When it comes to materials that have stood the test of time, SG-CuSn (Tin Bronze) is a classic. This incredible alloy, known for its durability and versatility, has been used in everything from ancient tools to modern high-performance components. But what makes SG-CuSn so special? Why is it still a go-to choice for industries ranging from marine engineering to aerospace?
In this comprehensive guide, we’ll dive deep into everything you need to know about SG-CuSn. We’ll explore its composition, mechanical properties, applications, Giá cả, and even how it stacks up against other copper alloys. Whether you’re an engineer, a designer, or simply curious about materials, this guide will give you the detailed insights you need to make informed decisions.
Tổng quan
It is a tin bronze alloy that consists primarily of copper (Cu) and tin (Sn), with small amounts of other elements like zinc, lead, and sometimes phosphorus. The addition of tin significantly improves the alloy’s strength, corrosion resistance, Và wear resistance, making it an ideal material for applications where durability and performance are key.
One of the standout characteristics of SG-CuSn is its high frictional resistance, which makes it a popular choice for bearings, gears, Và bushings. It also performs exceptionally well in marine environments thanks to its excellent corrosion resistance in saltwater.
In this guide, we’ll break down the composition, properties, Và applications of SG-CuSn in detail. But before that, let’s start by looking at its chemical makeup and how each element contributes to its performance.
Composition and Properties
At its core, SG-CuSn is a copper-tin alloy with varying amounts of other elements depending on the specific grade. The presence of tin enhances the alloy’s mechanical properties, while the addition of other elements like phosphorus can further improve its wear resistance and castability.
Thành phần hóa học
| Yếu tố | Percentage (%) |
|---|---|
| Đồng (CU) | 86.0 – 89.0 |
| Tin (Sn) | 10.0 – 12.0 |
| Kẽm (Zn) | ≤ 0.5 |
| Lead (Pb) | ≤ 0.2 |
| Phốt pho (P) | ≤ 0.2 |
The high tin content (10-12%) is what gives SG-CuSn its high strength and excellent corrosion resistance. The small amounts of zinc and lead improve the alloy’s machinability, while phosphorus can be added to improve fluidity during casting.
Mechanical and Physical Properties
| Tài sản | Giá trị |
|---|---|
| Sức căng | 250 – 350 MPa |
| Sức mạnh năng suất | 150 – 250 MPa |
| Kéo dài | 10 – 20% |
| Tỉ trọng | 8.8 g/cm³ |
| Hardness (HB) | 70 – 110 HB |
| Dẫn nhiệt | 50 – 60 W/m·K |
| Tinh dân điện | 12% IACS |
| Độ nóng chảy | 930 – 950°C |
SG-CuSn’s mechanical properties make it ideal for high-load applications, while its thermal conductivity and electrical conductivity are adequate for components that require some degree of heat dissipation or current flow.
Các ứng dụng
The versatility of SG-CuSn means it can be found in a wide range of industrial applications. The alloy’s high strength, wear resistance, Và corrosion resistance make it ideal for components subjected to high friction or harsh environments. Let’s take a closer look at the most common applications of SG-CuSn.
Các ứng dụng phổ biến
| Ngành công nghiệp | Các ứng dụng tiêu biểu |
|---|---|
| Marine Engineering | Propeller shafts, pump impellers, valve bodies |
| Không gian vũ trụ | Bearings, gear components, bushings |
| Ô tô | Bearings, gears, valve guides |
| Sự thi công | Structural supports, fasteners, and fittings |
| Dầu và khí | Pump components, valves, bushings |
| Heavy Machinery | Wear-resistant components, gears, and bearings |
Detailed Application Breakdown:
- Marine Engineering: SG-CuSn’s corrosion resistance makes it a perfect choice for marine environments, especially for components like propeller shafts, pump impellers, Và valve bodies that are constantly exposed to saltwater.
- Không gian vũ trụ: In the aerospace industry, weight and durability are critical.It is often used in bearings, gear components, Và bushings, where its wear resistance and strength help maintain performance in high-stress environments.
- Ô tô: In automotive applications, it is used in bearings, gears, Và valve guides due to its ability to withstand high friction and continuous wear.
- Heavy Machinery: SG-CuSn’s wear-resistant properties make it ideal for use in heavy machinery, especially for parts that experience constant friction and pressure such as gears and bearings.
Specifications, Sizes, and Standards
When selecting SG-CuSn for your project, it’s essential to understand the specifications, sizes, Và standards that govern its use. These standards ensure that the alloy meets the required performance characteristics for your specific application, whether it’s a marine valve or an automotive bearing.
Common Standards and Sizes
| Tiêu chuẩn | Sự miêu tả |
|---|---|
| ASTM B505 | Specification for copper-base alloy continuous castings |
| EN 1982 | European standard for copper and copper alloy castings |
| DIN 1705 | German standard for tin bronzes |
| ISO 428 | International standard for copper-tin alloys |
Available Forms and Sizes
| Hình thức | Phạm vi kích thước |
|---|---|
| Rods | Diameter: 10 mm to 250 mm |
| Plates | Thickness: 5 mm to 100 mm |
| Bars | Diameter: 20 mm to 400 mm |
| Tubes | Diameter: 15 mm to 150 mm |
| Custom Shapes | Available upon request |
Custom Sizes and Shapes
Many suppliers offer custom sizes and shapes of SG-CuSn to meet the specific needs of various industrial applications. Whether you’re manufacturing large-scale machinery or small precision components,it can be tailored to fit your project requirements.
