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thyssenkrupp Materials North America

Brass alloy C655, also known as silicon bronze, is a copper-silicon alloy containing approximately 96% copper, 3% silicon, and small amounts of other elements. This specific composition imparts excellent corrosion resistance, especially in aggressive environments such as seawater and marine atmospheres, making it a popular choice for marine hardware, fasteners, and architectural applications. The addition of silicon enhances its strength and makes it suitable for high-stress and structural components. Brass C655 exhibits good electrical and thermal conductivity, making it valuable in electrical connectors and heat exchangers. Its malleability allows for easy forming and shaping, making it suitable for various manufacturing processes and artistic works. With its corrosion resistance, strength, electrical conductivity, and formability, brass alloy C655 is a versatile material used in industries seeking reliable and durable solutions for a wide range of components and decorative items.

Product Properties

Chemical

Trade Name
High Silicon Bronze, A
Cu
Rem.
Fe
0.8
Mn
.50-1.3
Ni
0.6
Pb
0.05
Si
2.8-3.8
Zn
1.5

Mechanical

Form
Flat Product
Flat Product
Flat Product
Flat Product
Flat Product
Rod
Flat Product
Rod
Rod
Flat Product
Rod
Flat Product

Physical

Melting Point, Liquidus (°F)
1880

Fabrication

Machinability Rating (Free Cutting Brass = 100)
30

E = Excellent
G = Good
F = Fair
NR = Not Recommended

Machinability ratings must be recognized as approximate values. They are a reasonable guide to relative tool life and power required for cutting. Variables of speed, cutting oil, feed, and depth of cut will significantly affect these ratios.

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