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Bronze Castings, Extrusions and Forgings

Bronze Castings, Extrusions and Forgings

Bronze is an alloy of copper available in three major classes: statuary, architectural and commercial. In addition to copper, statuary bronze contains 2% tin and 1% zinc, which makes it closest to proper bronze. The other two types of bronze contain no tin and are commonly referred to as brass.

Bronze alloys differ widely with regards to their components and may contain silicon, manganese, aluminum, zinc or other elements. They are easy to weld and machine, providing superior corrosion resistance to copper. The exceptional flexibility of bronze makes it a popular material for the creation of castings, extrusions and forgings.

Bronze has numerous industrial applications including various electric parts, machinery and tools. In architecture, bronze is commonly used to create molding and trim shapes, window and door frames, curtain wall systems, railings and mounting bars. Bronze curtain rods and furniture components appear in many elegant homes. Because of their beauty, bronze and other copper alloys are also often used in the field of art and design.

Bronze Investment Castings

At Bunty LLC, we use the process of bronze casting, also known as low wax investment casting, to produce complex, thin-walled items with rich surface details. Our company customizes the process to manufacture superior bronze products that meet precise customer specifications. Some of our products serve the maritime, oil and gas, and aerospace industries.

We work with four different types of bronze casting grades. Each of these holds advantages for manufacturing certain types of metal parts:

Tin bronze

Thanks to the addition of tin, tin bronze products possess increased hardness and strength. The presence of tin also increases ductility and load-carrying capacity, enabling metal parts to display lower resistance to friction but excellent impact and wear resistance. Many companies use tin bronze components in gears, bearings, fittings and as cylindrical linings, i.e. as bushings. Taking into consideration their good corrosion resistance and relatively low lead content, they can also be used in sea water.

Silicon bronze

First employed in the chemical industry, and more recently in aerospace technology and metal TIG welding processes, silicon bronze alloys contain some 96% copper and an admixture of silicon and other low-lead brass alloys, including iron, tin, manganese or zinc. This low-lead alloy displays a pleasing surface finish when used in bronze castings, as well as high resistance to corrosion.

Aluminum bronze

Bronze castings made from aluminum bronze alloys offer both high strength and exceptional resistance to daily wear and corrosion in atmospheric conditions. These metal components typically contain 10% aluminum, plus smaller percentages of nickel and iron. Widely used in marine environments, and as shaft and pumping parts in machinery involved in pumping seawater or other industrial fluids, durable aluminum bronze items may also form sleeve bearings. Castings made from this alloy display resistance to tarnishing and to corrosion from sea water.

Manganese bronze

Manganese bronze castings perform valuable roles in the oil and gas, aviation, aerospace, marine and industrial manufacturing industries. Most alloys of manganese bronze include varying percentages of aluminum, copper, manganese and iron. Metal parts formed in this way, such as bearings, bushings and gears, typically require proper lubrication, but will display excellent mechanical properties and high corrosion resistance. They may carry high loads and operate at comparatively high speeds.

Bronze Extrusions

Extrusions of various copper alloys, including bronze and brass, play an important role in architecture today. They are commonly used in cornices and custom-designed decorative columns, door hardware, stairways, balcony railings, handrail caps, window mullions and more. Available in interesting shapes and colors, bronze extrusions furnish both aesthetic interest and exceptional strength and stability. 

In addition to architecture, bronze extrusions are commonly used for interior design. Their flexibility allows for the creation of unique and customized pieces of furniture. Unlike many other materials, bronze has a visual appeal that only improves over time and its extrusions are therefore often applied to create decorative items or pieces of art.


Bunty LLC offers an array of high quality bronze and copper-based extrusions. We strive to tailor items to meet the goals of individual customers. Our long-lasting products display exceptional durability and are custom-designed to fulfill individual needs. We are able to produce extrusions at the fastest possible speeds in our facility.

Bronze Forgings

Forging bronze involves hammering, pressing or rolling both hot and cold bronze alloys until they reach a desired shape. The process of forging produces quality items with unparalleled strength. It also provides objects with outstanding joining and plating properties in addition to exceptional polishing and finishing characteristics.

Bronze forgings have numerous benefits such as superior mechanical qualities, dimensional precision, high density, repeatability and excellent surface finishes. When forged, many bronze alloys also possess high electrical and thermal conductivity, high ductility and superior corrosion protection, as well as non-magnetic and non-sparking characteristics. Additional benefits include leak resistance and cost-effectiveness.

Bronze offers flexibility in the type of forging process that is utilized. Different alloy compositions can be forged at cold, warm or hot temperatures using closed or open die forging processes.


Here, at Bunty LLC, we offer bronze forgings that can be applied in a variety of industries including consumer, industrial, medical, agricultural and automotive. We provide different forging processes using various copper-based alloys to meet individual requirements. Highly precise forging procedures combined with our knowledge allow us to create exceptional bronze forgings that fulfill all your needs. Our extensive forging experience and high level of customer service ensure maximum speed of product delivery.


For further information about our bronze castings, extrusions & forgings, contact us via the convenient website form or submit a request for quote directly. We welcome your inquiries.

About us

From a contract manufacturing firm, BuntyLLC evolved into a full service custom machined, forged and cast metal parts fabrication enterprise. We supply global solutions from our headquarters in Greenville, South Carolina.

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