When it comes to versatile and machinable brass alloys, CuZn37Pb2 is one of the most commonly used materials across various industries. This lead-containing brass alloy offers an exceptional combination of machinability, corrosion resistance, และ strength, making it a popular choice for applications ranging from automotive components to plumbing systems. But what exactly makes CuZn37Pb2 so special? And how does it stack up against other brass alloys in terms of performance, cost, and applications?
In this comprehensive guide, we’ll explore everything you need to know about CuZn37Pb2, from its chemical composition and mechanical properties to its applications, advantages, และ limitations. We’ll also dive into การกำหนดราคา, suppliers, and include a detailed FAQ section to ensure you have a complete understanding of this versatile brass alloy.
ภาพรวม
CuZn37Pb2 is a free-cutting brass alloy that contains approximately 37% zinc (Zn) and 2% lead (Pb). The addition of lead significantly improves the alloy’s machinability, making it an excellent choice for high-speed machining. The copper (Cu) content gives it a good balance of strength and corrosion resistance, which is why CuZn37Pb2 is used in a variety of industries, including automotive, construction, และ plumbing.
Key Features :
- Outstanding machinability: The presence of lead improves free-cutting properties, which is crucial for automated and high-speed machining applications.
- ความต้านทานการกัดกร่อนที่ดี: While it may not be suitable for highly corrosive environments like seawater, CuZn37Pb2 performs well in freshwater and moderate environments.
- Strong and ductile: The addition of zinc and copper offers a good balance between strength and ductility, making it suitable for components that require deformation during manufacturing.
- Cost-effective: Compared to other high-performance alloys, CuZn37Pb2 is relatively affordable, making it a popular choice for manufacturers looking for a balance between performance and cost.
Composition and Properties
Understanding the chemical composition and physical properties of CuZn37Pb2 is crucial when selecting the right material for your project. Below, we break down its key elements and explore how each element contributes to the alloy’s performance.
องค์ประกอบทางเคมี
| องค์ประกอบ | Percentage (%) |
|---|---|
| ทองแดง (Cu) | 60 – 63 |
| สังกะสี (Zn) | 35 – 37 |
| Lead (Pb) | 1.5 – 2.5 |
| Iron (Fe) | ≤ 0.1 |
| Other Elements | Trace amounts |
The copper-zinc combination gives CuZn37Pb2 its strength, while the lead enhances its machinability. Trace amounts of iron and other elements may be present but do not significantly affect the alloy’s performance.
Mechanical and Physical Properties
| คุณสมบัติ | ค่า |
|---|---|
| แรงดึง | 300 – 450 MPa |
| ความแข็งแรงของผลผลิต | 150 – 200 MPa |
| การยืดตัว | 20 – 30% |
| ความหนาแน่น | 8.4 g/cm³ |
| Hardness (HB) | 80 – 115 HB |
| การนำความร้อน | 120 W/m·K |
| การนำไฟฟ้า | 28% IACS |
| จุดหลอมเหลว | 880 – 920°C |
Key Characteristics :
- ความสามารถกล: Thanks to the lead content, CuZn37Pb2 is one of the most machinable brass alloys available, making it ideal for high-speed machining and automated processes.
- ความต้านทานการกัดกร่อน: While not as corrosion-resistant as bronze or stainless steel, CuZn37Pb2 performs well in freshwater applications and moderate atmospheric conditions.
- Strength and Ductility: CuZn37Pb2 offers a good balance of strength and ductility, making it suitable for components that require both deformation and structural integrity during and after manufacturing.
แอปพลิเคชัน
CuZn37Pb2’s combination of machinability, strength, และ corrosion resistance makes it a go-to material in a variety of industries. Here’s a look at where and how CuZn37Pb2 is commonly used.
