The most common question OEM buyers ask is simple: how much does aluminum die casting cost? The honest answer is that it depends — but not in a vague, unhelpful way. There are specific variables that drive cost, and once you understand them, you can predict pricing accurately and make better decisions before you finalize a design.
This article covers every major cost factor in aluminum die casting, with real numbers and practical guidance for sourcing teams.
What Drives Aluminum Die Casting Cost
Aluminum die casting cost splits into two categories: upfront and recurring.
Upfront cost is dominated by tooling — the steel mold that shapes every part. This is a one-time investment that gets amortized across your production run. Recurring cost is the per-part cost: material, machine time, labor, energy, and any secondary operations like machining or surface finishing.
The relationship between these two matters a great deal. A $60,000 mold spread across 300,000 parts adds $0.20 per part. The same mold spread across 5,000 parts adds $12.00 per part. This is why volume is the single biggest lever in die casting economics.
Tooling Cost: The Largest Upfront Number
Tooling is the mold (die) machined from hardened tool steel — typically H13 — that withstands hundreds of thousands of injection cycles under high pressure and heat. The cost varies significantly by part complexity:
| Mold Type | Typical Cost Range | Mold Life (shots) |
|---|---|---|
| Simple single-cavity, small part | $3,000 – $10,000 | 100,000 – 300,000+ |
| Medium complexity, standard size | $10,000 – $50,000 | 80,000 – 200,000 |
| Complex, multi-cavity or large | $50,000 – $150,000+ | 50,000 – 150,000 |
| Automotive structural, tight tolerance | $80,000 – $250,000+ | 50,000 – 120,000 |
What increases tooling cost most:
- Slides and lifters — moving mold components required to cast undercuts. Each slide adds significant cost and maintenance.
- Number of cavities — multi-cavity molds cost more to build but reduce per-part cost at volume.
- Surface finish requirements — textured or polished surfaces require additional mold finishing work.
- Part size — larger parts need larger machines and dies.
- Thin walls and tight tolerances — require more precise mold engineering and reduce mold life.
Tooling cost also includes ongoing maintenance. EDM (electrical discharge machining) repair, nitriding coatings, and insert replacements add up over the mold's life. Budget roughly 10–15% of initial tooling cost annually for maintenance on an actively running mold.
Per-Part Cost: What Actually Changes with Volume
Once the mold is built, per-part cost is driven by material, machine time, labor, and energy. Here is a realistic baseline for a mid-complexity aluminum die casting part (approximately 0.5 kg, A380 alloy, no secondary operations):
| Cost Component | Typical Range | Share of Part Cost |
|---|---|---|
| Material (aluminum alloy + loss) | $1.50 – $3.50 / part | 38 – 45% |
| Machine time (cycle cost per shot) | $0.50 – $2.00 / part | 15 – 25% |
| Labor and overhead | $0.30 – $1.50 / part | 10 – 20% |
| Energy | $0.10 – $0.40 / part | 5 – 8% |
| Tooling amortization | $0.20 – $8.00 / part | Varies by volume |
| Quality and inspection | $0.05 – $0.50 / part | 2 – 8% |
To put round numbers on it: a simple aluminum die casting part at high volume (50,000+ units/year) typically runs $1 – $5 per part before secondary operations. Complex automotive parts at lower volumes can reach $20 – $50 per part or more, once machining and finishing are included.
How Part Design Affects Cost More Than Anything Else
In our experience, most cost overruns in aluminum die casting programs trace back to design decisions made before the mold was quoted. There are several design choices that directly increase cost — and many are easy to avoid with early input from the casting supplier.
Wall Thickness
The recommended wall thickness for aluminum die casting is 2.0 – 3.0 mm for most alloys. Walls that are too thick create shrinkage porosity and extend cycle time (which increases machine cost per part). Walls that are too thin risk misruns and filling defects. Uniform wall thickness throughout the part is more important than hitting a specific number — abrupt transitions from thick to thin sections cause internal defects and increase scrap rate.
Draft Angles
Draft angles allow the part to eject cleanly from the mold. The standard is 1° to 2° on exterior walls, 2° to 3° on interior walls. Zero draft forces the part to drag against the mold on ejection, which accelerates die wear, shortens mold life, and increases maintenance costs. If vertical surfaces are required for assembly, they need to be created by secondary machining — which adds cost.
Undercuts
Any feature that cannot be released by simply opening the two mold halves is an undercut. Casting undercuts requires slides or lifters — moving mold components that add $5,000 – $20,000 to tooling cost per slide and slow down cycle time. Every undercut in a design should be questioned: can it be redesigned to avoid the slide, or machined in post-processing at lower cost?
Tolerances
Die casting holds ±0.10 mm to ±0.25 mm as-cast on most dimensions. Tighter tolerances require post-cast CNC machining, which adds cost. The most expensive designs are those that specify tight tolerances on features that don't actually need them. A DFM review at the design stage identifies which tolerances are functional requirements and which are engineer conservatism.
