What is bronze castings
Bronze is an alloy formed by adding other alloying elements (such as tin, lead, etc.) to the base metal (Cu). It is a copper-tin alloy. It has excellent wear resistance and corrosion resistance. Depending on the alloy composition, bronze can be divided into the following main categories:
- Tin bronze: Copper and tin are the main components. It is the most typical bronze. It has good castability and corrosion resistance. It is often used to make bearings, gears, etc.
- Aluminum bronze: Aluminum is added. It has high strength and excellent corrosion resistance. It is especially suitable for seawater or chemical environments.
- Beryllium bronze: A bronze alloy containing beryllium. It has high hardness. Good elasticity. It is impact-resistant. It is mostly used in precision instruments and explosion-proof tools.
- Lead bronze: A bronze alloy containing lead. The presence of lead can improve cutting performance and wear resistance. It is often used to make sliding bearings.
Bronze castings refer to parts or products with specific shapes and functions made of bronze as the main material through casting processes such as melting, pouring, solidification and molding. Bronze is an ideal material for various industries due to its durability and heat resistance. As a leading bronze casting manufacturer, JC Casting provides a full range of services and is committed to providing the highest quality bronze castings.
Bronze casting characteristics
The characteristics and advantages of bronze are closely related to its composition and physical and chemical properties.
1. Good mechanical properties
– Bronze castings have high strength and hardness. They can withstand large loads and stresses.
– Bronze also has good toughness. It is not easy to break when subjected to impact and vibration.
– Bronze castings have excellent wear resistance. In relatively moving parts, bronze castings can reduce friction losses and extend service life. They are often used to manufacture wear-resistant parts such as bearings and bushings.
– Bronze material has good corrosion resistance. It has good corrosion resistance in the atmosphere, seawater, soil and other environments. It is suitable for castings in outdoor or humid environments.
2. Good casting properties
-Bronze has a low melting point. It is easy to melt and cast. It can reduce energy consumption and equipment requirements.
-Bronze also has good fluidity and filling capacity. It is suitable for making castings with fine shapes and complex structures.
-Bronze has a small shrinkage rate. The dimensional accuracy and surface quality of the castings are high. This makes it easier to control the quality and accuracy of bronze castings during the casting process. It is not easy to produce defects such as cracks.
3. Strong chemical stability
– Good anti-oxidation ability. It is not easy to be oxidized at room temperature. The oxide film formed on the surface of bronze can further protect the internal metal.
– Bronze’s resistance to chemical media such as acids and alkalis is better than most iron-based alloys. It is suitable for castings in the fields of chemical industry, marine engineering, etc.
As a casting material with a very long history. Bronze has its unique advantages in material application.
| Comparison Items | Bronze | Stainless Steel | Aluminum Alloy |
| Casting difficulty | Low (low melting point. good fluidity) | High (high melting point. large shrinkage) | Medium (medium melting point. prone to pores) |
| Abrasion resistance | Excellent (self-lubricating) | Medium (needs surface hardening) | Poor (needs coating or alloying to strengthen) |
| Seawater corrosion resistance | Excellent (tin bronze, etc.) | Good (316 stainless steel) | Poor (prone to electrochemical corrosion) |
| Cost | Medium (lower than high nickel stainless steel) | High (especially austenitic stainless steel) | Medium (high cost of high-end alloys) |
Common bronze alloy castings
| Grade | Type | Performance | Application |
| C862 | Manganese bronze | High hardness. High strength. Good wear resistance. Excellent corrosion resistance and machinability. | Gears, sleeves, valves, rudders, boat parts, bushings, brackets,etc. |
| C863 | Manganese bronze | Higher strength and hardness than C86200. Excellent wear resistance, corrosion resistance and oxidation resistance. | Valves/hydraulic parts, gears, worm gears, bearings, etc. |
| C903 | Tin bronze | Excellent casting performance. Good wear resistance and corrosion resistance. Good cutting processability. | Marine castings, pump impellers, piston rings, bearings and valve bodies, etc. |
| C905 | Tin bronze | High strength and hardness. Excellent wear resistance and corrosion resistance. Good castability. | High load bearings, bushings, gears, valves and pump parts, etc. |
| C958 | Lead bronze | Extremely high strength, hardness and wear resistance. Excellent corrosion resistance. | Ship propellers, valves, naval and marine parts, etc. |
| C876 | Silicon bronze | Good casting performance. Excellent corrosion resistance and impact resistance. Good electrical and thermal conductivity. | Valves, pipe fittings, pump bodies, wear-resistant bushings, etc. |
JC Casting Bronze Casting Applications
Due to its unique properties and advantages. Bronze castings are widely used in many industries.
