Zamak alloys are a family of zinc-based die-casting materials widely used in precision manufacturing due to their excellent balance of strength, рентабилност, и леярство. Among them, тежестите 7 stands out as a high-purity variant designed for superior ductility and surface finish.
Compared to standard zinc alloys, тежестите 7 предлага:
Подобрен formability and elongation
По -добре surface quality for plating and finishing
Enhanced устойчивост на корозия due to reduced impurities
These characteristics make it particularly suitable for:
Thin-walled components
Сложни геометрии
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?
тежестите 7 is a high-purity zinc alloy composed primarily of zinc with aluminum, магнезий, and trace nickel additions. It is specifically engineered to provide enhanced ductility, excellent casting fluidity, and superior surface finish compared to other Zamak alloys.
Той се използва широко в:
Precision die-cast components
Електронни корпуси
Автомобилни части
Decorative and plated products
Chemical Composition of Zamak 7
Типичен състав
| елемент | Съдържание (%) | функция |
| Цинк (Zn) | Баланс | Основен метал, ensures castability |
| Алуминий (Ал) | 3.5–4.3% | Сила, твърдост, устойчивост на корозия |
| Мед (Cu) | ≤ 0.25% | Improves strength (controlled to maintain ductility) |
| Магнезий (Mg) | 0.005–0.02% | Grain refinement, сила |
| никел (в) | 0.005–0.02% | Подобрява устойчивостта на корозия |
| Желязо (Fe) | ≤ 0.075% | Impurity, may reduce ductility |
| Водя (Pb) | ≤ 0.003% | Impurity, environmental concern |
| Кадмий (Cd) | ≤ 0.002% | Impurity, corrosion risk |
| Калай (сн) | ≤ 0.001% | Impurity, brittleness risk |
Role of Alloying Elements (Engineering Insight)
Цинк (Zn): Provides excellent fluidity and enables high-speed die casting
Алуминий (Ал): Enhances mechanical strength and corrosion resistance
Магнезий (Mg): Refines grain structure, improving toughness
никел (в): Key differentiator in Zamak 7—boosts corrosion resistance and surface stability
Мед (Cu): Carefully limited to maintain ductility
👉 Ключово извличане: тежестите 7 is optimized for пластичност + Качество на повърхността, not maximum strength.
Physical Properties of Zamak 7
| Имот | Стойност |
| Плътност | 6.6 g/cm³ |
| Точка на топене | 381–387°C |
| Топлопроводимост | 113 W/m·K |
| Електропроводимост | 27–30% IACS |
Инженерна интерпретация
Moderate density: Heavier than aluminum but lighter than steel—ideal for structural balance
Ниска точка на топене: Активира energy-efficient die casting and faster production cycles
Добра топлопроводимост: Подходящ за heat-dissipating components
Moderate electrical conductivity: Not ideal for high-current applications, but useful for shielding and grounding
Mechanical Properties of Zamak 7
| Имот | Стойност |
| Издръжливост на опън | ~283 MPa |
| Сила на провлачване | ~221 MPa |
| Удължение | ~13% |
| Твърдост по Бринел | ~80 HB |
| Леене | Отлично |
Performance Analysis
Висока пластичност (13% удължаване):
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:
Идеален за:
Thin-wall parts
Intricate geometries
Масово производство
Key Benefits of Zamak 7 Сплав
Enhanced Ductility
тежестите 7 offers significantly better elongation than Zamak 3 и замак 5, making it ideal for components requiring post-casting deformation.
Превъзходно покритие на повърхността
Smooth surfaces directly from леене под налягане
Отличен за:
Галванопластика
Прахово покритие
Декоративни облицовки
Отлична устойчивост на корозия
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
Масло & gas applications
Industrial safety components
Високо съотношение на якост към тегло
Осигурява:
Structural reliability
Reduced overall product weight
Ефективност на разходите
Low melting temperature → reduced energy cost
High die-casting efficiency → lower unit cost
Minimal machining required
тежестите 7 vs Other Zamak Alloys
Comparison Table
| Имот | тежестите 3 | тежестите 5 | тежестите 7 |
| Сила | Среден | високо | Среден |
| Пластичност | добре | По-ниска | Най-доброто |
| Повърхностно покритие | добре | добре | Отлично |
| Устойчивост на корозия | Умерен | По -добре | Най-доброто |
| Леене | Отлично | добре | Превъзходен |
Selection Guide
Изберете тежестите 7 кога:
Имате нужда thin-wall or complex parts
Повърхностното покритие е критично (обшивка, естетика)
Post-processing (bending/crimping) is required
Изберете тежестите 5 кога:
Higher mechanical strength is needed
Изберете тежестите 3 кога:
С общо предназначение, cost-sensitive production is sufficient
Applications of Zamak 7
Автомобилна индустрия
Precision brackets
Interior components
Lightweight structural parts
Електронна индустрия
Connector housings
Shielding enclosures
Heat-dissipating components
👉 Particularly relevant for terminal and connector manufacturers
Индустриално оборудване
Mechanical fittings
Tool components
Малки прецизни части
Потребителски продукти
Decorative hardware
Locks and handles
Wear-resistant housings
Manufacturing Considerations
Die Casting Advantages
High-speed mass production
Отлична точност на размерите
Minimal post-processing
Машинна обработка & Довършителни работи
Лесен за обработка
Excellent plating adhesion
Supports multiple finishing options
Thin-Wall Capability
тежестите 7 is ideal for:
Сложни геометрии
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
| Изискване | Recommended Alloy |
| Висока пластичност | тежестите 7 |
| Висока якост | тежестите 5 |
| Cost-effective general use | тежестите 3 |
| Best surface finish | тежестите 7 |
Quick Checklist
Do you need post-processing (bending/crimping)? → Zamak 7
Is plating quality critical? → Zamak 7
Is strength the priority? → Zamak 5
Заключение
тежестите 7 offers a unique combination of ductility, castability, устойчивост на корозия, и качество на повърхността, making it one of the best choices for precision die-cast компоненти.
It is especially valuable for:
Сложни геометрии
Thin-wall designs
High-end surface finishing applications
For engineers and sourcing managers, тежестите 7 represents a cost-effective and reliable material solution for modern manufacturing needs.
Get Custom Zamak 7 Части
If you are developing Прецизни компоненти, connector parts, or custom metal housings, choosing the right manufacturing partner is just as important as selecting the material.
Ние подкрепяме:
Custom Zamak 7 леене под налягане
CNC обработка & вторична обработка
Повърхностно завършване (обшивка, покритие, полиране)
Low-volume prototyping to mass production
Send us your drawings or specifications today to get:
Fast quotation
DFM (Дизайн за производство) Обратна връзка
Cost optimization suggestions
👉 Contact us now to start your project.
ЧЗВs
Q1: What is Zamak 7 използва се за?
тежестите 7 is used for precision die-cast components, особено в електрониката, автомобилни части, and decorative applications requiring high surface quality.
Q2: Is Zamak 7 better than Zamak 5?
тежестите 7 offers better ductility and surface finish, while Zamak 5 provides higher strength. The choice depends on application requirements.
Q3: Is Zamak 7 Корозионна устойчива?
да, тежестите 7 has enhanced corrosion resistance due to its high purity and nickel content.
