CuZn37Pb2: The Go-To Brass Alloy for Strength and Versatility

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Innehållsförteckning

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, och styrka, making it a popular choice for applications ranging from automotive components till 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 och mechanical properties to its applications, Fördelar, och Begränsningar. We’ll also dive into prissättning, suppliers, and include a detailed FAQ section to ensure you have a complete understanding of this versatile brass alloy.


Översikt

CuZn37Pb2 is a free-cutting brass alloy that contains approximately 37% zinc (Zn) och 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 styrka och korrosionsbeständighet, which is why CuZn37Pb2 is used in a variety of industries, including automotive, construction, och plumbing.

Key Features :

  • Outstanding machinability: The presence of lead improves free-cutting properties, which is crucial for automated and high-speed machining applications.
  • God korrosionsbeständighet: While it may not be suitable for highly corrosive environments like seawater, CuZn37Pb2 performs well in freshwater och moderate environments.
  • Strong and ductile: The addition of zinc och copper offers a good balance between styrka och ductility, making it suitable for components that require deformation during manufacturing.
  • Kostnadseffektivt: Compared to other high-performance alloys, CuZn37Pb2 is relatively affordable, making it a popular choice for manufacturers looking for a balance between performance och cost.

Sammansättning och egenskaper

Understanding the chemical composition och 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.

Kemisk sammansättning

ElementProcentuell andel (%)
Koppar (Cu)60 – 63
Zink (Zn)35 – 37
Bly (Pb)1.5 – 2.5
Järn (Fe)≤ 0.1
Övriga elementTrace amounts

Den copper-zinc combination gives CuZn37Pb2 its styrka, 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

FastighetVärde
Draghållfasthet300 – 450 MPa
Utbyteshållfasthet150 – 200 MPa
Töjning20 – 30%
Täthet8.4 g/cm³
Hardness (HB)80 – 115 HB
Termisk konduktivitet120 W/m·K
Elektrisk konduktivitet28% IACS
Smältpunkt880 – 920°C

Key Characteristics :

  • Bearbetbarhet: Thanks to the lead content, CuZn37Pb2 is one of the most machinable brass alloys available, making it ideal for high-speed machining och automated processes.
  • Motståndskraft mot korrosion: While not as corrosion-resistant as bronze eller stainless steel, CuZn37Pb2 performs well in freshwater applications och moderate atmospheric conditions.
  • Strength and Ductility: CuZn37Pb2 offers a good balance of styrka och ductility, making it suitable for components that require both deformation och structural integrity during and after manufacturing.

Tillämpningar

CuZn37Pb2’s combination of machinability, styrka, och korrosionsbeständighet makes it a go-to material in a variety of industries. Here’s a look at where and how CuZn37Pb2 is commonly used.

Vanliga tillämpningar

IndustriTypiska tillämpningar
FordonFuel injectors, valve components, connectors
PlumbingFittings, faucets, valve bodies, couplings
MaskinbearbetningBushings, precision gears, fasteners
KonstruktionArchitectural fittings, decorative hardware
ElektriskTerminals, connectors, switchgear components
Flyg- och rymdindustrinNon-critical components, hydraulic fittings

Why CuZn37Pb2 is a Popular Choice for These Applications

  1. Fordon: CuZn37Pb2’s excellent machinability allows for the precise manufacturing of valves och fuel injectors, which require tight tolerances and high reliability.
  2. Plumbing: Given its moderate corrosion resistance, CuZn37Pb2 is frequently used in fittings, faucets, och valve bodies, where durability and cost-effectiveness are critical.
  3. Maskinbearbetning: CuZn37Pb2’s ability to be machined into bushings, gears, och fasteners with high precision makes it a preferred material for automated processes that require high repeatability.
  4. Konstruktion: The alloy’s styrka och ductility allow it to be formed into architectural fittings och decorative hardware, providing both aesthetic appeal och durability.
  5. Elektrisk: Although not as conductive as pure copper, CuZn37Pb2’s moderate electrical conductivity och machinability make it suitable for terminals och connectors in electrical systems.
  6. Flyg- och rymdindustrin: While CuZn37Pb2 may not be used in critical aerospace components, it finds applications in hydraulic fittings and other non-critical parts where machinability och styrka are more important than extreme performance.

Specifikationer, storlekar och standarder

It is available in various forms, sizes, och standards to meet the specific demands of different industries. Below is an overview of the most common forms and specifications.

