Zamak alloys are a family of zinc-based die-casting materials widely used in precision manufacturing due to their excellent balance of strength, Efficienza in termini di costi, e colabilità. Among them, gli oneri 7 stands out as a high-purity variant designed for superior ductility and surface finish.
Compared to standard zinc alloys, gli oneri 7 offerte:
Migliorato formability and elongation
Meglio surface quality for plating and finishing
Enhanced resistenza alla corrosione due to reduced impurities
These characteristics make it particularly suitable for:
Thin-walled components
Geometrie complesse
High-precision industrial and electronic parts
Typical users include:
Mechanical engineers
Product designers
OEM sourcing managers
Procurement teams in automotive and electronics industries
What is Zamak 7?
gli oneri 7 is a high-purity zinc alloy composed primarily of zinc with aluminum, magnesio, and trace nickel additions. It is specifically engineered to provide enhanced ductility, excellent casting fluidity, and superior surface finish compared to other Zamak alloys.
È ampiamente usato in:
Precision die-cast components
Electronic housings
Parti automobilistiche
Decorative and plated products
Chemical Composition of Zamak 7
Typical Composition
| Elemento | Contenuto (%) | Funzione |
| Zinco (Zn) | Bilancia | Metallo comune, ensures castability |
| Alluminio (Al) | 3.5–4.3% | Forza, durezza, resistenza alla corrosione |
| Rame (Cu) | ≤ 0.25% | Improves strength (controlled to maintain ductility) |
| Magnesio (Mg) | 0.005–0.02% | Grain refinement, forza |
| Nichel (In) | 0.005–0.02% | Migliora la resistenza alla corrosione |
| Ferro (Fe) | ≤ 0.075% | Impurity, may reduce ductility |
| Guida (Pb) | ≤ 0.003% | Impurity, environmental concern |
| Cadmio (CD) | ≤ 0.002% | Impurity, corrosion risk |
| Lattina (Sn) | ≤ 0.001% | Impurity, brittleness risk |
Role of Alloying Elements (Engineering Insight)
Zinco (Zn): Provides excellent fluidity and enables high-speed die casting
Alluminio (Al): Enhances mechanical strength and corrosion resistance
Magnesio (Mg): Refines grain structure, improving toughness
Nichel (In): Key differentiator in Zamak 7—boosts corrosion resistance and surface stability
Rame (Cu): Carefully limited to maintain ductility
👉 Takeaway chiave: gli oneri 7 is optimized for duttilità + Qualità della superficie, not maximum strength.
Physical Properties of Zamak 7
| Proprietà | Valore |
| Densità | 6.6 g/cm³ |
| Punto di fusione | 381–387°C |
| Conduttività termica | 113 W/m·K |
| Conduttività elettrica | 27–30% IACS |
Interpretazione ingegneristica
Moderate density: Heavier than aluminum but lighter than steel—ideal for structural balance
Punto di fusione basso: Abilita energy-efficient die casting and faster production cycles
Buona conduttività termica: Adatto per heat-dissipating components
Moderate electrical conductivity: Not ideal for high-current applications, but useful for shielding and grounding
Mechanical Properties of Zamak 7
| Proprietà | Valore |
| Resistenza alla trazione | ~283 MPa |
| Forza di snervamento | ~221 MPa |
| Allungamento | ~13% |
| Brinell Hardness | ~80 HB |
| Colabilità | Eccellente |
Performance Analysis
Elevata duttilità (13% elongation):
Enables bending, crimping, and post-processing without cracking
Balanced strength:
Suitable for structural and semi-load-bearing components
Surface durability:
Hardness ensures resistance to wear in consumer and industrial parts
Exceptional castability:
Ideale per:
Thin-wall parts
Intricate geometries
Produzione ad alto volume
Key Benefits of Zamak 7 Lega
Enhanced Ductility
gli oneri 7 offers significantly better elongation than Zamak 3 e Zamak 5, making it ideal for components requiring post-casting deformation.
