Цинкова сплав 3, commonly known as тежестите 3, is the most widely used zinc alloy in the леене под налягане индустрия. Thanks to its excellent balance of **mechan industry. Thanks to its excellent balance of механично изпълнение, castability, ефективност на разходите, and surface finishing capability, it has become the default choice for manufacturers across automotive, електроника, потребителски стоки, и индустриални сектори.
Всъщност, 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 Прецизни компоненти, конектори, корпуси, или структурни части, this article will help you understand whether Zamak 3 is the right choice.
What is Zinc Alloy 3 (тежестите 3)?
тежестите 3 е a zinc-based alloy primarily used in high-pressure die casting. It belongs to the Zamak family, which derives its name from the German words:
Зink
Аluminium
Magnesium
Кupfer (Мед)
Among all Zamak alloys, тежестите 3 is considered the standard grade due to its excellent combination of сила, пластичност, и стабилност на размерите.
Why Zamak 3 Dominates the Market
Exceptional casting performance
Stable mechanical properties over time
Minimal internal stresses
Рентабилен за производство в голям обем
Compared to other zinc alloys, тежестите 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
| елемент | Съдържание (%) |
| Цинк (Zn) | ~96% |
| Алуминий (Ал) | 3.9 – 4.3% |
| Магнезий (Mg) | 0.03 – 0.06% |
| Мед (Cu) | ≤ 0.1% |
| Желязо (Fe) | 0.03 – 0.035% |
| Водя (Pb) | ≤ 0.004% |
| Калай (сн) | ≤ 0.0015% |
| Силиций (и) | ≤ 0.02% |
| никел (в) | ≤ 0.001% |
Role of Each Element
Understanding the role of each element is critical for engineers making material decisions:
Цинк (Zn):
Acts as the base metal, providing corrosion resistance and excellent castability.
Алуминий (Ал):
Enhances strength, твърдост, and fluidity during casting.
Магнезий (Mg):
Improves corrosion resistance and reduces oxidation.
Мед (Cu):
Increases strength and wear resistance but is kept low to maintain ductility.
Trace Elements (Fe, Pb, сн, в, и):
Carefully controlled to prevent impurities and ensure long-term stability.
Key Properties of Zinc Alloy 3
Физически свойства
| Имот | Стойност |
| Melting Range | 381 – 387°C |
| Плътност | ~6.6 g/cm³ |
| Топлопроводимост | ~113 W/m·K |
| Електропроводимост | ~27% IACS |
| Термично разширение | ~27.4 µm/m·K |
Engineering Significance
Ниска точка на топене → reduced energy consumption in casting
Висока топлопроводимост → ideal for heat dissipation components
Dimensional stability → suitable for tight tolerance parts
Механични свойства
| Имот | Стойност |
| Издръжливост на опън | ~283 MPa |
| Сила на провлачване | ~221 MPa |
| твърдост | ~82 HB |
| Удължение | ~10% |
Прозрения за ефективността
Good balance of здравина и пластичност
Подходящ за load-bearing components
Maintains performance over time due to aging stability
Why These Properties Matter
For OEMs and engineers, these properties translate into:
Reliable performance under stress
Capability to produce сложни геометрии
Reduced risk of deformation over time
Consistent quality in mass production
Advantages of Zamak 3
Superior Castability
тежестите 3 предлага excellent fluidity, позволявайки му да:
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, тежестите 3:
Maintains tight tolerances
Resists creep and fatigue
Ensures long service life
Това го прави идеален за Прецизни компоненти.
Excellent Surface Finishing
тежестите 3 is highly compatible with:
Галванопластика (никел, хром, цинк)
Прахово покритие
Рисуване
Chromate treatment
This is critical for industries requiring aesthetic and corrosion-resistant finishes.
Ефективност на разходите
From a procurement perspective, тежестите 3 предлага:
Lower raw material cost than many alternatives
High production efficiency in die casting
Възможност за рециклиране (reducing waste and cost)
This makes it a high ROI material for mass production.
Висока устойчивост на корозия
тежестите 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
Електрически & Електронна индустрия
тежестите 3 is widely used for:
Конектори и терминали
Превключете корпусите
Електрически кутии
защо?
It offers добра проводимост, прецизност, and shielding performance.
Автомобилна индустрия
Типичните приложения включват:
Скоби
Дръжки за врати
Interior components
Engine-related parts
Key advantage: сила + dimensional stability under vibration and stress.
Потребителски стоки
тежестите 3 is used in:
Хардуер (ключалки, панти)
Декоративни елементи
Jewelry and accessories
Спортни стоки
Its ability to achieve high-quality finishes makes it ideal for visible parts.
Индустриално оборудване
Приложенията включват:
Precision mechanical parts
Assemblies and housings
Functional components requiring tight tolerances
тежестите 3 vs Other Zinc Alloys
тежестите 3 срещу тежестите 5
| Особеност | тежестите 3 | тежестите 5 |
| Сила | Умерен | По-високо |
| Пластичност | По-високо | По-ниска |
| Приложение | General use | High strength parts |
Заключение:
Choose Zamak 5 when strength is critical, but Zamak 3 for balanced performance.
тежестите 3 срещу тежестите 7
| Особеност | тежестите 3 | тежестите 7 |
| Fluidity | добре | Отлично |
| Casting Complexity | Стандартен | Thin-wall/complex |
| Чистота | Стандартен | По-високо |
Заключение:
тежестите 7 is better for ultra-thin or complex designs, but Zamak 3 remains more cost-effective.
When to Choose Zamak 3
тежестите 3 is the best choice when you need:
Ефективност на разходите
Reliable performance
Standard structural strength
Масово производство
Manufacturing Considerations
Die Casting Process
тежестите 3 is primarily used in леене под високо налягане (HPDC):
Molten metal injected into steel molds
Rapid cooling for high productivity
Отличен повърхностно покритие
Tooling and Mold Design
Initial mold cost is higher
Идеален за 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
Опции за довършване на повърхността
Галванопластика (никел, хром)
Прахово покритие
Рисуване
These enhance appearance and corrosion resistance.
ЧЗВs
1. What is Zamak 3 използва се за?
тежестите 3 is used for die-cast components in автомобилен, електроника, хардуер, и индустрията за потребителски стоки.
2. Is Zamak 3 Корозионна устойчива?
да, especially when combined with surface treatments like plating or coating.
3. Can Zamak 3 be plated or painted?
Абсолютно. It is one of the best zinc alloys for surface finishing processes.
4. What is the difference between Zamak 3 и замак 5?
тежестите 5 offers higher strength, while Zamak 3 provides better ductility and cost efficiency.
5. Is Zamak 3 suitable for electrical components?
да. It offers good conductivity and precision, making it ideal for connectors and housings.
Заключение
Цинкова сплав 3 (тежестите 3) remains the industry standard for zinc die casting Поради своето:
Balanced mechanical properties
Отлична леярска способност
Ефективност на разходите
Versatility across industries
Whether you are designing a connector, bracket, жилища, or decorative component, тежестите 3 provides a reliable and scalable solution.
Защо да изберете Най-висока точност for Zamak 3 Части
When sourcing Zamak 3 компоненти, choosing the right manufacturer is critical.
При Най-висока точност, Ние предлагаме:
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
Looking for a reliable supplier for тежестите 3 die casting parts?
Contact us today to:
Get a fast quotation
Optimize your design for manufacturing
Reduce your production costs
