Bronze Alloys - Bronze CA104 Properties, Fabrication and Applications

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)

3.00 - 5.00

Aluminum (Al)

8.50 - 11.00

Manganese (Mn)

0.0 - 1.00

Nickel (Ni)

4.00 - 6.00

Lead (Pb)

0.0 - 0.05

Others (Total)

0.0 - 0.20

Silicon (Si)

0.0 - 0.20

Tin (Sn)

0.0 - 0.10

Zinc (Zn)

0.0 - 0.40

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

680 - 740 Min MPa

Proof Stress

320 - 400 Min MPa

Elongation A

8-10 Min %

Hardness Brinell

170 - 210 HB

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.

Fabrication 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

DISCLAIMER

This Data is indicative only and must not be seen as a substitute for the full specification from which it is drawn. In particular, the mechanical property requirements vary widely with temper, product and product dimensions. The information is based on our present knowledge and is given in good faith. However, no liability will be accepted by the Company is respect of any action taken by any third party in reliance thereon.

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.

Any 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. Any contract between the Company and a customer will be subject to the company’s 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.

This information has been sourced, reviewed and adapted from materials provided by Aalco - Ferrous and Non-Ferrous Metals Stockist.

For more information on this source, please visit Aalco - Ferrous and Non-Ferrous Metals Stockist.

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