Les alliages Zamak sont une famille de matériaux de moulage sous pression à base de zinc largement utilisés dans la fabrication de précision en raison de leur excellent équilibre de résistance., économie, et coulabilité. Among them, les fardeaux 7 stands out as a high-purity variant designed for superior ductility and surface finish.
Compared to standard zinc alloys, les fardeaux 7 offres:
Amélioré formability and elongation
Mieux surface quality for plating and finishing
Enhanced résistance à la corrosion due to reduced impurities
These characteristics make it particularly suitable for:
Thin-walled components
Géométries complexes
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?
les fardeaux 7 is a high-purity zinc alloy composed primarily of zinc with aluminum, magnésium, and trace nickel additions. It is specifically engineered to provide enhanced ductility, excellent casting fluidity, and superior surface finish compared to other Zamak alloys.
Il est largement utilisé dans:
Precision die-cast components
Boîtiers électroniques
Pièces automobiles
Decorative and plated products
Chemical Composition of Zamak 7
Composition typique
| Élément | Contenu (%) | Fonction |
| Zinc (Zn) | Équilibre | Base metal, ensures castability |
| Aluminium (Al) | 3.5–4.3% | Force, dureté, résistance à la corrosion |
| Cuivre (Cu) | ≤ 0.25% | Improves strength (controlled to maintain ductility) |
| Magnésium (Mg) | 0.005–0.02% | Grain refinement, force |
| Nickel (Dans) | 0.005–0.02% | Améliore la résistance à la corrosion |
| Fer (Fe) | ≤ 0.075% | Impurity, may reduce ductility |
| Plomb (Pb) | ≤ 0.003% | Impurity, environmental concern |
| Cadmium (CD) | ≤ 0.002% | Impurity, corrosion risk |
| Étain (Sn) | ≤ 0.001% | Impurity, brittleness risk |
Role of Alloying Elements (Engineering Insight)
Zinc (Zn): Provides excellent fluidity and enables high-speed die casting
Aluminium (Al): Enhances mechanical strength and corrosion resistance
Magnésium (Mg): Refines grain structure, improving toughness
Nickel (Dans): Key differentiator in Zamak 7—boosts corrosion resistance and surface stability
Cuivre (Cu): Carefully limited to maintain ductility
👉 À retenir: les fardeaux 7 is optimized for ductilité + qualité de surface, not maximum strength.
Physical Properties of Zamak 7
| Propriété | Valeur |
| Densité | 6.6 g/cm³ |
| Point de fusion | 381–387°C |
| Conductivité thermique | 113 W/m·K |
| Conductivité électrique | 27–30% IACS |
Engineering Interpretation
Moderate density: Heavier than aluminum but lighter than steel—ideal for structural balance
Point de fusion bas: Actif energy-efficient die casting and faster production cycles
Good thermal conductivity: Adapté à heat-dissipating components
Moderate electrical conductivity: Not ideal for high-current applications, but useful for shielding and grounding
Mechanical Properties of Zamak 7
| Propriété | Valeur |
| Résistance à la traction | ~283 MPa |
| Limite d'élasticité | ~221 MPa |
| Élongation | ~13% |
| Dureté Brinell | ~80 HB |
| Castabilité | Excellent |
Performance Analysis
Ductilité élevée (13% élongation):
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:
Idéal pour:
Thin-wall parts
Intricate geometries
Production à volume élevé
Key Benefits of Zamak 7 Alliage
Enhanced Ductility
les fardeaux 7 offers significantly better elongation than Zamak 3 et Zamak 5, making it ideal for components requiring post-casting deformation.
Finition de surface supérieure
Smooth surfaces directly from moulage sous pression
Excellent:
Galvanoplastie
Revêtement en poudre
Finitions décoratives
Excellente résistance à la corrosion
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
Huile & gas applications
Industrial safety components
Rapport résistance/poids élevé
Proposer:
Structural reliability
Reduced overall product weight
Rentabilité
Low melting temperature → reduced energy cost
High die-casting efficiency → lower unit cost
Minimal machining required
les fardeaux 7 vs Other Zamak Alloys
Comparison Table
| Propriété | les fardeaux 3 | les fardeaux 5 | les fardeaux 7 |
| Force | Moyen | Haut | Moyen |
| Ductilité | Bien | Inférieur | Meilleur |
| Finition de surface | Bien | Bien | Excellent |
| Résistance à la corrosion | Modéré | Mieux | Meilleur |
| Castabilité | Excellent | Bien | Supérieur |
Selection Guide
Choisir les fardeaux 7 when:
Vous avez besoin thin-wall or complex parts
La finition de surface est critique (placage, esthétique)
Post-processing (bending/crimping) is required
Choisir les fardeaux 5 when:
Higher mechanical strength is needed
Choisir les fardeaux 3 when:
Usage général, cost-sensitive production is sufficient
Applications of Zamak 7
Industrie automobile
Precision brackets
Interior components
Lightweight structural parts
Industrie électronique
Connector housings
Shielding enclosures
Heat-dissipating components
👉 Particularly relevant for terminal and connector manufacturers
Équipement industriel
Mechanical fittings
Tool components
Small precision parts
Produits de consommation
Decorative hardware
Locks and handles
Wear-resistant housings
Manufacturing Considerations
Die Casting Advantages
High-speed mass production
Excellent dimensional accuracy
Minimal post-processing
Usinage & Finition
Facile à usiner
Excellent plating adhesion
Supports multiple finishing options
Thin-Wall Capability
les fardeaux 7 is ideal for:
Géométries complexes
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
| Exigence | Recommended Alloy |
| Ductilité élevée | les fardeaux 7 |
| Haute résistance | les fardeaux 5 |
| Cost-effective general use | les fardeaux 3 |
| Best surface finish | les fardeaux 7 |
Quick Checklist
Do you need post-processing (bending/crimping)? → Zamak 7
Is plating quality critical? → Zamak 7
Is strength the priority? → Zamak 5
Conclusion
les fardeaux 7 offers a unique combination of ductility, castability, résistance à la corrosion, et qualité de surface, making it one of the best choices for precision die-cast composants.
It is especially valuable for:
Géométries complexes
Thin-wall designs
High-end surface finishing applications
For engineers and sourcing managers, les fardeaux 7 represents a cost-effective and reliable material solution for modern manufacturing needs.
Get Custom Zamak 7 Parties
If you are developing composants de précision, connector parts, or custom metal housings, choosing the right manufacturing partner is just as important as selecting the material.
Nous soutenons:
Custom Zamak 7 moulage sous pression
Usinage CNC & traitement secondaire
Finition de surface (placage, enrobage, polissage)
Low-volume prototyping to mass production
Send us your drawings or specifications today to get:
Fast quotation
DFM (Conception pour la fabrication) retour
Cost optimization suggestions
👉 Contact us now to start your project.
FAQs
T1: What is Zamak 7 utilisé pour?
les fardeaux 7 is used for precision die-cast components, Surtout en électronique, pièces automobiles, and decorative applications requiring high surface quality.
T2: Is Zamak 7 better than Zamak 5?
les fardeaux 7 offers better ductility and surface finish, while Zamak 5 provides higher strength. The choice depends on application requirements.
T3: Is Zamak 7 résistant à la corrosion?
Oui, les fardeaux 7 has enhanced corrosion resistance due to its high purity and nickel content.
