Ligas de alumínio para fundição para componentes de alto desempenho, oferecendo resistência excepcional, fluidez e resistência à corrosão.

I supply aluminum casting alloy in the grades and formats U.S. foundries actually run every day—optimized for die casting, sand casting, gravity casting, and permanent mold.

Core Aluminum Casting Alloy Families

I focus on four main aluminum alloy casting families, each tuned for specific processes and requirements:

• Al-Si casting alloys
  • Excellent fluidity and castability
  • Ideal for thin-wall, complex casting aluminum alloy parts
  • Widely used in high-pressure die casting and permanent mold
• Al-Si-Cu die casting alloys
  • Balanced strength, castability, and pressure tightness
  • Core grades: A380, A383, ADC12
  • Workhorse alloys for die cast aluminum grades in automotive and electronics
• Al-Si-Mg casting material
  • Heat-treatable cast aluminum alloy (T4, T5, T6)
  • Higher strength and ductility for structural components
  • Key alloys: 356, A356 for sand and gravity casting aluminum
• Al-Cu and Al-Mg casting alloys
  • Higher strength and elevated-temperature performance
  • Used where mechanical performance is prioritized over maximum corrosion resistance

Fit With Major Casting Processes

I match aluminum casting material to your process to reduce scrap and simplify production:

• High-pressure die casting aluminum alloy
  • A380, A383, ADC12 and similar Al-Si-Cu grades for thin-wall, high-volume parts
• Sand casting aluminum alloy
  • 356, A356, Al-Si-Mg and select Al-Cu grades for complex, lower-volume or large castings
• Gravity and permanent mold aluminum alloy
  • A356, 356 and Al-Si alloys with good fluidity and controlled shrinkage
• Low-pressure casting aluminum
  • Clean, low-gas alloys for wheels, structural components, and pressure-tight castings

Industries Using Cast Aluminum Alloy

My aluminum cast alloy portfolio serves:

• Automotivo – engine blocks, transmission cases, EV housings, wheels, brackets
• Aeroespacial – structural castings, housings, fittings in A356 and high-strength grades
• Industrial machinery – pumps, valves, compressor bodies, gear housings
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Typical ranges (depending on alloy and heat treatment):

• UTS (tensile strength): ~150–320 MPa
• Yield strength: ~80–250 MPa
• Elongation: ~1–12%
• Hardness: ~60–100 HB
  You can tune the balance of strength vs. ductility with alloy choice and temper (as-cast, T5, T6, etc.).

Resistência à Corrosão

• Cast aluminum alloy provides good to excellent corrosion resistance in automotive underbody, marine spray environments, and many chemical atmospheres.
• Proper alloy selection and finishing (coatings, anodizing, conversion coatings) deliver long-term corrosion-resistant cast aluminum performance for U.S. road salt conditions and coastal use.

Thermal and Electrical Conductivity

• Alto condutividade térmica makes aluminum casting material ideal for heat sinks, power electronics housings, motor controllers, and LED fixtures.
• Moderate electrical conductivity supports grounding, shielding, and certain power components where weight and cost beat copper.

Machinability, Finishing and Weldability

• Most aluminum cast alloys machine cleanly with predictable tool life, especially in T5/T6 tempers.
• Compatível com powder coating, painting, anodizing, plating, and CNC finishing for visible and cosmetic parts.
• Many alloys are weldable or at least repair-weldable, with Al-Si-Mg grades like A356 responding especially well when procedures are controlled.

Recyclability and Cost Efficiency

• Aluminum alloy casting is highly recyclable—we can use a high percentage of secondary aluminum casting alloy without sacrificing performance.
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cURL Too many subrequests. maximum strength and high-temperature stability matter more than corrosion resistance.

• Higher tensile and yield strength than standard Al-Si systems.
• Used in performance and aerospace-style components, brackets, and high-load housings.
• Typically require tight process control and careful heat treatment to hit spec.