Secondary Operations: The Hidden Cost Driver
Secondary operations are the steps that happen after the part leaves the casting machine. In many programs, these cost more than the casting itself — Dynacast estimates secondary operations can represent up to 80% of total component cost in complex assemblies.
Common secondary operations and their cost impact:
- CNC machining — required for tight tolerances, threaded holes, sealing surfaces. Adds $0.50 – $10+ per part depending on complexity and machine time.
- Trimming and deburring — removing flash and gate material. Can be automated (low cost) or manual (higher cost and variability).
- Surface treatments — shot blasting, anodizing, powder coating, painting, plating. Each adds $0.50 – $5+ per part depending on the process.
- Pressure testing — for parts requiring airtightness (housings, valve bodies). Adds $0.10 – $0.50 per part for automated testing.
- Assembly and sub-assembly — inserting threaded inserts, press-fitting bearings, welding. Varies widely.
The most effective way to reduce secondary operation cost is at the design stage: integrating features into the casting that would otherwise require machining, and designing parting lines and gates that minimize flash in critical areas.
Aluminum Alloy Selection and Material Cost
The most common die casting alloys — A380, ADC12, A360 — are priced off the LME aluminum index, which as of early 2026 sits around $2,500 – $2,600 per metric ton for primary aluminum. Die casting alloy ingots carry a premium over the LME price, and material cost per kilogram of finished casting is typically 8–10% higher than raw ingot price due to melt loss, dross, and gate material.
| Alloy | Relative Cost | Key Properties | Common Applications |
|---|---|---|---|
| A380 / ADC12 | Baseline | Good castability, moderate strength | General industrial, electronics, automotive |
| A360 | +5 – 10% | Better corrosion resistance, pressure tightness | Pump housings, marine, outdoor |
| A383 | Baseline | Good for thin walls, complex geometry | Electronics enclosures, fine detail parts |
| A413 | +5% | Excellent pressure tightness | Hydraulic components, valve bodies |
Alloy selection affects more than just material cost. Some alloys have better fluidity (they fill thin sections more easily), which reduces defect rates and scrap. Others have better corrosion resistance or higher as-cast strength. Choosing the right alloy for your application — rather than defaulting to the cheapest — often reduces total program cost by lowering scrap rates and secondary operation requirements.
At Meituo, every incoming aluminum alloy ingot is verified by spectrometer before production to confirm composition. This is a baseline quality step that protects both mechanical properties and long-term consistency across production batches.
Die Casting vs. Other Processes: Cost Comparison
| Process | Tooling Cost | Per-Part Cost at Volume | Best Volume Range | Tolerance |
|---|---|---|---|---|
| Aluminum Die Casting | $5,000 – $150,000+ | $1 – $20+ | 5,000 – 1,000,000+ | ±0.10 – 0.25mm |
| Sand Casting | $500 – $7,500 | $20 – $100+ | 1 – 5,000 | ±0.5 – 1.5mm |
| Permanent Mold Casting | $5,000 – $30,000 | $10 – $40 | 1,000 – 50,000 | ±0.25 – 0.5mm |
| Investment Casting | $2,000 – $20,000 | $20 – $100+ | 100 – 10,000 | ±0.1 – 0.3mm |
| CNC Machining (from billet) | $0 – $500 | $10 – $200+ | 1 – 2,000 | ±0.01 – 0.05mm |
The break-even point between sand casting and die casting is typically 1,000 – 2,000 parts, depending on part size and complexity. Below that, sand casting's lower tooling cost wins. Above it, die casting's faster cycle time and better part quality pull ahead on total cost.
How to Get an Accurate Quote
A die casting quote is only as accurate as the information behind it. When requesting a quote, provide:
- 3D CAD file (STEP format preferred) — essential for accurate tooling and part cost estimation.
- Annual volume estimate — this is the single biggest input into tooling amortization and per-part pricing. Be realistic; over-stating volume leads to a quote that won't hold.
- Alloy specification — or at minimum, the key performance requirements (strength, corrosion resistance, pressure tightness).
- Secondary operation requirements — which surfaces need machining, what tolerances are functional vs. preferred, surface finish specifications.
- Quality requirements — inspection standards, whether X-ray or CT inspection is required, any PPAP requirements for automotive programs.
If you don't have a 3D file yet, an early-stage DFM discussion with the casting supplier is worth doing before finalizing the design. Changes made at the concept stage cost nothing. Changes after the mold is cut can cost $5,000 – $30,000 or more depending on what needs to be modified.
Meituo's team provides DFM review as part of the quoting process for aluminum die casting programs. We review wall thickness, draft angles, parting line placement, and secondary operation requirements — and flag any design features that will drive unnecessary cost before we quote. Send us your design and we'll provide a detailed quote and DFM report within 5 business days.
