Silicon bronze

Here are some common silicon bronze designations and their corresponding standards:
UNS C65100
Composition: Primarily contains copper, silicon (1.2%-3.0%), and manganese (0.5%-1.5%).
Characteristics: Good mechanical properties and corrosion resistance, suitable for various industrial applications.
UNS C65500
Composition: Primarily contains copper, silicon (1.2%-3.0%), and manganese (0.5%-1.5%).
Characteristics: Excellent corrosion resistance and high strength, widely used in marine and ocean engineering.
UNS C65620
Composition: Primarily contains copper, silicon (2.8%-4.0%), and zinc (0.5%-1.5%).
Characteristics: Good processability and corrosion resistance, commonly used for electrical components and marine equipment.
UNS C69300
Composition: Primarily contains copper, silicon (2.7%-3.5%), and manganese (0.5%-1.5%).
Characteristics: Superior mechanical properties and resistance to dezincification corrosion, suitable for various structural applications.

Common sources of silicon bronze scrap primarily include:
Marine and ocean engineering: Used for hull components, propellers, ocean equipment, and fasteners due to its excellent resistance to seawater corrosion.
Aerospace industry: Used for high-strength, wear-resistant, and corrosion-resistant parts.
Electrical engineering: Used for electrical contacts, switch parts, and connectors due to its good electrical conductivity and wear resistance.
Construction and structural engineering: Used for decorative pieces, fasteners, and structural components due to its good mechanical properties and corrosion resistance.
Chemical equipment: Used for pumps, valves, and piping due to its corrosion resistance suitable for chemical environments.

The value of bronze scrap typically depends on several factors, including the type of alloy, purity, the current market demand, and the ease of recycling and reprocessing. Certain types of bronze are more valuable due to their specific chemical composition and applications. The following are factors that may increase the value of bronze scrap:
1. Alloy type: Since tin has a higher metal price, bronze alloys with a higher proportion of tin are generally more valuable.
2. Purity and cleanliness: Bronze scrap with fewer impurities and non-metallic substances is easier to recycle and reprocess, thus more valuable. Selling the same type of metal content in bulk is far better in price than mixed bronze or bronze alloyed with other copper alloys because it can be directly reused.
3. Ease of recycling: Bronze scrap that is not combined with other metal/non-metal impurities or assembled is typically more valuable because the processing costs are lower. Conversely, if scrap requires a complex pretreatment process, its recycling value may decrease.
4. Shape and size: Large and regular-shaped bronze scrap has more stable metal content, is easier to process, and has a higher metal recovery rate, thus has a higher value compared to small or mixed scraps.
In summary, high-value bronze scrap is typically alloys that contain precious metals, are pure, easy to recycle, and have high market demand. Due to market price fluctuations, it is best to consult local scrap dealers or check current metal market quotes for specific scrap prices.

The value of bronze lies in its purity and proportion. Therefore, processing aims to reduce metallic and non-metallic impurities and sort out bronze from other copper alloys to enhance its production value.
1. Disassembly
Bronze parts often contain other metals or non-metallic impurities such as plastic, brass, and stainless steel, which should be disassembled and removed as thoroughly as possible.
2. Sorting
Bronze should be carefully sorted from brass and red copper. Sorting is primarily done by skilled workers manually. Additionally, different series of bronze are often distinguished in pretreatment at factories that produce specific types of products.

The primary detection method for silicon bronze scrap is visual inspection. Experienced professionals can estimate the copper content of silicon bronze scrap to within ±1% by sight. In addition to visual inspection, silicon bronze scrap can also be tested by crucible analysis. Additionally, for certain metal parts with uncertain copper content, portable spectroscopic analysis can be used for testing.

Bronze is a category of scrap metal with very specific demand attributes. For factories and companies specializing in bronze products such as propellers and ships, directly usable bronze is a highly cost-effective recycled raw material, and therefore their prices have certain advantages compared to traders or other copper alloy production enterprises. Therefore, bronze scrap should be matched to enterprises that can directly use it for recycling.
Competitive Market: The Chinese mainland market has the strongest global competitiveness in terms of price and demand for aluminum bronze scrap. In addition to China, Taiwan and Japan also have a certain degree of competitiveness.

In the trading of silicon bronze scrap, special attention should be paid to the consistency of quoted photos and actual goods, as well as the consistency of the quoted location and the actual shipping location. Since the differences in brass scrap are extremely large, prices are heavily dependent on images and origin information.