These are not “commodity” alloys; they make sense when design loads and safety factors justify the upgrade.

Primary vs. Secondary Aluminum Casting Feedstock

For casting aluminum alloy, both primary e secondary metal are options:

• Primary aluminum casting ingot: low impurity content, tighter chemistry, ideal for high-spec automotive and aerospace work.
• Secondary aluminum casting alloy: made from recycled scrap, very cost-effective, excellent for general industrial and automotive applications where ultra-low impurities aren’t mandatory.

We routinely match feedstock type to your quality and cost targets so you’re not paying for purity you don’t actually need.

How Si, Mg, Cu, and Fe Affect Performance

The main elements in aluminum casting material directly drive performance:

• Silicon (Si):
  • Improves fluidity and castability
  • Reduces shrinkage and hot cracking
  • Higher Si = better thin-wall fill, slightly lower ductility
• Magnesium (Mg):
  • Enables heat treatment and age hardening
  • Boosts strength and fatigue resistance
  • Too much Mg can increase porosity if gas control is poor
• Copper (Cu):
  • Raises strength and hardness, especially at elevated temperatures
  • Slightly reduces corrosion resistance and weldability
• Iron (Fe):
  • Helps control sticking in die casting
  • Excess Fe forms brittle intermetallics, cutting ductility and impact toughness
  • Needs tight control, especially for high-pressure die casting alloy grades

By adjusting these elements within standard ranges or via custom melt specs, I can tune a cast aluminum alloy to fit your casting process, wall thickness, and performance targets.

Common Aluminum Casting Alloy Grades

Overview of Popular Cast Aluminum Alloy Designations

In the U.S. market, most aluminum casting alloys follow AA (Aluminum Association), EN (Europe), or JIS (Japan) designations. For die casting and sand casting shops, the core workhorses are A380, A383, ADC12, A360, 356, A356, and 413. I focus our supply on these because they cover 90%+ of real-world needs: high-pressure die casting, sand and gravity casting, and pressure-tight hydraulic and structural parts.

A380 Aluminum Casting Alloy for Die Casting

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• T6: Solution treated and artificially aged – maximum strength, widely used in structural and aerospace-grade castings

Your choice of temper directly affects final tensile strength, yield strength, and elongation, so we always match temper to your drawing and end-use.

413 and Al-Si12 Alloys for Hydraulic and Pressure Components

413 (Al-Si12) is a high-silicon casting alloy with:

• Excellent fluidity for intricate molds
• High pressure tightness, ideal for hydraulic bodies, pump and valve housings, and precision fluid components
• Good dimensional stability under internal pressure

If your parts must be leak-free under pressure, 413 is usually on the shortlist.

AA, EN, and JIS Cross-Reference

Many U.S. customers work with global tooling and drawings that call out EN or JIS grades. We routinely cross-reference:

• A380 ↔ EN AC-46000 ↔ JIS ADC10 (approximate)
• A383 ↔ EN AC-46100 ↔ JIS ADC12 (close functional equivalent)
• A356/356 ↔ EN AC-42100 / AC-42200
• 413 ↔ EN AC-44000 family

If you’re also sourcing precision castings or mixing processes like stainless steel casting alongside aluminum, our team can align alloy standards and tolerances across both, similar to how we standardize materials in our serviços de fundição de precisão.

Share your print callouts (AA, EN, or JIS), and we’ll lock in the correct casting aluminum alloy grade and specification for your foundry or machining line.

Chemical Composition of Aluminum Casting Alloys

The chemistry behind an aluminum casting alloy drives castability, strength, and defect control. When we supply casting aluminum alloy ingots or molten metal, we keep composition tight so your die casting, sand casting, or permanent mold runs stay stable and predictable.

