Lega di zinco 3, commonly known as gli oneri 3, is the most widely used zinc alloy in the pressofusione industria. Thanks to its excellent balance of **mechan industry. Thanks to its excellent balance of prestazioni meccaniche, castability, Efficienza dei costi, and surface finishing capability, it has become the default choice for manufacturers across automotive, elettronica, beni di consumo, e settori industriali.
Infatti, over 70–80% of zinc die-cast components in North America are made from Zamak 3, making it the industry benchmark material.
This guide is designed for:
OEM product designers
Mechanical and electrical engineers
Procurement and sourcing professionals
If you are evaluating materials for Componenti di precisione, connettori, alloggiamenti, o parti strutturali, this article will help you understand whether Zamak 3 is the right choice.
What is Zinc Alloy 3 (gli oneri 3)?
gli oneri 3 è un zinc-based alloy primarily used in high-pressure die casting. It belongs to the Zamak family, which derives its name from the German words:
Zink
UNluminium
Magnesium
Kupfer (Rame)
Among all Zamak alloys, gli oneri 3 is considered the standard grade due to its excellent combination of forza, duttilità, e stabilità dimensionale.
Why Zamak 3 Dominates the Market
Exceptional casting performance
Stable mechanical properties over time
Minimal internal stresses
Conveniente per la produzione di grandi volumi
Compared to other zinc alloys, gli oneri 3 offers a balanced profile, making it suitable for a wide range of applications without requiring material upgrades.
Chemical Composition of Zinc Alloy 3
Standard Composition
| Elemento | Contenuto (%) |
| Zinco (Zn) | ~96% |
| Alluminio (Al) | 3.9 – 4.3% |
| Magnesio (Mg) | 0.03 – 0.06% |
| Rame (Cu) | ≤ 0.1% |
| Ferro (Fe) | 0.03 – 0.035% |
| Guida (Pb) | ≤ 0.004% |
| Lattina (Sn) | ≤ 0.0015% |
| Silicio (E) | ≤ 0.02% |
| Nichel (In) | ≤ 0.001% |
Role of Each Element
Understanding the role of each element is critical for engineers making material decisions:
Zinco (Zn):
Acts as the base metal, providing corrosion resistance and excellent castability.
Alluminio (Al):
Enhances strength, durezza, and fluidity during casting.
Magnesio (Mg):
Improves corrosion resistance and reduces oxidation.
Rame (Cu):
Increases strength and wear resistance but is kept low to maintain ductility.
Trace Elements (Fe, Pb, Sn, In, E):
Carefully controlled to prevent impurities and ensure long-term stability.
Key Properties of Zinc Alloy 3
Proprietà fisiche
| Proprietà | Valore |
| Melting Range | 381 – 387°C |
| Densità | ~6.6 g/cm³ |
| Conduttività termica | ~113 W/m·K |
| Conduttività elettrica | ~27% IACS |
| Dilatazione termica | ~27.4 µm/m·K |
Engineering Significance
Punto di fusione basso → reduced energy consumption in casting
Alta conduttività termica → ideal for heat dissipation components
Dimensional stability → suitable for tight tolerance parts
Proprietà meccaniche
| Proprietà | Valore |
| Resistenza alla trazione | ~283 MPa |
| Forza di snervamento | ~221 MPa |
| Durezza | ~82 HB |
| Allungamento | ~10% |
Approfondimenti sulle prestazioni
Good balance of strength and ductility
Adatto per componenti portanti
Maintains performance over time due to aging stability
Why These Properties Matter
For OEMs and engineers, these properties translate into:
Prestazioni affidabili sotto stress
Capability to produce geometrie complesse
Reduced risk of deformation over time
Consistent quality in mass production
Advantages of Zamak 3
Superior Castability
gli oneri 3 offerte excellent fluidity, permettendoglielo:
Fill complex molds easily
Produce thin-wall structures
Achieve high dimensional accuracy
This reduces machining requirements and lowers overall production costs.
Long-Term Dimensional Stability
Unlike some metals that deform over time, gli oneri 3:
Maintains tight tolerances
Resists creep and fatigue
Ensures long service life
Questo lo rende ideale per Componenti di precisione.
Excellent Surface Finishing
gli oneri 3 is highly compatible with:
Galvanotecnica (nichel, cromo, zinco)
Rivestimento in polvere
Pittura
Chromate treatment
This is critical for industries requiring aesthetic and corrosion-resistant finishes.
