"Notice: Some images and content on this site are optimized via Cloudflare CDN, which may require a VPN for full access in China."
Die Casting Aluminum Alloys
I. Physical Properties
Die-casting aluminum alloys are characterized by lightweight, high fluidity, and excellent mechanical performance:
Lightweight
· Density: 2.6–2.8 g/cm³ (about 1/3 of steel), ideal for weight-sensitive applications.
Strength and Ductility
· Tensile strength: 200–350 MPa (some grades can exceed 400 MPa after heat treatment).
· Elongation: 3–10% (varies with alloy composition and casting process).
Superior Fluidity
· Excellent flow in molten state, suitable for complex thin-walled parts (minimum wall thickness: 0.5 mm).
Corrosion Resistance
· Forms a dense oxide layer (Al₂O₃) for atmospheric corrosion resistance; some grades support anodizing.
Thermal/Electrical Conductivity
· Thermal conductivity: 80–200 W/(m·K), ideal for heat dissipation components (e.g., electronics housings).
· Electrical conductivity: 30–60% IACS (International Annealed Copper Standard).
Machinability
· Easy to machine, with options for plating, coating, or laser engraving.
II. Main Die-Casting Aluminum Grades
Key grades by regional and international standards:
1. Common Grades in Asia (GB/JIS Standards)
· ADC12 (Al-Si-Cu series)
· Features: High fluidity, low cost; widely used in automotive parts (e.g., engine brackets).
· Composition: Si 9.6–12.0%, Cu 1.5–3.5%.
· ADC10 (Al-Si-Mg series)
· Features: High toughness; ideal for thin-walled components (e.g., consumer electronics).
· Composition: Si 7.5–9.5%, Mg 0.3–0.6%.
2. International Grades (AA/EN Standards)
· A380 (AA Standard)
· Features: High strength, heat resistance; used in automotive and industrial components.
· Tensile strength: ≥320 MPa, elongation ≥3%.
· A383 (AA Standard)
· Features: Low shrinkage; suitable for high-precision parts (e.g., medical devices).
· EN AC 46000 (EN Standard)
· Features: High silicon content (Si 8–11%), excellent wear resistance; used in gearbox housings.
3. Specialty Grades
· AlSi9Cu3(Fe)
· Features: High thermal conductivity; designed for heat sinks (e.g., 5G base stations).
· AlMg3
· Features: Superior corrosion resistance; ideal for marine or outdoor environments.
III. Selection Guidelines
· Automotive: Prioritize ADC12/A380 (balance of strength and cost).
· Consumer Electronics: Use ADC10/A383 (thin-wall precision casting).
· Thermal Management: Choose AlSi9Cu3(Fe) or custom high-conductivity alloys.
· Corrosive Environments: Opt for Mg-containing grades (e.g., AlMg3) or surface-treated alloys.
Properties and Main Grades of Die-Casting Aluminum Alloys


SERVICES
sales@shd-diecasting.com
Contact by
© 2025 SHD Precision Die Casting All rights reserved.


FOLLOW US
Tel:+86-755-2335 8353
PROCESS
ALLOYS
Marketing Office: No. 68 Shasong Road, Shajing Street, Bao'an District, Shenzhen, Guangdong Province
Factory Location: Room 118, No. 1046, Dalang Meijing Middle Road, Dalang Town, Dongguan City, Guangdong Province