แอปพลิเคชันทั่วไป
| อุตสาหกรรม | แอปพลิเคชันทั่วไป |
|---|---|
| เกี่ยวกับยานยนต์ | Fuel injectors, valve components, connectors |
| Plumbing | Fittings, faucets, valve bodies, couplings |
| การตัดเฉือน | Bushings, precision gears, fasteners |
| การก่อสร้าง | Architectural fittings, decorative hardware |
| Electrical | Terminals, connectors, switchgear components |
| การบินและอวกาศ | Non-critical components, hydraulic fittings |
Why CuZn37Pb2 is a Popular Choice for These Applications
- เกี่ยวกับยานยนต์: CuZn37Pb2’s excellent machinability allows for the precise manufacturing of valves and fuel injectors, which require tight tolerances and high reliability.
- Plumbing: Given its moderate corrosion resistance, CuZn37Pb2 is frequently used in fittings, faucets, และ valve bodies, where durability and cost-effectiveness are critical.
- การตัดเฉือน: CuZn37Pb2’s ability to be machined into bushings, gears, และ fasteners with high precision makes it a preferred material for automated processes that require high repeatability.
- การก่อสร้าง: The alloy’s strength and ductility allow it to be formed into architectural fittings and decorative hardware, providing both aesthetic appeal and durability.
- Electrical: Although not as conductive as pure copper, CuZn37Pb2’s moderate electrical conductivity and machinability make it suitable for terminals and connectors in electrical systems.
- การบินและอวกาศ: While CuZn37Pb2 may not be used in critical aerospace components, it finds applications in hydraulic fittings and other non-critical parts where machinability and strength are more important than extreme performance.
Specifications, Sizes, and Standards
It is available in various forms, sizes, และ standards to meet the specific demands of different industries. Below is an overview of the most common forms and specifications.
Common Standards and Specifications
| ข้อมูลจำเพาะ | คำอธิบาย |
|---|---|
| ASTM B455 | Standard for brass and bronze rod, bar, and shapes |
| EN 12164 | European standard for copper and copper alloys |
| DIN 17660 | German standard for wrought copper alloys |
| JIS H3250 | Japanese standard for brass rods |
Available Sizes and Forms
| รูปร่าง | ช่วงขนาด |
|---|---|
| Rods | Diameter: 5 mm to 150 mm |
| Sheets/Plates | Thickness: 0.5 mm to 50 mm |
| Tubes | Diameter: 6 mm to 100 mm |
| Wires | Diameter: 0.5 mm to 10 mm |
Most suppliers offer custom-cut sizes to meet your specific project needs, helping to reduce material waste and optimize production.
ซัพพลายเออร์และราคา
The price of CuZn37Pb2 can vary depending on factors like supplier location, order quantity, และ current market prices for copper and zinc. Below is a table detailing typical pricing and a list of reliable suppliers.
ซัพพลายเออร์และราคา
| ผู้จัดหา | ที่ตั้ง | Price Range (per kg) | เวลานำ |
|---|---|---|---|
| ThyssenKrupp Materials | ประเทศเยอรมนี | $9 – $20 | 1-3 weeks |
| Aviva Metals | สหรัฐอเมริกา | $11 – $22 | 2-4 weeks |
| Shanghai Metal Corp | จีน | $7 – $19 | 3-5 weeks |
| Smiths Metal Centres | สหราชอาณาจักร | £8 – £18 | 1-2 weeks |
Factors Affecting CuZn37Pb2 Pricing
- Market Conditions: The price of copper and zinc fluctuates based on global supply and demand, which directly affects the cost of CuZn37Pb2.
- สั่งซื้อปริมาณ: Buying in bulk often results in discounted prices, while smaller orders may incur a higher price per kilogram.
- Material Form: Sheets and custom-cut sizes typically cost more than standard rods or bars due to additional processing costs.
- Shipping and Location: Shipping fees and import/export taxes can also affect the final price, especially when ordering from international suppliers.
Advantages and Limitations
Before selecting CuZn37Pb2 for your project, it’s important to understand both its advantages and limitations. While this alloy offers many benefits, it’s not always the perfect solution for every application.