Typical Composition Ranges (wt%)

These are typical ranges for common cast aluminum alloy grades used in U.S. foundries:

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Strength, ductility and hardness

Typical ranges you can expect (room temperature, representative values):

• As-cast (no heat treat)
  • A380 / ADC12 / A383 (HPDC):
    • UTS: 220–320 MPa
    • YS: 140–200 MPa
    • Elongation: 1–3%
    • Hardness: 75–95 HB
  • 413 (Al-Si12, pressure-tight parts):
    • UTS: 200–280 MPa, elongation 2–4%, hardness 70–85 HB
• Heat-treated (mainly A356 / 356 gravity or sand cast)
  • A356/356-T4:
    • UTS: 210–260 MPa
    • YS: 120–170 MPa
    • Elongation: 6–12%
  • A356/356-T6:
    • UTS: 260–320+ MPa
    • YS: 180–230 MPa
    • Elongation: 3–8%
    • Hardness: 80–100 HB

Utilize as-cast die cast grades (A380/ADC12) when you need thin walls and high productivity; use A356/356-T6 when structural strength and fatigue performance come first.

Fatigue, impact and density

• Fatigue strength (rotating bending, fully reversed):
  • A380/ADC12: typically 70–90 MPa
  • A356-T6: typically 90–120 MPa
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In short:

• Pick A380/ADC12 if you need thin-wall, high-pressure die casting with good strength and tight tolerances.
• Pick A356/356-T6 if you need higher ductility, better fatigue strength, and higher thermal conductivity for structural or rotating parts.

If you’re also comparing against other lightweight metals, you may find our guia de comparação entre ferro fundido e aço useful to benchmark strength and density trade-offs when switching to aluminum casting alloys.

Heat treatment options for aluminum casting alloy

Common tempers: F, T4, T5, T6, T7

For aluminum casting alloy, I usually guide customers toward a specific temper based on how the part will be used:

• F (as-cast): No heat treatment. Lowest cost, good for non-structural or cosmetic parts.
• T4: Solution heat treated and naturally aged. Better ductility and machinability.
• T5: Cooled from casting and artificially aged. Faster throughput, moderate strength.
• T6: Solution heat treated + artificial aging. Go‑to choice for maximum strength in A356 and 356.
• T7: Solution heat treated + overaged. Lower strength than T6, but much better estabilidade térmica at high temperature.

T4 temper: ductility and machining

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Choosing the wrong temper can mean:

• Cracking during machining (too hard, too brittle)
• Parts that creep or soften in hot environments
• Over-engineering and unnecessary cost

Practical recommendations by alloy and application

Here’s how I usually match aluminum alloy casting temper to the job:

• A356 / 356 sand or gravity casting
  • Structural / wheels / aerospace: T6
  • Machined housings, brackets with some flexibility: T4
• A380 / A383 / ADC12 high-pressure die casting
  • General automotive and electronics housings: T5 or as-cast F (when strength is less critical)
• High-temperature or under-hood components
  • Utilize T7 on suitable Al-Si-Mg or Al-Si-Cu alloys

If you plan additional tratamento de superfície (coatings, painting, anodizing) after heat treatment, we can also coordinate tempers and finishing sequences to keep both appearance and performance consistent, similar to how we manage finishes on our other alloys through our dedicated serviços de tratamento de superfície.

Casting process compatibility for aluminum casting alloy

High-pressure die casting aluminum alloy

For high-pressure die casting aluminum alloy grades, I focus on:

• Al-Si-Cu alloys like A380, A383, ADC12 for thin walls and fast cycles
• Controle rigoroso de Fe, gas and inclusions to avoid soldering and porosity
• Ligas projetadas para high fluidity, good filling, and stable die life

These alloys are ideal when you need complex shapes, tight tolerances, and automotive-level productivity.

Sand casting aluminum alloy

For sand casting aluminum alloy in complex shapes and thicker sections, I usually recommend:

• 356, A356, 319, 413 for structural, pump, and valve bodies
• Alloys with good feeding characteristics and lower hot-tear tendency
• Chemistries that tolerate slower cooling and variable section thickness

If you’re sourcing valve bodies or similar components, our experience as a custom valve castings manufacturer translates directly into better alloy and gating choices.

