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Aluminum Investment Casting

Aluminum poured via lost-wax investment casting for buyers who need low weight, complex geometry, and corrosion resistance in a single near-net-shape part. ISO 9001 certified facilities. Confirm alloy availability with the Redstone team before submitting drawings.

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Trusted by Programs across Tier 1 suppliers, Fortune 500 OEMs & hardware startups
  • Honda
  • Libman
  • Mahindra
  • Meyer
  • MIT
  • Amazon
  • Bloom Energy
  • Circor
  • Halliburton
  • Honda
Aluminum Investment Casting capabilities

Technical Capabilities

Review core aluminum investment casting capabilities, materials, tolerances, inspection methods, and production requirements before requesting a quote.

Production envelope · Verified
As-cast per ISO 8062
01
CT5-CT7
Reduced secondary machining
02
Near-net-shape
Grades confirmed at RFQ
03
Aluminum alloys
Materials
Aluminum alloys, specific grades confirmed per project at RFQ
Process
Lost-wax investment casting (expendable-pattern ceramic shell)
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See Our Process Or same-day technical feasibility review

Production specifications

Tolerances
CT5 to CT7 per ISO 8062 as-cast. CNC secondary available for tighter features
Surface finish
As-cast, shot blast, anodize, or machined finish available depending on alloy and geometry
Certifications
ISO 9001
Standard lead time
4-8 weeks from approved tooling. Wax tooling: 3 to 5 weeks

Production Process

01 DFM Review
02 Tooling
03 Trial Pours
04 Production
Next step

Ready for technical review?

Share your part details, drawings, or CAD files. Redstone will review the requirements and confirm feasibility, tolerances, materials, lead time, and next steps.

  • Feasibility review based on your drawing or CAD file
  • Material, tolerance, and production requirements confirmed
  • Quote reviewed within 24 hours
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Final specifications are confirmed during the technical feasibility review.

Why Redstone

Quality, cost, and a clear fit

Redstone helps hardware teams move from released drawings to repeat production with documented quality, competitive unit costs, and engineering support from the U.S.

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  • ISO 9001 certified facilities
  • U.S.-based engineering support
  • Direct manufacturing partner
Quality

Certified process, dimensional inspection included

Aluminum investment castings run under ISO 9001 quality systems. Dimensional reports and material certifications ship with every order. First-article approval is required before production units are released.

  • ISO 9001 certified facilities, same quality process at prototype and production quantity
  • Dimensional inspection report and material certs ship with every order
  • First-article approval required before production units are released
  • Alloy and process confirmed at RFQ, no surprises at first article
Cost

Lightweight parts without the machining overhead

Investment casting delivers aluminum parts closer to net shape than any other casting method, reducing CNC time and material waste. For complex housings, brackets, and connectors, this makes aluminum investment casting the lower total-cost route vs machined billet.

  • Near-net-shape output reduces CNC time and material waste vs machined billet
  • CT5 to CT7 as-cast tolerances minimize secondary operations on most features
  • One importer of record, landed cost includes duties and freight, no surprises
  • Tooling ownership transfers to buyer, no retooling cost at production scale
Fit

When weight matters as much as strength

Aluminum investment casting targets applications where steel or stainless is heavier than needed. The lost-wax process preserves the geometric complexity that die casting handles poorly at low-to-mid volumes, with tooling costs that scale to your production run.

  • Aluminum's strength-to-weight ratio with investment casting's geometric tolerance capability
  • Handles undercuts and internal features that die casting fills poorly at low-to-mid volume
  • Right fit when volumes are too low to amortize die casting tooling
  • Anodizing, chromate, and painted finishes available depending on alloy and application
Parts built for production

What we produce

Redstone supports production metal parts across automotive, electronics, industrial equipment, and consumer hardware programs.

Lightweight structural hardware

Lightweight structural hardware

Brackets, mounts, and connectors where weight reduction drives the design and steel is overspecified for the load.

Consumer and industrial housings

Consumer and industrial housings

Enclosures and covers with complex external geometry that die casting handles poorly at volumes below tooling break-even.

Aerospace-adjacent and UAV components

Aerospace-adjacent and UAV components

Parts requiring aluminum's strength-to-weight ratio with investment casting's geometric tolerance capability.

Medical and dental instrumentation

Medical and dental instrumentation

Instrument bodies and handles where sterilizability and low weight are co-requirements.

From quote to production

A five-step process, documented at every handoff

From initial drawings to final delivery, Redstone keeps each stage clear, documented, and aligned with production requirements.

Each handoff is documented. No stage moves forward until drawings, materials, and production requirements are confirmed with the customer.

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  1. 01

    Submit drawings and confirm alloy

    Share 2D prints or 3D CAD and specify your alloy requirement. The U.S. team confirms aluminum investment casting feasibility and reviews geometry for DFM before tooling is quoted.

  2. 02

    Quote and tooling approval

    Receive a landed-cost quote covering wax tooling, casting, finishing, inspection, and freight. Approve tooling design before production begins.

