CuZn39Pb2: En omfattande titt på denna branschledande legering

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Innehållsförteckning

When it comes to materials that balance styrka, machinability, och korrosionsbeständighet, CuZn39Pb2 stands out as a versatile and reliable brass alloy. Whether you’re working in automotive manufacturing, plumbing, or electrical engineering, CuZn39Pb2 has a proven track record across a wide range of industries. But what makes this brass alloy so special? How does it compare to other materials, and why should you consider it for your next project?

In this comprehensive guide, we’ll dive deep into everything you need to know about CuZn39Pb2. We’ll cover its sammansättning, properties, applications, specifications, och prissättning. Plus, we’ll compare it to other alloys and discuss its advantages and limitations. By the end of this article, you’ll have a full understanding of how CuZn39Pb2 can meet your material needs.


Översikt

CuZn39Pb2 is a brass alloy consisting mainly of copper (Cu), zinc (Zn), and a small amount of lead (Pb). The alloy is often referred to as free-cutting brass due to the presence of lead, which significantly improves its machinability. This makes it an ideal material for precision components that require extensive machining without compromising on performance.

Key Features :

  • High machinability: The addition of lead improves cutting performance, reducing tool wear and manufacturing costs.
  • Måttlig styrka: Balances styrka och ductility, making it suitable for parts that require both durability and the ability to deform without breaking.
  • God korrosionsbeständighet: Suitable for use in freshwater, mildly acidic, och alkaline environments.
  • Excellent formability: Can be easily shaped through processes like bending, drawing, och stamping, making it versatile for a wide variety of applications.

Sammansättning och egenskaper

Den sammansättning of CuZn39Pb2 is carefully designed to provide optimal machinability, workability, och korrosionsbeständighet. Let’s break down the chemical makeup and discuss its important mechanical and physical properties.

Kemisk sammansättning

ElementProcentuell andel (%)
Koppar (Cu)59 – 60
Zink (Zn)38 – 39
Bly (Pb)1.5 – 2.5
Järn (Fe)≤ 0.1
Övriga elementTrace amounts

Mechanical and Physical Properties

FastighetVärde
Draghållfasthet350 – 450 MPa
Utbyteshållfasthet150 – 300 MPa
Töjning25 – 30%
Täthet8.47 g/cm³
Hardness (HB)80 – 120 HB
Termisk konduktivitet120 W/m·K
Elektrisk konduktivitet27% IACS
Smältpunkt870 – 900°C

Notable Properties

  • Bearbetbarhet: The lead content (up to 2.5%) significantly improves machinability, allowing for faster cutting speeds and longer tool life. This makes CuZn39Pb2 ideal for high-precision parts that require detailed machining.
  • Motståndskraft mot korrosion: While not as corrosion-resistant as pure copper, CuZn39Pb2 performs well in environments such as freshwater, lightly acidic, och alkaline atmospheres.
  • Användbarhet: CuZn39Pb2 is easy to cold work, meaning it can be bent, drawn, and shaped without cracking, which is important for complex part designs.
  • Thermal and Electrical Conductivity: CuZn39Pb2 offers good thermal conductivity, making it suitable for heat transfer applications, and its elektrisk ledningsförmåga is suitable for low-power electrical components.

Tillämpningar

CuZn39Pb2’s combination of machinability, styrka, och korrosionsbeständighet makes it a popular choice across many industries. Whether you’re designing automotive parts, plumbing fixtures, or electrical connectors, CuZn39Pb2 offers the versatility to meet your manufacturing needs.

Vanliga tillämpningar

IndustriTypiska tillämpningar
FordonFuel connectors, valve bodies, sensor housings
PlumbingFittings, valves, faucets, pipe connectors
ElektriskTerminals, connectors, switch components
MaskinerGears, bushings, precision mechanical parts
Flyg- och rymdindustrinFasteners, hydraulic components, electrical connectors
KonsumentvarorDecorative hardware, locks, keys, door handles

Why CuZn39Pb2 Is Preferred for These Applications

  1. Fordon: CuZn39Pb2’s excellent machinability allows for the production of complex fuel connectors och sensor housings with tight tolerances. The alloy’s good corrosion resistance ensures durability in engine environments.
  2. Plumbing: CuZn39Pb2’s korrosionsbeständighet och formability make it ideal for fittings, valves, och pipe connectors that come into contact with water och steam.
  3. Elektrisk: With its decent elektrisk ledningsförmåga, CuZn39Pb2 is frequently used in connectors och terminals. Its machinability allows for the creation of precise, intricate electrical components.
  4. Maskiner: CuZn39Pb2 is often used for bushings och gears that require both styrka och machinability. Its ability to withstand wear and tear makes it useful for high-precision mechanical components.

Specifikationer, storlekar och standarder

Like any engineering material, CuZn39Pb2 is available in various sizes, grades, och forms to meet different manufacturing requirements. Below are the most common specifications och standards for CuZn39Pb2.

Common Specifications and Standards

SpecifikationBeskrivning
ASTM B16Standard for free-cutting brass 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

These sizes can be customized to meet the specific needs of different applications, and manufacturers often offer cut-to-size services to ensure that the material fits the exact specifications of your project.


