Zamak alloys are a family of zinc-based die-casting materials widely used in precision manufacturing due to their excellent balance of strength, 費用効率, キャスタビリティ. Among them, 重荷 7 stands out as a high-purity variant designed for superior ductility and surface finish.
Compared to standard zinc alloys, 重荷 7 offers:
改善 formability and elongation
より良い surface quality for plating and finishing
Enhanced 耐食性 due to reduced impurities
These characteristics make it particularly suitable for:
Thin-walled components
複雑な形状
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?
重荷 7 is a high-purity zinc alloy composed primarily of zinc with aluminum, マグネシウム, and trace nickel additions. It is specifically engineered to provide enhanced ductility, excellent casting fluidity, and superior surface finish compared to other Zamak alloys.
で広く使用されています:
Precision die-cast components
Electronic housings
自動車部品
Decorative and plated products
Chemical Composition of Zamak 7
代表的な構成
| 要素 | コンテンツ (%) | 関数 |
| 亜鉛 (亜鉛) | バランス | Base metal, ensures castability |
| アルミニウム (アル) | 3.5–4.3% | 強さ, 硬度, 耐食性 |
| 銅 (銅) | ≤ 0.25% | Improves strength (controlled to maintain ductility) |
| マグネシウム (マグネシウム) | 0.005–0.02% | Grain refinement, 強さ |
| ニッケル (で) | 0.005–0.02% | 耐食性を改善します |
| 鉄 (鉄) | ≤ 0.075% | Impurity, may reduce ductility |
| 鉛 (鉛) | ≤ 0.003% | Impurity, environmental concern |
| カドミウム (CD) | ≤ 0.002% | Impurity, corrosion risk |
| 錫 (SN) | ≤ 0.001% | Impurity, brittleness risk |
Role of Alloying Elements (Engineering Insight)
亜鉛 (亜鉛): Provides excellent fluidity and enables high-speed die casting
アルミニウム (アル): Enhances mechanical strength and corrosion resistance
マグネシウム (マグネシウム): Refines grain structure, improving toughness
ニッケル (で): Key differentiator in Zamak 7—boosts corrosion resistance and surface stability
銅 (銅): Carefully limited to maintain ductility
👉 重要なポイント: 重荷 7 is optimized for 延性 + 表面の品質, not maximum strength.
Physical Properties of Zamak 7
| 財産 | 価値 |
| 密度 | 6.6 g/cm3 |
| 融点 | 381–387°C |
| 熱伝導率 | 113 W/m・K |
| 電気伝導性 | 27–30% IACS |
Engineering Interpretation
Moderate density: Heavier than aluminum but lighter than steel—ideal for structural balance
低融点: 有効にします energy-efficient die casting and faster production cycles
Good thermal conductivity: に適しています heat-dissipating components
Moderate electrical conductivity: Not ideal for high-current applications, but useful for shielding and grounding
Mechanical Properties of Zamak 7
| 財産 | 価値 |
| 抗張力 | ~283 MPa |
| 降伏強さ | ~221 MPa |
| 伸長 | ~13% |
| ブリネル硬度 | ~80 HB |
| キャスタビリティ | 素晴らしい |
Performance Analysis
高い延性 (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:
に最適です:
Thin-wall parts
Intricate geometries
大量生産
Key Benefits of Zamak 7 合金
Enhanced Ductility
重荷 7 offers significantly better elongation than Zamak 3 そしてザマック 5, making it ideal for components requiring post-casting deformation.
優れた表面仕上げ
Smooth surfaces directly from ダイカスト
に最適です:
電気めっき
パウダーコーティング
装飾仕上げ
優れた腐食抵抗
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
油 & gas applications
Industrial safety components
高い強度重量比
Provides:
Structural reliability
Reduced overall product weight
コスト効率
Low melting temperature → reduced energy cost
High die-casting efficiency → lower unit cost
Minimal machining required
重荷 7 vs Other Zamak Alloys
Comparison Table
| 財産 | 重荷 3 | 重荷 5 | 重荷 7 |
| 強さ | 中くらい | 高い | 中くらい |
| 延性 | 良い | より低い | 最高 |
| 表面仕上げ | 良い | 良い | 素晴らしい |
| 耐食性 | 適度 | より良い | 最高 |
| キャスタビリティ | 素晴らしい | 良い | 優れた |
Selection Guide
選ぶ 重荷 7 when:
あなたが必要です thin-wall or complex parts
表面仕上げが重要です (メッキ, 美学)
Post-processing (bending/crimping) is required
選ぶ 重荷 5 when:
Higher mechanical strength is needed
選ぶ 重荷 3 when:
一般的用途, cost-sensitive production is sufficient
Applications of Zamak 7
自動車産業
Precision brackets
Interior components
Lightweight structural parts
エレクトロニクス産業
Connector housings
Shielding enclosures
Heat-dissipating components
👉 Particularly relevant for terminal and connector manufacturers
産業機器
Mechanical fittings
Tool components
Small precision parts
消費者向け製品
Decorative hardware
Locks and handles
Wear-resistant housings
Manufacturing Considerations
Die Casting Advantages
High-speed mass production
Excellent dimensional accuracy
Minimal post-processing
機械加工 & 仕上げ
機械加工が容易
Excellent plating adhesion
Supports multiple finishing options
Thin-Wall Capability
重荷 7 is ideal for:
複雑な形状
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
| Requirement | Recommended Alloy |
| 高い延性 | 重荷 7 |
| 高強度 | 重荷 5 |
| Cost-effective general use | 重荷 3 |
| Best surface finish | 重荷 7 |
Quick Checklist
Do you need post-processing (bending/crimping)? → Zamak 7
Is plating quality critical? → Zamak 7
Is strength the priority? → Zamak 5
結論
重荷 7 offers a unique combination of ductility, castability, 耐食性, および表面の品質, making it one of the best choices for precision die-cast コンポーネント.
It is especially valuable for:
複雑な形状
Thin-wall designs
High-end surface finishing applications
For engineers and sourcing managers, 重荷 7 represents a cost-effective and reliable material solution for modern manufacturing needs.
Get Custom Zamak 7 部品
If you are developing 精密コンポーネント, connector parts, or custom metal housings, choosing the right manufacturing partner is just as important as selecting the material.
私たちはサポートします:
Custom Zamak 7 ダイカスト
CNC加工 & 二次加工
表面仕上げ (メッキ, コーティング, 研磨)
Low-volume prototyping to mass production
Send us your drawings or specifications today to get:
Fast quotation
DFM (製造のための設計) フィードバック
Cost optimization suggestions
👉 Contact us now to start your project.
よくある質問s
Q1: What is Zamak 7 used for?
重荷 7 is used for precision die-cast components, 特に電子機器で, 自動車部品, and decorative applications requiring high surface quality.
第2四半期: Is Zamak 7 better than Zamak 5?
重荷 7 offers better ductility and surface finish, while Zamak 5 provides higher strength. The choice depends on application requirements.
Q3: Is Zamak 7 耐食性?
はい, 重荷 7 has enhanced corrosion resistance due to its high purity and nickel content.
