Zamak alloys are a family of zinc-based die-casting materials widely used in precision manufacturing due to their excellent balance of strength, Eficiência de custo, e moldabilidade. Among them, os fardos 7 stands out as a high-purity variant designed for superior ductility and surface finish.
Compared to standard zinc alloys, os fardos 7 offers:
Melhorou formability and elongation
Melhorar surface quality for plating and finishing
Enhanced resistência à corrosão due to reduced impurities
These characteristics make it particularly suitable for:
Thin-walled components
Geometrias complexas
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?
os fardos 7 is a high-purity zinc alloy composed primarily of zinc with aluminum, magnésio, and trace nickel additions. It is specifically engineered to provide enhanced ductility, excellent casting fluidity, and superior surface finish compared to other Zamak alloys.
É amplamente utilizado em:
Precision die-cast components
Caixas eletrônicas
Partes automotivas
Decorative and plated products
Chemical Composition of Zamak 7
Typical Composition
| Elemento | Contente (%) | Função |
| Zinco (Zn) | Equilíbrio | Base metal, ensures castability |
| Alumínio (Al) | 3.5–4.3% | Força, dureza, resistência à corrosão |
| Cobre (Cu) | ≤ 0.25% | Improves strength (controlled to maintain ductility) |
| Magnésio (mg) | 0.005–0.02% | Grain refinement, força |
| Níquel (Em) | 0.005–0.02% | Melhora a resistência à corrosão |
| Ferro (Fé) | ≤ 0.075% | Impurity, may reduce ductility |
| Liderar (Pb) | ≤ 0.003% | Impurity, environmental concern |
| Cádmio (Cd) | ≤ 0.002% | Impurity, corrosion risk |
| Estanho (Sn) | ≤ 0.001% | Impurity, brittleness risk |
Role of Alloying Elements (Engineering Insight)
Zinco (Zn): Provides excellent fluidity and enables high-speed die casting
Alumínio (Al): Enhances mechanical strength and corrosion resistance
Magnésio (mg): Refines grain structure, improving toughness
Níquel (Em): Key differentiator in Zamak 7—boosts corrosion resistance and surface stability
Cobre (Cu): Carefully limited to maintain ductility
👉 Takeaway -chave: os fardos 7 is optimized for ductilidade + qualidade da superfície, not maximum strength.
Physical Properties of Zamak 7
| Propriedade | Valor |
| Densidade | 6.6 g/cm³ |
| Ponto de fusão | 381–387°C |
| Condutividade térmica | 113 S/m·K |
| Condutividade elétrica | 27–30% IACS |
Engineering Interpretation
Moderate density: Heavier than aluminum but lighter than steel—ideal for structural balance
Baixo ponto de fusão: Ativa energy-efficient die casting and faster production cycles
Good thermal conductivity: Adequado para heat-dissipating components
Moderate electrical conductivity: Not ideal for high-current applications, but useful for shielding and grounding
Mechanical Properties of Zamak 7
| Propriedade | Valor |
| Resistência à tracção | ~283 MPa |
| Força de rendimento | ~221 MPa |
| Alongamento | ~13% |
| Dureza Brinell | ~80 HB |
| Castabilidade | Excelente |
Performance Analysis
Alta ductilidade (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:
Ideal para:
Thin-wall parts
Intricate geometries
Produção em alto volume
Key Benefits of Zamak 7 Liga
Enhanced Ductility
os fardos 7 offers significantly better elongation than Zamak 3 e Zamac 5, making it ideal for components requiring post-casting deformation.
Acabamento de superfície superior
Smooth surfaces directly from fundição sob pressão
Excellent for:
Galvanoplastia
Revestimento em pó
Acabamentos decorativos
Excelente resistência à corrosão
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
Óleo & gas applications
Industrial safety components
Alta relação resistência/peso
Fornece:
Structural reliability
Reduced overall product weight
Eficiência de custos
Low melting temperature → reduced energy cost
High die-casting efficiency → lower unit cost
Minimal machining required
os fardos 7 vs Other Zamak Alloys
Comparison Table
| Propriedade | os fardos 3 | os fardos 5 | os fardos 7 |
| Força | Médio | Alto | Médio |
| Ductilidade | Bom | Mais baixo | Melhor |
| Acabamento de superfície | Bom | Bom | Excelente |
| Resistência à corrosão | Moderado | Melhorar | Melhor |
| Castabilidade | Excelente | Bom | Superior |
Selection Guide
Escolher os fardos 7 when:
Você precisa thin-wall or complex parts
O acabamento da superfície é crítico (revestimento, estética)
Post-processing (bending/crimping) is required
Escolher os fardos 5 when:
Higher mechanical strength is needed
Escolher os fardos 3 when:
Uso geral, cost-sensitive production is sufficient
Applications of Zamak 7
Indústria automobilística
Precision brackets
Interior components
Lightweight structural parts
Indústria de eletrônicos
Connector housings
Shielding enclosures
Heat-dissipating components
👉 Particularly relevant for terminal and connector manufacturers
Equipamento industrial
Mechanical fittings
Tool components
Small precision parts
Produtos de consumo
Decorative hardware
Locks and handles
Wear-resistant housings
Manufacturing Considerations
Die Casting Advantages
High-speed mass production
Excelente precisão dimensional
Minimal post-processing
Usinagem & Acabamento
Fácil de usinar
Excellent plating adhesion
Supports multiple finishing options
Thin-Wall Capability
os fardos 7 is ideal for:
Geometrias complexas
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
| Exigência | Recommended Alloy |
| Alta ductilidade | os fardos 7 |
| Força elevada | os fardos 5 |
| Cost-effective general use | os fardos 3 |
| Best surface finish | os fardos 7 |
Quick Checklist
Do you need post-processing (bending/crimping)? → Zamak 7
Is plating quality critical? → Zamak 7
Is strength the priority? → Zamak 5
Conclusão
os fardos 7 offers a unique combination of ductility, castability, resistência à corrosão, e qualidade da superfície, making it one of the best choices for precision die-cast componentes.
It is especially valuable for:
Geometrias complexas
Thin-wall designs
High-end surface finishing applications
For engineers and sourcing managers, os fardos 7 represents a cost-effective and reliable material solution for modern manufacturing needs.
Get Custom Zamak 7 Peças
If you are developing componentes de precisão, connector parts, or custom metal housings, choosing the right manufacturing partner is just as important as selecting the material.
Nós apoiamos:
Custom Zamak 7 fundição sob pressão
Usinagem CNC & processamento secundário
Acabamento superficial (revestimento, revestimento, polimento)
Low-volume prototyping to mass production
Send us your drawings or specifications today to get:
Fast quotation
DFM (Design para fabricação) opinião
Cost optimization suggestions
👉 Contact us now to start your project.
Perguntas frequentesé
1º trimestre: What is Zamak 7 usado para?
os fardos 7 is used for precision die-cast components, especialmente em eletrônicos, partes automotivas, and decorative applications requiring high surface quality.
2º trimestre: Is Zamak 7 better than Zamak 5?
os fardos 7 offers better ductility and surface finish, while Zamak 5 provides higher strength. The choice depends on application requirements.
3º trimestre: Is Zamak 7 corrosion resistant?
Sim, os fardos 7 has enhanced corrosion resistance due to its high purity and nickel content.