Leverantörer och prissättning

Pricing for CuZn39Pb2 can vary based on factors such as form (e.g., rods, sheets, tubes), supplier location, och market conditions. Below is a general overview of common suppliers and typical pricing for CuZn39Pb2.

Suppliers and Price Range

LeverantörPlatsPrisintervall (per kg)Ledtid
ThyssenKruppTyskland$12 – $261-3 weeks
Aviva MetalsUSA$13 – $282-4 weeks
Shanghai Metal CorpKina$9 – $203-5 weeks
Smiths Metal CentresSTORBRITANNIEN£10 – £241-2 veckor

Factors Influencing CuZn39Pb2 Pricing

  • Form: Pricing can vary widely depending on whether you are purchasing rods, sheets, or tubes, with more processed forms generally costing more.
  • Supplier Location: Depending on where the supplier is located, shipping costs och import duties can significantly impact the total price.
  • Market Conditions: The prices of copper och zinc fluctuate based on global demand och commodity markets, which in turn affects the price of CuZn39Pb2.

Fördelar och begränsningar

Like all materials, it has its strengths and weaknesses. Understanding these can help you determine whether it’s the right fit for your project.

Fördelar och begränsningar

FördelarBegränsningar
Utmärkt maskinbearbetbarhet: Lead improves cutting performance, making CuZn39Pb2 ideal for high-precision machining.Lead content: The presence of lead may be restricted in certain industries, particularly those involving potable water.
God korrosionsbeständighet: Suitable for use in freshwater and mildly acidic environments.Corrosive environments: CuZn39Pb2 is not suitable for highly corrosive environments such as seawater or aggressive chemicals.
Kostnadseffektivt: Compared to higher copper alloys, CuZn39Pb2 is more affordable, balancing performance and price.Lägre styrka: CuZn39Pb2 may not offer the same strength as other brass alloys, limiting its use in high-load applications.
God elektrisk ledningsförmåga: Suitable for low-power electrical components.Not ideal for high-current applications: Due to its lower conductivity compared to pure copper, it’s not suitable for high-current electrical uses.
Formbarhet: Can be easily cold-worked into a variety of shapes, making it versatile for different applications.Environmental concerns: The lead content may pose environmental and health concerns during disposal and recycling.

Comparing CuZn39Pb2 with Other Brass Alloys

When selecting the right material for your project, it’s important to compare it with other similar materials. Below, we’ll take a look at how CuZn39Pb2 stacks up against other brass alloys in terms of styrka, machinability, and other key properties.

CuZn39Pb2 Compared to Other Brass Alloys

FastighetCuZn39Pb2CuZn36Pb2CuZn40Pb2CuZn37 (CW508L)
Draghållfasthet350 – 450 MPa350 – 480 MPa350 – 470 MPa330 – 450 MPa
BearbetbarhetUtmärktUtmärktUtmärktBra
Motståndskraft mot korrosionBraBraBraMåttlig
Elektrisk konduktivitet27% IACS26 – 30% IACS25% IACS27% IACS
FormbarhetBraBraBraMycket bra

Key Comparisons

  • CuZn39Pb2 vs. CuZn36Pb2: Both alloys offer excellent machinability due to the presence of lead, but CuZn36Pb2 can offer slightly higher tensile strength, making it better suited for applications requiring a bit more strength.
  • CuZn39Pb2 vs. CuZn40Pb2: CuZn40Pb2 is very similar to CuZn39Pb2 in terms of machinability och korrosionsbeständighet, but CuZn40Pb2 might be preferred for applications requiring higher draghållfasthet.
  • CuZn39Pb2 vs. CuZn37: CuZn37 offers better formability, making it ideal for parts that require extensive bending or drawing. However, CuZn39Pb2 excels in machinability, making it the better choice for high-precision machined components.

Vanliga frågor och svar (FAQ)

To help you better understand CuZn39Pb2, here are answers to some commonly asked questions.

FrågaSvar
What is it used for?It is widely used in automotive parts, plumbing fixtures, electrical connectors, och precision machined components.
How much lead is in it?It contains between 1.5% to 2.5% lead, which improves machinability but may limit its use in certain applications.
Is it easy to machine?Yes, it has excellent machinability, making it ideal for parts that require detailed machining and precision.
Can it be used in potable water systems?Due to its lead content, CuZn39Pb2 may not comply with certain regulations for potable water systems, so alternatives may be required.
What is the tensile strength of it?It typically has a draghållfasthet ranging from 350 to 450 MPa, making it strong enough for many mechanical applications.
Is it resistant to corrosion?Yes, it offers good corrosion resistance in freshwater and mild environments, but it may not be suited for highly corrosive settings like seawater.

Slutsats

It is a versatile, high-performance brass alloy that offers an excellent balance of machinability, styrka, och korrosionsbeständighet. Its lead content makes it ideal for precision machining, while its good formability allows it to be shaped into complex parts. Whether you’re working in automotive, plumbing, or electrical industries, CuZn39Pb2 provides reliability och cost-effectiveness.

While it may not be suited for highly corrosive environments eller potable water systems due to its lead content, it remains an excellent choice for various other applications. By understanding its sammansättning, properties, och Begränsningar, you can confidently use it in your next project, knowing that it will deliver the performance you need.

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