(I) Mechanical manufacturing field
Bronze castings are widely used in the manufacture of various parts. Such as bearings, gears, nuts, etc. These parts use the wear resistance, friction reduction and good mechanical properties of bronze castings. Ensure the normal operation and service life of mechanical equipment.
(II) Shipbuilding and marine engineering fields
Bronze castings have excellent corrosion resistance and good mechanical properties. The rudder shaft, valves, pump bodies and other parts of ships are mostly made of bronze castings. To resist the corrosion of seawater and meet high-intensity working requirements.
(III) Architectural decoration field
Bronze castings are often used to make door handles, decorative ornaments, railings, etc. Its unique color and texture can enhance the overall quality and aesthetics of the building.
(IV) Power electronics field
Bronze castings can be used to manufacture conductive parts, connectors, heat sinks, etc. Bronze has good electrical and thermal conductivity. As well as certain strength and corrosion resistance. It can meet the performance requirements of power electronic equipment.
JC Casting’s Casting Process
Bronze casting alloys can be made from different materials. JC Casting mainly uses investment casting, sand casting and centrifugal casting to cast bronze castings.
Bronze investment casting
Use wax to make a wax mold that matches the shape of the casting. After carving patterns on the surface, wrap the wax mold layer by layer with refractory materials to form a solid shell. Heat the shell to melt the wax mold and leave a hollow cavity. Then inject molten bronze. After cooling, break the shell to get the casting. This method has high precision. It can be finely carved. It is suitable for small batch production. It is suitable for casting castings with complex overall structures.
Bronze sand casting
Molds are made with molding sand and molten liquid metal is poured into them. The mold is divided into upper sand mold and lower sand mold. A cavity is left in the sand mold. After the mold is closed, bronze liquid is poured from the pouring port. After cooling, the sand is broken and the parts are taken out. This method is low-cost. It is suitable for mass production. It is highly adaptable and can cast large, medium and small castings. However, the surface accuracy is low. Post-processing and polishing are required.
Bronze centrifugal casting
Pour the bronze liquid into the high-speed rotating mold. Use centrifugal force to make the metal liquid fill the mold cavity evenly. And remove gas and slag. The mold rotates around the horizontal, vertical or inclined axis. The centrifugal force makes the casting structure dense. And reduce defects such as shrinkage holes and pores. This method does not require pouring and risers, saving materials. High production efficiency. However, the equipment is complex and requires a special centrifuge. The mold cost is relatively high.
For different bronze casting applications and customer requirements. JC Casting uses different casting processes.
We are also able to provide value-added services such as polishing and electroplating for all bronze investment castings. Provide customers with the best experience.
Work with JC Casting
As a professional bronze caster and exporter. We provide a full range of services from design to delivery. We have been deeply involved in bronze casting production for more than 20 years. With advanced casting processes and technologies, JC Casting has become a leader in all-round foundries in China. We are committed to providing customers with the highest quality bronze castings. Whether it is ship accessories, building parts or automotive accessories. Our team can provide you with professional solution support. If you are looking for bronze castings with corrosion resistance and high strength. Please contact us. And send us your specifications. We will assist you with product design and alloy selection. Help you achieve your needs.
FAQ
1. What types of bronze castings can you provide?
We can stably supply a full range of castings such as tin bronze, aluminum bronze, beryllium bronze, etc. We are equipped with a professional design team that can quickly respond to customers’ customized needs. We also optimize according to customer drawings and technical parameters to ensure that customized castings are accurately adapted.
2. How does JC Casting ensure the quality of bronze castings?
We strictly implement the ISO 9001 quality management system. Each product passes multiple quality inspection processes such as X-ray flaw detection and mechanical properties testing before leaving the factory. We also hold many international certifications such as DNV. Ensure the provision of high-quality bronze castings.
3. What does JC Casting’s after-sales service include? JC Casting promises to respond to after-sales needs within 24 hours. And provide remote installation guidance. If there are quality problems with the product. We provide free return and exchange services. If the product fails due to workmanship problems during the warranty period, JC Casting promises to repair it free of charge.
4. How does JC Casting ensure the safety of bronze castings during transportation?
We use a multi-layer protective packaging solution. We will use bubble film and other protective films to fully cover the castings. For cushioning packaging. Then put them into wooden or iron packaging boxes. And fill them with shockproof materials to fix them again. If the goods are found to be damaged after arrival. We will immediately arrange for free re-issuance. And assist you in claiming compensation from the logistics company. Ensure that your rights and interests are not lost.