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Trusted by Engineers and Purchasing Leaders at the World's Most Successful Companies
At LS Manufacturing, our customers' trust is earned through 15+ years of expertise, ensuring ±0.5% dimensional accuracy and quality across 12,000+ projects, as demonstrated by ISO 9001:2015 certification and 99.80% on-time delivery.
Investment casting (also known as lost-wax casting) is an advanced manufacturing process used to produce highly complex, near-net-shape metal parts with exceptional dimensional accuracy and superior surface finishes. This method enables the production of intricate geometries—including internal passages, thin walls, and fine details—that are challenging or impossible to achieve with conventional machining or other casting methods.
At LS Manufacturing, we specialize in precision investment casting services tailored for high-value industries such as aerospace, medical, defense, and energy. We address critical challenges like porosity, shrinkage, and inconsistent material integrity through simulation-driven process design, controlled solidification, and rigorous quality validation—ensuring every component delivers reliable performance under demanding conditions.
Leverage our digital manufacturing platform to streamline prototyping and production. Upload your 3D model to receive an instant quote and a detailed manufacturability analysis—empowering you with cast components that meet the highest standards of precision, quality, and repeatability.
At LS Manufacturing, we tailor our investment casting process to your specific requirements for precision, quality, and budget. Our advanced capabilities transform your designs into high-integrity metal parts, delivering exceptional results across industries.
Our premium silica sol process builds multi-layer ceramic shells for the highest precision and finest surface finishes. Ideal for critical aerospace and medical components with complex geometries and demanding tolerance requirements.
This efficient water glass process offers excellent cost-effectiveness with fewer shell layers, balancing good precision with high productivity. Widely used for general engineering, hardware, and automotive applications.
Our hybrid approach combines silica sol's superior surface finish with sodium silicate's structural strength, achieving optimal precision-to-value for demanding industrial components like turbochargers and valve bodies.
At LS Manufacturing, we engineer investment casting solutions that directly address your critical challenges: achieving complex geometries with precision, ensuring material integrity for demanding environments, and balancing superior quality with cost-effective production. Our certified processes and material expertise are designed to deliver components that meet stringent performance requirements.
| Casting Material | Melting Temperature (°C) | Tensile Strength (MPa) | Hardness (HB/HV) | Compatible Process | Typical Applications |
|---|---|---|---|---|---|
| Stainless Steel(304/316/316L) | 1520-1600 | ≥500 | 150-200 HB | Silica Sol / Composite Mold | Medical Instruments, Petroleum Valves, Precision Machinery |
| High-Temperature Alloy(Inconel 718 / GH4169) | 1400-1450 | ≥900 | 300-380 HV | Silica Sol | Aircraft Engines, Gas Turbines, Turbochargers |
| Titanium Alloy(TC4 / TA15) | 1650-1700 | ≥800 | 300-350 HV | Silica Sol | Aerospace Structures, Medical Implants |
| Carbon/Low-Alloy Steel(45# / 20Cr) | 1500-1550 | ≥400 | 120-180 HB | Sodium Silicate / Composite Mold | Hardware Tools, Construction Machinery, Auto Parts |
| Aluminum Alloy(A356 / A380 / 6061) | 700-750 | ≥250 | 70-100 HB | All Processes | Precision Auto Parts, Electronic Housings, Aerospace Lightweight Structures |
The investment casting process at LS Manufacturing is a meticulously controlled sequence engineered for reproducibility and quality. It transforms complex designs into high-integrity metal components, solving critical challenges in achieving tight tolerances, superior surface finishes, and reliable material properties for demanding applications across aerospace, medical, and industrial sectors.
CAD models are analyzed and optimized for manufacturability. High-precision aluminum injection molds are then machined, capable of producing wax patterns with accuracies within ±0.05mm, setting the foundation for the entire casting's dimensional fidelity.
Automated wax injection ensures consistent, high-quality patterns. These are then carefully assembled onto a central wax gating system (tree), optimizing metal flow for uniform filling and solidification in subsequent steps, which is crucial for part consistency.
The assembly undergoes a series of controlled dips in refractory ceramic slurries and stucco coatings. This builds a robust, multi-layered shell (6-10 layers for silica sol, 3-5 for sodium silicate) that will withstand the extreme heat of molten metal.
The shell is subjected to high-pressure steam or thermal flash to rapidly remove the wax, leaving a pristine, hollow cavity. The shell is then fired at high temperatures (800°C - 1200°C) to achieve final strength and prepare for pouring.
