA104

Machinability

Welding and Joining of Bronze Alloy CA104

Applications of Bronze Alloy CA104

Supplied Form

Background

Bronzes are copper-based alloys. Major alloying elements are often, but not always, zinc and tin. They offer a combination of properties such as high strength, hardness, corrosion resistance and wear resistance.

Aluminium Bronzes

Copper - Aluminium alloys are commonly known as Aluminium Bronzes. These alloys cover a range of copper-based alloys in which the primary alloying element is up to 14% aluminium. The four major groups of Aluminium Bronzes are:

· Single phase alloys containing less than 8% Aluminium.

· Two-phase or duplex alloys containing 8 to 11% Aluminium. These alloys also frequently have additions of Iron and Nickel to increase strength. This group contains casting alloys AB1 and AB2, the wrought alloys CA105, CA104 and Naval Engineering Standard (NES) alloys (NES 747 when cast and the wrought form NES 833).

· The low magnetic permeability Aluminium Silicon alloys.

· The Copper Manganese Aluminium alloys with good castability.

Alloy CA104

Bronze Alloy CA104 is an Aluminium Bronzes with high strength. Bronze Alloy CA104 also has excellent corrosion resistance, abrasion resistance and ability to withstand shock loading.

Chemical Composition of Bronze Alloy CA104

Table 1. Typical chemical composition for bronze alloy CA104

%	CA104
Iron (Fe)	4.20 max
Aluminum (Al)	9.30 max
Manganese (Mn)	0.30 max
Nickel (Ni)	4.20 max
Copper (Cu)	Balance

Properties of Bronze Alloy CA104

Mechanical Properties of Bronze Alloy CA104

Table 2. Typical mechanical properties for bronze alloy CA104

Grade	CA104
Tensile Strength (MPa)	600-760
Proof Stress 0.2% (MPa)	400-530
Elongation A5 (%)	15-5
Hardness VPN	170-220

Physical Properties of Bronze Alloy CA104

Table 3. Typical physical properties for bronze alloy CA104

Property	Value
Density	7.58 kg/m³
Melting Point	1035°C
Modulus of Elasticity	115 GPa
Thermal Conductivity	37.7 W/m.K

Alloy Designations

Bronze Alloy CA104 corresponds to the following designations:

CEN	BS	UNS
CW307G	CA104	C63200

Corrosion Resistance of Bronze Alloy CA104

Corrosion resistance is considered to be excellent in most environments.

Fabricat ion of Bronze Alloy CA104

Cold Working of Bronze Alloy CA104

Bronze Alloy CA104 has only a fair rating for cold working.

Hot Working of Bronze Alloy CA104

The hot forgeability rating for Bronze Alloy CA104 is quite good at 70, compared to Forging Brass which is rated as 100.

The recommended hot working temperature for this alloy is between 815 and 900°C. The hot working capabilities of Bronze Alloy CA104 are considered to be good.

Heat Treatment of Bronze Alloy CA104

Solution treatment or annealing can be done by rapid cooling after heating to 620-800°C.

Machinability

Bronze Alloy CA104 has a fairly poor machinability rating of 30 compared to Alloy 360 FC Brass which is rated as 100.

Welding and Joining of Bronze Alloy CA104

· Gas shielded arc welding of CA104 is rated as “excellent”

· Coated metal arc welding, spot welding and butt welding are rated as “good”

· Soldering, brazing and seam welding are rated as “fair”

· Oxyacetylene welding is rated as “fair”

Applications of Bronze Alloy CA104

Bronze Alloy CA104 is typically used in:

· Valve and pump components

· Marine equipment

· Fasteners

· Engine components

· High temperature applications

Supplied Form

Bronze Alloy CA104 is typically supplied by Aalco in the following form:

· Round rod

Source: Aalco

For more information on this source please visit Aalco

Date Added: May 11, 2005 | Updated: Aug 9, 2011

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