EN AC-44300
Material Introduction
EN AC-44300 is a high-purity aluminum–silicon casting alloy designed for applications requiring superior pressure tightness, excellent corrosion resistance, and strong dimensional stability. With its balanced silicon content and controlled impurity levels, EN AC-44300 performs exceptionally well in aluminum die casting, especially where fluid sealing, leak prevention, and long-term environmental durability are critical. The alloy is widely used in compressor housings, hydraulic components, valve bodies, precision fluid-handling devices, and mechanically loaded industrial assemblies. When produced through Neway’s optimized die-casting processes—including vacuum-assisted filling, targeted cooling channels, and precision tool and die design—EN AC-44300 enables high repeatability, minimal porosity, and reliable mechanical performance for medium- and high-volume manufacturing.
Alternative Material Options
When specific operating conditions require alternative properties, several alloys may be used as substitutes for EN AC-44300. For higher strength and better thermal stability, EN AC-46000 (AlSi9Cu3) is ideal for automotive powertrain castings. For improved ductility and enhanced fatigue performance, EN AC-43500 (AlSi10Mg) provides excellent elongation. If extreme wear resistance is required, A390 offers superior hardness and durability. For general-purpose casting where cost efficiency is important, A380 or A383/ADC12 are suitable alternatives. For decorative aesthetics or high conductivity applications, copper-based copper-brass alloys or Brass 380 can be selected.
International Equivalent / Comparable Grade
Country/Region | Equivalent / Comparable Grade | Specific Commercial Brands | Notes |
Europe (EN) | EN AC-44300 | Hydro EN AC-44300, Handtmann 44300 | Reference alloy for pressure-tight die castings. |
Germany (DIN) | GD-AlSi12(Fe) / 3.2581 | TRIMET AlSi12 | Common for leak-proof housings and industrial castings. |
USA (AA) | A413.0 | Kaiser A413, Belmont A413 | Excellent fluidity and strong casting performance. |
Japan (JIS) | AC4A | UACJ AC4A, Daiki AC4A | Used for thin-wall, pressure-resistant castings. |
China (GB/T) | YL112 / ZL112 | Chalco ZL112, Nanshan YL112 | Widespread in compressor housings and valve blocks. |
Design Purpose
EN AC-44300 was designed for high-pressure fluid-handling and sealing-related applications where porosity control, leak resistance, and dimensional stability are critical. Its optimized silicon level promotes exceptional fluidity, allowing precise filling of channels, sealing grooves, and thin-wall sections. The alloy’s low copper content enhances its corrosion resistance, making it ideal for use in compressor housings, valve components, pump bodies, and pressure-retaining enclosures. With its stable shrinkage profile and predictable thermal behavior, EN AC-44300 supports complex multi-slider die designs and integrates well with Neway’s advanced gating, overflow, and cooling strategies.
Chemical Composition
Element | Silicon (Si) | Magnesium (Mg) | Iron (Fe) | Manganese (Mn) | Copper (Cu) | Zinc (Zn) | Titanium (Ti) | Aluminum (Al) |
Composition (%) | 11.0–13.0 | ≤0.30 | ≤0.55 | ≤0.55 | ≤0.10 | ≤0.10 | ≤0.20 | Balance |
Physical Properties
Property | Density | Melting Range | Thermal Conductivity | Electrical Conductivity | Thermal Expansion |
Value | ~2.67 g/cm³ | ~555–630 °C | ~130–150 W/m·K | ~30–35% IACS | ~20–22 µm/m·°C |
Mechanical Properties
Property | Tensile Strength | Yield Strength | Elongation | Hardness | Fatigue Strength |
Value (as-cast) | ~200–240 MPa | ~110–130 MPa | ~1–3% | ~85–100 HB | ~70–95 MPa |
Key Material Characteristics
Excellent fluidity supporting complex channels and precision cavities.
Superior pressure tightness ideal for compressor, pump, and hydraulic components.
Low porosity when vacuum-assisted casting is applied.
High corrosion resistance due to very low copper content.
Stable shrinkage values producing highly repeatable dimensions.
Good machinability for sealing faces and mounting interfaces.
Thermal stability supports moderate temperature applications.
High casting consistency suited for industrial mass production.
Manufacturability And Post Process
High-Pressure Die Casting (HPDC): EN AC-44300 excels in HPDC due to its high silicon content, which improves fluidity and reduces hot tearing. Thin walls of 1.0–1.5 mm can be reliably filled when Neway’s controlled die temperature and gating strategies are applied.
Vacuum-assisted HPDC for leak-proof components: Critical for hydraulic blocks, compressor housings, and valves. Vacuum casting minimizes gas porosity, ensuring pressure-tight results.
Machining of precision surfaces: The alloy’s eutectic Si network creates uniform cutting behavior, ideal for CNC finishing of sealing grooves and flatness-critical faces using Neway’s post machining services.
Threading, drilling, and reaming: Produces stable threads for fluid connectors and mounting points with low tool wear.
Tumbling and burr removal: Components undergo tumbling to achieve safe edges and smooth external surfaces.
High-precision inspection: Fluid-handling parts are tested through leak-test benches, CMM dimensional checks, and Neway’s inspection equipment to ensure sealing capability.
Suitable Surface Treatment
Anodizing for enhanced corrosion protection: EN AC-44300’s low copper content allows good anodizing performance with consistent color and improved environmental resistance.
Powder coating for durable outdoor exposure: Powder coating provides excellent impact resistance, UV stability, and anti-corrosion properties.
Liquid painting for cosmetic surfaces: Painting is ideal for industrial housings requiring brand-specific colors or fine texture.
Conversion coatings for improved adhesion: Chromate or Cr-free treatments improve paint adhesion and conductivity for electronics housings.
Bead-blasting for uniform matte texture: Controlled sand-blasting creates a clean, uniform pre-coating surface.
Laser marking: Precise, permanent logos or codes can be applied with minimal heat impact.
Common Industries and Applications
Compressor and pump housings requiring leak-proof casting.
Hydraulic valve bodies and precision fluid blocks.
Industrial machinery components with sealing interfaces.
Lighting housings and heat-dissipating structures.
HVAC and pneumatic system parts.
General engineering components needing high corrosion resistance.
When to Choose This Material
When leak-proof performance is essential for fluid or gas systems.
When corrosion resistance outweighs extreme mechanical strength.
For thin-walled, complex geometries that require high fluidity.
When anodizing or decorative finishes are required.
For pressure-tight housings with precise machining requirements.
When consistent quality is needed in high-volume production.
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