Hard brass

Here are common classifications of tin bronze:
1. C51000 (Phosphorus Deoxidized Tin Bronze):
Features: Has excellent elasticity and wear resistance, good formability and weldability, and high fatigue resistance and corrosion resistance.
Element Content: Copper content is approximately 94.8%-96.0%, tin content is about 4.0%-6.0%, and phosphorus content is about 0.03%-0.35%.
Application: Commonly used for the manufacture of springs, bearings, shafts, gears, pump parts, and electrical connectors.
2. C51100 (Phosphorus Deoxidized Tin Bronze, Low Tin):
Features: Contains a lower percentage of tin than C51000, maintaining good mechanical properties, while having better formability.
Element Content: Copper content is about 95.0%-97.0%, tin content is about 3.0%-5.0%, and phosphorus content is about 0.03%-0.35%.
Application: Suitable for the manufacture of electrical connectors and springs that do not require extreme elasticity.
3. C51900 (Phosphorus Deoxidized Tin Bronze, High Tin):
Features: Has a higher tin content, providing higher strength and hardness, while maintaining good elasticity.
Element Content: Copper content is about 91.0%-94.0%, tin content is about 5.5%-7.0%, and phosphorus content is about 0.03%-0.35%.
Application: Commonly used for the manufacture of springs and bearings that require higher strength and wear resistance.
4. C52100 (Phosphorus Deoxidized Tin Bronze, High Tin):
Features: Contains a higher proportion of tin, providing higher strength, hardness, and corrosion resistance, with excellent wear resistance and elasticity.
Element Content: Copper content is about 91.0%-94.0%, tin content is about 7.0%-9.0%, and phosphorus content is about 0.03%-0.35%.
Application: Suitable for the manufacture of high-performance springs, bearings, and electrical connectors.

Aluminum bronze scrap is often found in marine environments, such as ships and seaside factories, due to its strong corrosion resistance, especially in seawater. It also has good wear resistance and oxidation resistance, and is often used in high-load applications such as aircraft components, marine fittings, valves and pump parts, high-strength fasteners, and bearings.

The value of bronze scrap typically depends on several factors, including the type of alloy, purity, existing market demand, and the ease of recycling and reprocessing. Certain types of bronze are more valuable due to their specific chemical composition and applications. Here are some factors that can increase the value of bronze scrap:
1. Alloy Type: Bronze alloys with a higher percentage of tin, a more expensive metal, are usually 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 scrap with consistent metal content as a single grade is much more valuable than mixed bronzes or bronze mixed with other copper alloys.
3. Ease of Recycling: Bronze scrap that is not bound with metal or non-metallic impurities and is easy to recycle and sort is typically more valuable, due to lower processing costs. By contrast, if the scrap requires a complex pretreatment process, its recycling value may be reduced.
4. Shape and Size: Large and regular-shaped bronze scrap has more stable metal content, easier to process, and higher metal recovery rate, thus higher in value compared to small or mixed scrap.
Tin bronze (Cu86%Zn4%Si5%Pb4%) prices are around 88% of LME, and 85-5-5-5 tin bronze prices are around 84%-85% of LME.
In summary, higher value bronze scrap is typically alloys that contain precious metals, are pure, easily recycled, and have high market demand. Due to market price fluctuations, to obtain specific scrap prices, it is best to consult local recyclers or check current metal market prices.

The value of bronze lies in its purity and composition. Therefore, the purpose of processing is to reduce metallic and non-metallic impurities and distinguish bronze from other copper alloys to increase 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 mainly done by skilled workers by hand. In addition, bronze of different series is often distinguished in the pretreatment stage in factories with specific product types.

The primary detection method for tin bronze scrap is visual inspection. Experienced professionals can estimate the copper content of aluminum bronze scrap with ±1% accuracy by sight. In addition to visual inspection, detection methods for aluminum bronze scrap include crucible testing. Additionally, for metal pieces with uncertain copper content, portable spectrometric analysis can be used for detection.

Bronze is a type of non-ferrous scrap with very specific demand attributes. For factories and enterprises specializing in the production of bronze products such as propellers and ships, bronze that can be directly utilized is a cost-effective recycled raw material, thus their prices have certain advantages compared to traders or other copper alloy production enterprises. Therefore, bronze scrap should be matched with companies that can directly use the material in its current grade.
Competitive Market: The Chinese mainland market is highly competitive for aluminum bronze scrap, both in terms of price and demand. In addition to China, Taiwan and Japan also have certain competitiveness.

In transactions of tin bronze scrap, special attention should be paid to the consistency between the reported images and the actual goods, and the consistency between the reported location and the actual shipping location. Because the variability of brass scrap is extremely high, the price is highly dependent on images and origin information.