Finitura superficiale superiore
Smooth surfaces directly from pressofusione
Eccellente per:
Galvanotecnica
Rivestimento in polvere
Finiture decorative
Eccellente resistenza alla corrosione
Thanks to its high purity and nickel addition:
Performs well in indoor and controlled environments
Reduces long-term maintenance costs
Non-Sparking Property
A critical advantage for:
Hazardous environments
Olio & gas applications
Industrial safety components
Elevato rapporto resistenza/peso
Fornisce:
Structural reliability
Reduced overall product weight
Efficienza dei costi
Low melting temperature → reduced energy cost
High die-casting efficiency → lower unit cost
Minimal machining required
gli oneri 7 vs Other Zamak Alloys
Comparison Table
| Proprietà | gli oneri 3 | gli oneri 5 | gli oneri 7 |
| Forza | Medio | Alto | Medio |
| Duttilità | Bene | Inferiore | Migliore |
| Finitura superficiale | Bene | Bene | Eccellente |
| Resistenza alla corrosione | Moderare | Meglio | Migliore |
| Colabilità | Eccellente | Bene | Superiore |
Selection Guide
Scegliere gli oneri 7 Quando:
Hai bisogno thin-wall or complex parts
La finitura superficiale è fondamentale (placcatura, estetica)
Post-processing (bending/crimping) is required
Scegliere gli oneri 5 Quando:
Higher mechanical strength is needed
Scegliere gli oneri 3 Quando:
Scopo generale, cost-sensitive production is sufficient
Applications of Zamak 7
Industria automobilistica
Precision brackets
Interior components
Lightweight structural parts
Industria elettronica
Connector housings
Shielding enclosures
Heat-dissipating components
👉 Particularly relevant for terminal and connector manufacturers
Equipaggiamento industriale
Mechanical fittings
Tool components
Piccole parti di precisione
Prodotti di consumo
Decorative hardware
Locks and handles
Wear-resistant housings
Manufacturing Considerations
Die Casting Advantages
High-speed mass production
Eccellente precisione dimensionale
Minimal post-processing
Lavorazione & Finitura
Facile da lavorare
Excellent plating adhesion
Supports multiple finishing options
Thin-Wall Capability
gli oneri 7 is ideal for:
Geometrie complesse
Lightweight designs
Cost-efficient material usage
Limitations of Zamak 7
For engineering decision-making, it’s critical to understand limitations:
Not suitable for high-temperature environments
Lower electrical conductivity than copper/aluminum
Moderate creep resistance under long-term load
👉 This ensures proper material selection and avoids failure risks.
How to Choose the Right Zamak Alloy
Decision Factors
| Requisito | Recommended Alloy |
| Elevata duttilità | gli oneri 7 |
| Molta forza | gli oneri 5 |
| Cost-effective general use | gli oneri 3 |
| Best surface finish | gli oneri 7 |
Quick Checklist
Do you need post-processing (bending/crimping)? → Zamak 7
Is plating quality critical? → Zamak 7
Is strength the priority? → Zamak 5
Conclusione
gli oneri 7 offers a unique combination of ductility, castability, resistenza alla corrosione, e qualità della superficie, making it one of the best choices for precision die-cast componenti.
It is especially valuable for:
Geometrie complesse
Thin-wall designs
High-end surface finishing applications
For engineers and sourcing managers, gli oneri 7 represents a cost-effective and reliable material solution for modern manufacturing needs.
Get Custom Zamak 7 Parti
If you are developing Componenti di precisione, connector parts, or custom metal housings, choosing the right manufacturing partner is just as important as selecting the material.
Sosteniamo:
Custom Zamak 7 pressofusione
Lavorazione CNC & secondary processing
Finitura superficiale (placcatura, rivestimento, lucidatura)
Low-volume prototyping to mass production
Send us your drawings or specifications today to get:
Fast quotation
DFM (Progettazione per la produzione) feedback
Cost optimization suggestions
👉 Contact us now to start your project.
Domande frequentiS
Q1: What is Zamak 7 usato per?
gli oneri 7 is used for precision die-cast components, Soprattutto in elettronica, parti automobilistiche, and decorative applications requiring high surface quality.
Q2: Is Zamak 7 better than Zamak 5?
gli oneri 7 offers better ductility and surface finish, while Zamak 5 provides higher strength. The choice depends on application requirements.
Q3: Is Zamak 7 resistente alla corrosione?
SÌ, gli oneri 7 has enhanced corrosion resistance due to its high purity and nickel content.