  3. 03

    Wax pattern and ceramic shell

    Wax patterns are injected and assembled into trees. Ceramic shell is built to the alloy-specific pour specification.

  4. 04

    Pour and knockout

    Molten aluminum is poured under controlled conditions. Shell is knocked out after solidification and parts are cleaned and separated.

  5. 05

    Finishing, inspection, and delivery

    Heat treat, anodize, or machine as specified. Dimensional report and material certs ship with parts. The U.S. team manages customs and delivers to dock.

Industries

Industries that source aluminum investment castings at Redstone

Redstone supports production aluminum investment casting programs for OEMs and engineering-led teams that require repeatable quality, controlled costs, and reliable part production.

  • Automotive

    Automotive

    Production components for automotive Tier 1 and Tier 2 suppliers and specialty OEM programs, run to IATF 16949 in certified facilities with U.S. engineering oversight from quote through delivery.

    • You run automotive components at production volume, not one-off prototypes.
    • Your program needs IATF 16949 quality and audit-ready documentation.
    • You are a Tier 1 or Tier 2 supplier, or a smaller OEM program that wants production-grade quality without a large-OEM minimum-order gate.
  • Industrial Machinery

    Industrial Machinery

    Cast, machined, and fabricated components for industrial equipment programs, run to ISO 9001 with U.S. engineering oversight from quote through delivery.

    • You run cast, machined, or fabricated components at production volume, not one-off prototypes.
    • Your equipment operates in demanding service environments.
    • You want to consolidate multiple processes with one supplier and one U.S. point of contact.
  • Medical and Dental

    Medical and Dental

    Precision-machined components for medical device and instrument programs, run to ISO 9001 in certified facilities with material traceability and U.S. engineering oversight from quote through delivery.

    • You run precision machined components at production volume, not one-off prototypes.
    • Your program needs material traceability and audit-ready quality documentation.
    • You produce components for medical devices, instruments, or equipment, working from released drawings.
  • Energy

    Energy

    Production aluminum investment casting components for energy programs, run to documented quality with U.S. engineering oversight.

    • Recurring production volume
    • Documented dimensional inspection
    • One U.S. point of contact
  • Consumer Hardware

    Consumer Hardware

    Production aluminum investment casting components for consumer hardware programs, run to documented quality with U.S. engineering oversight.

    • Recurring production volume
    • Documented dimensional inspection
    • One U.S. point of contact
  • Oil and Gas

    Oil and Gas

    Production aluminum investment casting components for oil and gas programs, run to documented quality with U.S. engineering oversight.

    • Recurring production volume
    • Documented dimensional inspection
    • One U.S. point of contact

Not sure if aluminum investment casting fits your part?

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Related capabilities

Related capabilities

Additional manufacturing processes that can support die casting programs, secondary operations, and production-ready metal parts.

Die Casting

Die Casting

Aluminum and zinc die casting for high-volume, dimensionally precise components.

View capability
CNC Machining

CNC Machining

3, 4, and 5-axis milling and turning from ISO 9001 and IATF 16949 certified facilities.

View capability
Sheet Metal Fabrication

Sheet Metal Fabrication

Laser cutting, bending, stamping, and welding for precision sheet metal components.

View capability
Sand Casting

Sand Casting

Aluminum, iron, steel, and brass castings from low-volume runs to large production batches.

View capability

Need help choosing the right process?

Share your part requirements and Redstone can help determine the right manufacturing path.

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Final step

Ready to review your part?

Share your drawings, CAD files, or production requirements. Redstone will review feasibility, materials, tolerances, lead time, and the best manufacturing path for your program.

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  • ISO 9001 and IATF 16949 certified facilities
  • U.S.-based engineering support
  • Quote reviewed within 24 hours
  • Production support across Redstone’s facilities in the U.S., Mexico, and China
Resources

From the engineering desk

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Frequently asked questions

Don’t see your question? Request a quote and our engineering team will answer it.

Does Redstone pour aluminum via investment casting?

Investment casting is most commonly applied to steel and stainless grades. Aluminum investment casting is available in the Redstone network, but it is not a standard catalog offering. Contact the U.S. team with your alloy and geometry requirements before submitting drawings so we can confirm facility fit and availability.

When does aluminum investment casting make sense vs aluminum die casting?

Die casting is the higher-volume, lower-per-part-cost option for aluminum once tooling is justified. Investment casting is the right choice when volumes are too low to amortize die casting tooling, when geometry has undercuts or internal features that die casting cannot fill cleanly, or when the alloy requirement is outside die casting's standard range.

What tolerances can aluminum investment casting hold?

CT5 to CT7 per ISO 8062 as-cast is the baseline. Features requiring tighter tolerances can be machined to plus or minus 0.002 in or better in secondary operations quoted alongside the casting.

What is the minimum order quantity?

500 units or $50,000 per order, whichever is greater.

Can surface treatments like anodizing be included?

Yes. Anodizing, chromate conversion, and painted finishes are available depending on alloy and application. Specify the finish requirement in your RFQ and it will be quoted as part of the landed cost.