Common Standards and Specifications

SpecifikationBeskrivning
ASTM B455Standard for brass and bronze rod, bar, and shapes
EN 12164European standard for copper and copper alloys
DIN 17660German standard for wrought copper alloys
JIS H3250Japanese standard for brass rods

Tillgängliga storlekar och former

FormStorleksintervall
StavarDiameter: 5 mm to 150 mm
Sheets/PlatesThickness: 0.5 mm to 50 mm
RörDiameter: 6 mm to 100 mm
LedningarDiameter: 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.


Leverantörer och prissättning

Priset på CuZn37Pb2 can vary depending on factors like supplier location, order quantity, och current market prices for copper and zinc. Below is a table detailing typical pricing and a list of reliable suppliers.

Leverantörer och prissättning

LeverantörPlatsPrisintervall (per kg)Ledtid
ThyssenKrupp MaterialsTyskland$9 – $201-3 weeks
Aviva MetalsUSA$11 – $222-4 weeks
Shanghai Metal CorpKina$7 – $193-5 weeks
Smiths Metal CentresSTORBRITANNIEN£8 – £181-2 veckor

Factors Affecting CuZn37Pb2 Pricing

  1. Market Conditions: The price of copper och zinc fluctuates based on global supply and demand, which directly affects the cost of CuZn37Pb2.
  2. Beställning Antal: Buying in bulk often results in discounted prices, while smaller orders may incur a higher price per kilogram.
  3. Material Form: Sheets and custom-cut sizes typically cost more than standard rods eller bars due to additional processing costs.
  4. Shipping and Location: Shipping fees och import/export taxes can also affect the final price, especially when ordering from international suppliers.

Fördelar och begränsningar

Before selecting CuZn37Pb2 for your project, it’s important to understand both its Fördelar och Begränsningar. While this alloy offers many benefits, it’s not always the perfect solution for every application.

Fördelar och begränsningar

FördelarBegränsningar
Utmärkt maskinbearbetbarhet: Lead improves free-cutting properties, making it ideal for high-speed machining.Måttlig korrosionsbeständighet: CuZn37Pb2 performs well in freshwater but may not be suitable for highly corrosive environments like seawater.
Goda mekaniska egenskaper: 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).
Kostnadseffektivt: 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.
Mångsidiga tillämpningar: 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, och cost.

CuZn37Pb2 Compared to Other Brass Alloys

FastighetCuZn37Pb2CuZn36Pb2CuZn40Pb2CuZn38 (C38500)
Draghållfasthet300 – 450 MPa300 – 400 MPa320 – 450 MPa280 – 420 MPa
BearbetbarhetUtmärktUtmärktMycket braBra
Motståndskraft mot korrosionBraMåttligBraMåttlig
Elektrisk konduktivitet28% IACS25% IACS22% IACS30% IACS
FormbarhetBraMycket braBraMycket bra

Key Comparisons:

  • CuZn37Pb2 vs. CuZn36Pb2: Both alloys have excellent machinability due to their lead content, but CuZn37Pb2 offers slightly better korrosionsbeständighet, making it a better choice for outdoor eller plumbing applications.
  • CuZn37Pb2 vs. CuZn40Pb2: CuZn40Pb2 has marginally higher draghållfasthet, 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.

Vanliga frågor och svar (FAQ)

To help you better understand CuZn37Pb2, here are some of the most frequently asked questions regarding its properties, uses, and performance.

FrågaSvar
What is it used for?It is widely used in automotive, plumbing, och construction industries due to its machinability och korrosionsbeständighet.
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 och 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 draghållfasthet 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.

Slutsats

It is a versatile and high-performance brass alloy that offers outstanding machinability, good corrosion resistance, och moderate strength, making it ideal for a wide range of applications in industries like automotive, plumbing, och construction. Whether you’re manufacturing precision parts, valves, or connectors, it delivers the reliability och cost-effectiveness needed for high-speed production environments.

While it may not be suitable for highly corrosive environments eller drinking water systems due to its lead content, it excels in areas where precision, durability, och machinability are critical. Its balance of styrka och ductility makes it a favorite among engineers and manufacturers who need to produce high-quality components with minimal waste.

By understanding the sammansättning, properties, och applications of CuZn37Pb2, you can confidently make the right choice for your next project, knowing that this alloy will deliver performance, mångsidighet, och value.

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