Efficacia dei costi
From a procurement perspective, gli oneri 3 offerte:
Lower raw material cost than many alternatives
High production efficiency in die casting
Riciclabilità (reducing waste and cost)
This makes it a high ROI material for mass production.
Elevata resistenza alla corrosione
gli oneri 3 performs well in:
Humid environments
Outdoor conditions (with coating)
Industrial applications
Its corrosion resistance reduces maintenance and extends product lifespan.
Applications of Zinc Alloy 3
Elettrico & Industria elettronica
gli oneri 3 is widely used for:
Connectors and terminals
Switch housings
Involucri elettrici
Perché?
It offers buona conduttività, precisione, and shielding performance.
Industria automobilistica
Typical applications include:
Parentesi
Maniglie delle porte
Interior components
Engine-related parts
Key advantage: forza + dimensional stability under vibration and stress.
Beni di consumo
gli oneri 3 is used in:
Hardware (serrature, cerniere)
Articoli decorativi
Jewelry and accessories
Articoli sportivi
Its ability to achieve high-quality finishes makes it ideal for visible parts.
Equipaggiamento industriale
Applications include:
Precision mechanical parts
Assemblies and housings
Functional components requiring tight tolerances
gli oneri 3 vs Other Zinc Alloys
gli oneri 3 contro gli oneri 5
| Caratteristica | gli oneri 3 | gli oneri 5 |
| Forza | Moderare | Più alto |
| Duttilità | Più alto | Inferiore |
| Applicazione | General use | High strength parts |
Conclusione:
Choose Zamak 5 when strength is critical, but Zamak 3 for balanced performance.
gli oneri 3 contro gli oneri 7
| Caratteristica | gli oneri 3 | gli oneri 7 |
| Fluidity | Bene | Eccellente |
| Casting Complexity | Standard | Thin-wall/complex |
| Purezza | Standard | Più alto |
Conclusione:
gli oneri 7 is better for ultra-thin or complex designs, but Zamak 3 remains more cost-effective.
When to Choose Zamak 3
gli oneri 3 is the best choice when you need:
Efficienza dei costi
Reliable performance
Standard structural strength
Produzione ad alto volume
Manufacturing Considerations
Processo di pressofusione
gli oneri 3 is primarily used in pressofusione ad alta pressione (HPDC):
Molten metal injected into steel molds
Rapid cooling for high productivity
Eccellente finitura superficiale
Tooling and Mold Design
Initial mold cost is higher
Ideale per large production volumes
Long mold life reduces cost per part
Shrinkage and Tolerance
Low shrinkage rate (~0.007 in/in)
Supports tight tolerances
Reduces secondary machining
Opzioni di finitura superficiale
Galvanotecnica (nichel, cromo)
Rivestimento in polvere
Pittura
These enhance appearance and corrosion resistance.
Domande frequentiS
1. What is Zamak 3 usato per?
gli oneri 3 is used for die-cast components in settore automobilistico, elettronica, hardware, e industrie dei beni di consumo.
2. Is Zamak 3 resistente alla corrosione?
SÌ, especially when combined with surface treatments like plating or coating.
3. Can Zamak 3 be plated or painted?
Assolutamente. It is one of the best zinc alloys for surface finishing processes.
4. What is the difference between Zamak 3 e Zamak 5?
gli oneri 5 offers higher strength, while Zamak 3 provides better ductility and cost efficiency.
5. Is Zamak 3 suitable for electrical components?
SÌ. It offers good conductivity and precision, making it ideal for connectors and housings.
Conclusione
Lega di zinco 3 (gli oneri 3) remains the industry standard for zinc die casting per il suo:
Proprietà meccaniche equilibrate
Ottima colabilità
Efficienza dei costi
Versatility across industries
Whether you are designing a connector, staffa, alloggio, or decorative component, gli oneri 3 provides a reliable and scalable solution.
Perché scegliere Massima precisione for Zamak 3 Parti
When sourcing Zamak 3 componenti, choosing the right manufacturer is critical.
A Massima precisione, offriamo:
Advanced die casting capabilities
Strict quality control (ISO standards)
Custom OEM/ODM solutions
Engineering support from design to production
Competitive pricing for bulk orders
Request a Quote Today
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