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For U.S. automotive programs, aluminum casting alloy is now standard for:

• Engine blocks and cylinder heads (A356, 356, Al-Si-Cu die casting alloys)
• Transmission and gearbox housings
• EV motor housings, inverter cases and battery trays
• Wheels, suspension knuckles, brackets and crossmembers

You get major weight savings vs. iron and steel, high thermal conductivity for powertrain and EV cooling, plus solid crash performance when we use heat-treatable Al-Si-Mg grades.

Aerospace and structural cast aluminum alloy

Aerospace and defense OEMs in the U.S. rely heavily on A356 and high-strength Al-Si-Mg / Al-Cu casting alloys para:

• Suportes estruturais e carcaças
• Landing gear components
• Complex engine and APU castings

We focus on tight chemistry, low gas content, and controlled heat treatment to hit critical strength, fatigue, and damage-tolerance targets in these parts.

Industrial machinery and pump/valve bodies

For industrial equipment, cast aluminum alloy is ideal when you need:

• Corpos de bombas e válvulas
• Compressor housings, gearboxes and motor frames
• Automation and robotics housings

Compared to cast iron, you get lighter equipment, easier handling, and better machinability. Where you need high precision, we pair castings with usinagem CNC de precisão to deliver ready-to-assemble parts (precision CNC machining bronze services show the level of finish we target on metal components).

Electronics enclosures and heat sinks

Al-Si aluminum casting material is widely used for:

• Electronics enclosures and junction boxes
• Heat sinks and thermal management components
• 5G, telecom and power electronics housings

High thermal conductivity, good electrical shielding, and excellent castability let us make thin-wall, complex shapes that still meet IP sealing and EMC requirements.

Marine and chemical service cast aluminum

Corrosion-resistant cast aluminum alloy (Al-Si-Mg and Al-Mg types) works well for:

• Marine hardware, housings, rails and brackets
• Chemical processing housings and pump bodies
• Offshore and coastal equipment

With proper alloy choice, surface treatment, and sealing, you get a strong, lightweight, and corrosion-resistant alternative to stainless or coated steel.

Pressure-tight hydraulic aluminum casting alloy

For hydraulics and high-pressure systems, we use pressure-tight aluminum casting alloys like 413 and optimized Al-Si die casting grades for:

• Hydraulic valve bodies
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• Small-lot sampling for new aluminum casting alloy grades and modifiers
• Suporte para trial casts so you can dial in fill, feeding, and heat treatment before committing to full production

Quality, Standards & Certifications for Aluminum Casting Alloy

When you’re buying aluminum casting alloy in the U.S. market, paperwork isn’t just a formality—it’s your insurance policy. I run our aluminum alloy casting operation with a “zero guesswork” mindset on quality and standards.

Compliance with Casting Alloy Standards

We match our cast aluminum alloy chemistry and properties to the major global specs, so your drawings and RFQs translate cleanly:

• ASTM B26 / B85 for aluminum alloy casting and ingot
• EN 1706 for European casting aluminum alloy grades
• AA (Aluminum Association) designations for common alloys like A380, A356, 413
• Cross-checked against customer-specific specs when needed

Every heat is certified, and test results are tied directly to the supplied aluminum casting material.

Certified Foundry Quality Systems

Our foundry and melt shop run under strict quality systems:

• ISO 9001 for overall quality management
• IATF 16949 support for automotive aluminum casting alloy programs
• Documented process control, SPC, and corrective actions

For customers in demanding sectors like oil & gas or turbines, we follow similar rigor to what we apply in our procedimentos de testes e controlo de qualidade.

Spectrographic Analysis & Melt Control

We don’t ship guesswork metal. Each casting aluminum alloy melt is checked with:

• Spectrographic analysis for full chemistry (Si, Mg, Cu, Fe, Mn, Zn, Ti, modifiers)
• In-process adjustments to keep tight windows for high-pressure die casting alloy and other processes
• Slag and dross control to keep inclusions low

This keeps your castings more consistent, especially for thin-wall and pressure-tight parts.

