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Brass Extrusion and Components
Silicon Bronze is a copper-based alloy containing silicon as the primary alloying element, typically ranging from 2.5% to 4.5%. The alloy primarily consists of copper (94-96%) with silicon and small amounts of other elements such as manganese, zinc, iron, tin, or lead, depending on the specific grade. Silicon bronze is valued for its high strength, excellent corrosion resistance, good wear resistance, and attractive reddish-brown colour.
Silicon Bronze is a copper-based alloy containing silicon as the primary alloying element, typically ranging from 2.5% to 4.5%. The alloy primarily consists of copper (94-96%) with silicon and small amounts of other elements such as manganese, zinc, iron, tin, or lead, depending on the specific grade. Silicon bronze is valued for its high strength, excellent corrosion resistance, good wear resistance, and attractive reddish-brown colour.
Silicon acts as a deoxidiser, reducing brittleness and increasing strength while providing self-lubricating properties. This makes silicon bronze ideal for connections, fixtures, and bearing applications. The alloy offers better strength and corrosion resistance compared to brass, with non-magnetic properties and excellent machinability.
Silicon acts as a deoxidiser, reducing brittleness and increasing strength while providing self-lubricating properties. This makes silicon bronze ideal for connections, fixtures, and bearing applications. The alloy offers better strength and corrosion resistance compared to brass, with non-magnetic properties and excellent machinability.
Common Silicon Bronze Grades and Their Equivalent Standards
Common Silicon Bronze Grades and Their Equivalent Standards
- Composition: Cu (remainder), Si (0.8-2.0%), Zn (1.5% max), Fe (0.8% max), Mn (0.7% max), Pb (0.05% max)
- Description: Low-silicon bronze with good corrosion resistance and moderate strength. Used in electrical applications, fasteners, and marine hardware.
- Composition: Cu (94.6%), Si (3.0%), Zn (0.5%), Mn (1.0%), with traces of other elements
- Description: High-strength engineering alloy with excellent corrosion resistance to fresh and saltwater, acids, alkalies, and salts.
- Composition: Cu (93.0%), Si (3.5%), Mn (2.0%)
- Description: Enhanced silicon bronze with increased manganese content for improved mechanical properties.
- Composition: Cu (87.0%), Si (2.5%), Sn (10.0%), Pb (0.5%)
- Description: Specialised silicon-iron bronze alloy designed for high-load, wear-resistant applications.
- Composition: Cu (94.0% min), Si (2.8-3.5%), Al (0.25% max), Mn (1.50% max)
- Description: Silicon bronze is used for fasteners with good corrosion resistance and moderate strength.
Silicon Aluminium Bronze Grades
Silicon Aluminium Bronze Grades
- Description: Silicon-aluminium bronze with 3% aluminium and silicon addition.
- Composition: Cu (remainder), Al (6.3-7.6%), Si (1.5-2.2%), Fe (0.3% max)
- Description: Single-phase silicon aluminium bronze with high ductility, good corrosion resistance, and low magnetic permeability.
Key Properties and Applications
Key Properties and Applications
Silicon bronzes offer excellent corrosion resistance in marine environments, high thermal and electrical conductivity, good formability, and resistance to wear and fatigue. They are extensively used in:
Silicon bronzes offer excellent corrosion resistance in marine environments, high thermal and electrical conductivity, good formability, and resistance to wear and fatigue. They are extensively used in:
- Marine hardware and fasteners
- Electrical components and conductors
- Architectural elements and sculptures
- Aerospace applications
- Heavy-duty bearings and bushings
- Welding applications (CuSi3 welding wire for automotive and metal sculpture work)
The ISO symbols follow the copper-silicon alloy designation system, clearly identifying the primary alloying elements and their approximate percentages, such as CuSi1, CuSi3Mn1, CuAl7Si2, and CuSi3Fe2Zn3.
The ISO symbols follow the copper-silicon alloy designation system, clearly identifying the primary alloying elements and their approximate percentages, such as CuSi1, CuSi3Mn1, CuAl7Si2, and CuSi3Fe2Zn3.
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