Price and Suppliers
The price of SG-CuSn can vary based on factors such as market conditions, order volume, and the specific form of the material. Here, we’ve compiled a list of suppliers and pricing details to give you a better understanding of what to expect when sourcing SG-CuSn for your project.
Nhà cung cấp và giá cả
| Nhà cung cấp | Vị trí | Price Range (per kg) | Lead Time |
|---|---|---|---|
| LKM Metals | nước Đức | $10 – $14 | 2-4 weeks |
| Aviva Metals | Hoa Kỳ | $11 – $16 | 1-3 weeks |
| Shanghai Metal Corporation | Trung Quốc | $9 – $13 | 3-5 weeks |
| Smiths Metal Centres | Vương quốc Anh | £8 – £12 | 1-2 weeks |
Factors Affecting SG-CuSn Pricing
Several factors influence the final cost of SG-CuSn:
- Market Conditions: Like many metal alloys, the price of SG-CuSn is influenced by global commodity markets, particularly the prices of copper and tin.
- Khối lượng đặt hàng: Bulk orders often receive discounts, while smaller orders may incur higher costs per kilogram.
- Processing Requirements: If you need specialized processing, such as cutting or machining, these services may add to the overall cost.
- Shipping and Delivery: Depending on the supplier’s location, shipping costs can also impact the final price, especially for international orders.
Advantages and Limitations
While SG-CuSn has numerous benefits, it’s important to also understand its limitations. Below, we’ve outlined the advantages and disadvantages of using SG-CuSn in various applications.
Advantages and Limitations
| Thuận lợi | Giới hạn |
|---|---|
| Kháng mặc tuyệt vời: Ideal for high-friction applications like bearings and gears. | Moderate machinability: it is harder to machine compared to other copper alloys, requiring specialized tools. |
| Kháng ăn mòn vượt trội: Performs well in harsh environments and saltwater. | Higher cost: it is more expensive compared to other copper alloys. |
| Cường độ cao: Provides strong mechanical properties for load-bearing applications. | Heavy material: The density of SG-CuSn makes it heavier than some alternatives like aluminum or titanium. |
| Ổn định nhiệt: Performs well in both high and low-temperature environments. | Limited electrical conductivity: While not a major concern for mechanical parts, it is not ideal for electrical applications. |
SG-CuSn vs. Other Copper Alloys
It’s crucial to compare SG-CuSn with other copper alloys to understand where it excels and where it may not be the best choice. Below, we compare SG-CuSn with some commonly used copper alloys in terms of strength, corrosion resistance, Và cost.
SG-CuSn vs. Other Copper Alloys
| Hợp kim | SG-CuSn | CuSn10 | CuAl8 | CuZn10 |
|---|---|---|---|---|
| Tin Content | 10-12% | 8-10% | 0% | 0% |
| Chống ăn mòn | Excellent in harsh environments | Excellent in seawater | Tốt | Vừa phải |
| Khả năng gia công | Vừa phải | Vừa phải | Tốt | Xuất sắc |
| Trị giá | Trung bình | Cao | Trung bình | Thấp |
Key Comparisons:
- SG-CuSn vs. CuSn10: Both alloys offer excellent corrosion resistance, but CuSn10 is slightly more expensive and offers slightly higher strength. SG-CuSn is more versatile for general-purpose use.
- SG-CuSn vs. CuAl8: CuAl8 provides higher strength and better performance in high-stress environments, but SG-CuSn excels in marine applications due to its superior corrosion resistance.
- SG-CuSn vs. CuZn10: CuZn10 is a more affordable option with better machinability, but it lacks the corrosion resistance and wear resistance of SG-CuSn, making it less suitable for marine or high-wear applications.
Câu hỏi thường gặp (Câu hỏi thường gặp)
To wrap up, here are some frequently asked questions about SG-CuSn to clarify common inquiries and provide quick and useful information:
| Question | Answer |
|---|---|
| What is it used for? | It is primarily used in marine engineering, aerospace, automotive, Và heavy machinery due to its wear resistance and corrosion resistance. |
| Is it suitable for marine environments? | Yes, it offers excellent corrosion resistance in saltwater, making it ideal for marine components like propeller shafts and valve bodies. |
| What is the tensile strength of SG-CuSn? | It has a tensile strength ranging from 250 to 350 MPa, depending on the processing and application. |
| Can it be machined easily? | It has moderate machinability and may require special cutting tools, especially for precision applications. |
| How does SG-CuSn compare to CuSn10? | While it offers higher strength, SG-CuSn provides better cost-efficiency and is easier to source for general applications. |
| Is it used in aerospace applications? | Yes, it is used in aerospace components such as bushings and gear parts due to its wear resistance and durability. |
| What are the main advantages of SG-CuSn? | It offers excellent wear resistance, high strength, Và corrosion resistance, especially in harsh environments. |
Phần kết luận
In conclusion, it is a highly versatile and durable alloy that excels in applications requiring wear resistance, high strength, Và corrosion protection. From marine engineering to aerospace and automotive, it has proven to be a reliable material in demanding environments. Its thermal stability, mechanical properties, Và resistance to harsh conditions make it an essential material for various industrial applications.
By understanding the composition, properties, Và applications of SG-CuSn, you can make informed decisions on whether this alloy is the right fit for your project. With its robust characteristics and proven performance, it continues to be a go-to material for industries that demand excellence in their components.
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