Mechanical Testing & Verification

To prove performance, we back chemistry with mechanical data:

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cURL Too many subrequests. favor high-fluidity die cast aluminum grades (A380, ADC12, A383).
Secções espessas: use 356/A356 or 413 with controlled feeding and solidification.

Pressure Tightness vs. Ductility

Think about what fails first: leaks or cracks.

• For pressure-tight aluminum alloy (hydraulics, pumps, compressors):
  • Die casting: A380, A383, ADC12 with tight porosity control
  • Sand/permanent mold: 413, A356/356 (often T6)
• For ductility and impact resistance (suspension, structural):
  • A356/356 in T4 or T6
  • High-strength Al-Si-Mg or Al-Cu casting alloy in squeeze or low-pressure casting

If you need both pressure tightness and strength, lean toward A356/356 T6 with a low-porosity process (squeeze or low-pressure casting).

Balance Strength, Corrosion Resistance and Cost

In the U.S. market, most buyers want “just strong enough” at the lowest total cost, not maximum lab strength.

• Strength first:
  • A356/356 T6, Al-Cu casting alloys, squeeze cast Al-Si-Mg
• Corrosion resistance first (automotive, marine, outdoor):
  • A360, A356, 356 (especially Al-Si-Mg with low Cu)
• Cost first / high volume:
  • A380, ADC12, A383 (high-pressure die cast aluminum grades, often with secondary aluminum)

Always look at custo de vida útil: machining time, scrap rate, heat treat, finishing. Sometimes a slightly more expensive cast aluminum alloy saves money downstream, just like with higher-quality metals in other processes such as precision laser-cut sheet materials.

A380 vs. ADC12 vs. A383 (Die Casting)

For aluminum alloy casting in HPDC, these three show up in almost every RFQ:

• A380 aluminum casting alloy (North America standard):
  • Pros: Very good castability, good strength, good pressure tightness with process control
  • Use it for: General-purpose die castings, automotive housings, consumer products
• ADC12 casting alloy (JIS, common in imported tooling):
  • Pros: Similar to A383/A380, excellent fluidity, easy to fill thin walls, good machinability
  • Use it for: Thin-wall and complex die castings, especially when tooling is designed to JIS
• A383 die cast aluminum (A380 alternative):
  • Pros: Better fluidity than A380, good for intricate, thin-wall, pressure-tight parts
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8. Machining and finishing:
   • Critical machined surfaces and tolerances
   • Coatings/finishes (anodizing, powder coat, painting, plating)
9. Feedstock quality:
   • Primary vs. secondary aluminum casting alloy
   • Max Fe and impurity levels allowed
10. Standards and quality requirements:
    • ASTM / EN / JIS references
    • Required certifications, test reports, and sampling plan

If you share this checklist up front, most U.S. aluminum foundries can quickly tell you which aluminum casting material (A380, ADC12, A383, A356, 356, 413, or a custom aluminum cast alloy) is the best match for your part and your budget.

Technical resources and support for aluminum casting alloy

I back every aluminum casting alloy order with fast, practical technical support so your team can move from quote to production with fewer surprises.

Datasheets and MSDS

You get clear, ready-to-use documents for every alloy:

All files are formatted for quick use in US engineering and purchasing workflows (PDF / Excel).

Alloy cross‑reference tables (AA / EN / JIS)

I provide easy cross‑reference tools so you can match global specs:

Engineering support & process optimization

My team works directly with your foundry or machine shop to tune the aluminum alloy casting to your process:

• Design reviews for wall thickness, ribs, bosses, and draft angles
• Casting simulation feedback (fill, solidification, hot spots)
• Recommendations on alloy choice by process (high-pressure die casting, sand, gravity, low-pressure)

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