Advantages and Limitations
| Advantages | ข้อ จำกัด |
|---|---|
| Excellent machinability: Lead improves free-cutting properties, making it ideal for high-speed machining. | Moderate corrosion resistance: CuZn37Pb2 performs well in freshwater but may not be suitable for highly corrosive environments like seawater. |
| Good mechanical properties: The copper-zinc combination provides an excellent balance of strength and ductility. | Lead content: While lead enhances machinability, it can limit use in applications requiring lead-free materials (e.g., drinking water systems). |
| Cost-effective: Offers an affordable alternative to more expensive alloys like nickel-brass. | Lower electrical conductivity: CuZn37Pb2’s conductivity is lower than pure copper or high-conductivity alloys, which may limit its use in high-performance electrical applications. |
| Versatile applications: Suitable for a wide range of industries, including automotive, plumbing, and electrical. | Recycling challenges: The presence of lead can complicate recycling processes or raise environmental concerns. |
Comparing CuZn37Pb2 with Other Brass Alloys
To make an informed decision, it’s essential to compare CuZn37Pb2 with other brass alloys available in the market. Let’s see how it stacks up against similar materials in terms of performance, properties, และ cost.
CuZn37Pb2 Compared to Other Brass Alloys
| คุณสมบัติ | CuZn37Pb2 | CuZn36Pb2 | CuZn40Pb2 | CuZn38 (C38500) |
|---|---|---|---|---|
| แรงดึง | 300 – 450 MPa | 300 – 400 MPa | 320 – 450 MPa | 280 – 420 MPa |
| ความสามารถกล | ยอดเยี่ยม | ยอดเยี่ยม | ดีมาก | ดี |
| ความต้านทานการกัดกร่อน | ดี | ปานกลาง | ดี | ปานกลาง |
| การนำไฟฟ้า | 28% IACS | 25% IACS | 22% IACS | 30% IACS |
| Formability | ดี | ดีมาก | ดี | ดีมาก |
Key Comparisons:
- CuZn37Pb2 vs. CuZn36Pb2: Both alloys have excellent machinability due to their lead content, but CuZn37Pb2 offers slightly better corrosion resistance, making it a better choice for outdoor or plumbing applications.
- CuZn37Pb2 vs. CuZn40Pb2: CuZn40Pb2 has marginally higher tensile strength, but CuZn37Pb2 is easier to machine, making it better suited for high-speed automated processes.
- CuZn37Pb2 vs. CuZn38 (C38500): CuZn38 offers better formability, but CuZn37Pb2 exceeds it in machinability, making it ideal for precision parts that require tight tolerances.
คำถามที่พบบ่อย (คำถามที่พบบ่อย)
To help you better understand CuZn37Pb2, here are some of the most frequently asked questions regarding its properties, uses, and performance.
| คำถาม | คำตอบ |
|---|---|
| What is it used for? | It is widely used in automotive, plumbing, และ construction industries due to its machinability and corrosion resistance. |
| Why is lead included in CuZn37Pb2? | Lead improves the alloy’s machinability, making it easier to machine into complex parts without compromising precision. |
| Is it corrosion-resistant? | Yes, it offers good corrosion resistance in freshwater and moderate environments, though it may not be suitable for highly corrosive conditions. |
| Can it be used in drinking water systems? | Due to its lead content, it is generally not recommended for drinking water systems. |
| What is the tensile strength of CuZn37Pb2? | It has a tensile strength ranging from 300 to 450 MPa, depending on the form and processing method. |
| Is it easy to machine? | Yes, the lead content in CuZn37Pb2 makes it highly machinable, allowing for easy cutting, shaping, and drilling. |
บทสรุป
It is a versatile and high-performance brass alloy that offers outstanding machinability, good corrosion resistance, และ moderate strength, making it ideal for a wide range of applications in industries like automotive, plumbing, และ construction. Whether you’re manufacturing precision parts, valves, or connectors, it delivers the reliability and cost-effectiveness needed for high-speed production environments.
While it may not be suitable for highly corrosive environments or drinking water systems due to its lead content, it excels in areas where precision, durability, และ machinability are critical. Its balance of strength and ductility makes it a favorite among engineers and manufacturers who need to produce high-quality components with minimal waste.
By understanding the composition, properties, และ applications of CuZn37Pb2, you can confidently make the right choice for your next project, knowing that this alloy will deliver performance, versatility, และ value.
Maybe you want to know more about our products, please contact us