Certified alloys are melted in controlled atmosphere furnaces to precise temperatures and chemistry. The molten metal is then poured into the pre-heated ceramic shell, utilizing its thermal mass to ensure complete filling and controlled solidification for sound microstructure.
After controlled cooling, the spent ceramic shell is mechanically removed. The castings, now in a "tree" formation, are cut off from the main gating system using precision methods like bandsaws or abrasive cutting.
Components undergo shot blasting, grinding, and cutoff point removal. Specific alloys receive prescribed heat treatment (e.g., solution treating and aging) to achieve required mechanical properties. Precision CNC machining is applied to critical interfaces.
Every batch undergoes rigorous validation, including dimensional checks via CMM, surface inspection, and Non-Destructive Testing (NDT) such as X-ray or dye penetrant to ensure internal integrity and compliance with specification before release.
Upload your part files for a rapid, no-obligation quote and manufacturing analysis from our engineering team.
LS Manufacturing delivers complete casting solutions by integrating precision investment casting with expert post-casting CNC machining. We strategically determine which features to achieve during casting and which critical dimensions to machine afterward, ensuring your components meet the most demanding tolerances and functional requirements while optimizing cost-efficiency and lead time.
At LS Manufacturing, quality is engineered into every precision investment casting. Our AS9100 and ISO 9001 certified processes ensure component reliability for demanding aerospace, medical, and industrial applications through rigorous quality protocols.
Our metrology lab features optical emission spectrometers for material verification, CNC CMMs for dimensional accuracy, X-ray systems for internal integrity, and surface testers for finish validation—ensuring every casting meets specifications.
Each component undergoes material certification, mechanical testing (tensile, yield, hardness), and non-destructive examination including dye penetrant and leak testing to guarantee performance under operational conditions.
With over 95% first-article inspection acceptance rate, we provide full dimensional reports and guarantee zero-cost rework, ensuring your project maintains schedule and budget compliance.
Partnering with LS Manufacturing for investment casting means securing a commitment to exceptional metallurgical integrity, guaranteed on-time delivery, and dedicated engineering collaboration for your most critical custom components.
We ensure part-to-part consistency and dimensional accuracy. Our process integrates advanced gating design, controlled solidification, and rigorous in-process inspections to achieve exceptional first-pass yield, precise CT tolerances, and superior as-cast surface finishes for complex geometries.
We provide reliable lead times from prototype to production. Our optimized workflow, NADCAP-accredited processes, and proactive capacity planning enable us to meet stringent deadlines, ensuring your supply chain remains uninterrupted and your time-to-market is accelerated.
Our engineers provide expert Design for Manufacturing (DFM) analysis for investment casting, material selection guidance, cost optimization, and full value-chain support—turning your concepts into high-performance, cost-effective cast components ready for assembly.
APPLICATIONS
LS Manufacturing's precision investment casting solves complex engineering challenges by producing near-net-shape components with intricate geometries, superior material properties, and exceptional surface finishes. Our services deliver the reliability, durability, and design freedom required for mission-critical applications across advanced industries.
Craft precise sensor housings, actuator components, and lightweight structural frames with embedded channels. Achieve the dimensional accuracy, rigidity, and complex internal features required for next-generation automated systems.
Manufacture turbine blades, structural brackets, and engine housings that withstand extreme temperatures and stress. Investment casting enables complex internal cooling channels, high-strength-to-weight ratios, and material consistency for flight-critical safety and performance.
Develop lightweight, high-strength parts for electric vehicle powertrains, turbocharger housings, and advanced braking systems. Investment casting optimizes structural performance and thermal management, supporting efficiency and durability goals.
Create corrosion-resistant valves, pump housings, and turbine components for oil & gas, nuclear, and renewable energy systems. Our castings ensure long-term integrity in high-pressure, high-temperature, and corrosive environments, maximizing operational uptime.
Fabricate wear-resistant gears, complex hydraulic valve bodies, and robust machinery components. Our solutions extend service life in abrasive conditions, reduce maintenance intervals, and enhance equipment reliability under continuous heavy loads.
Produce biocompatible implants, surgical instrument prototypes, and dental restoration frameworks. Our process ensures zero porosity, excellent surface finish for reduced bacterial adhesion, and meets strict ISO 13485 standards for patient safety and regulatory compliance.
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Our investment casting process supports a wide range of engineering-grade alloys, including stainless steels (304, 316, 17-4PH), aluminum alloys (A356, A357), high-temperature superalloys (Inconel 718, 625), titanium alloys (Ti-6Al-4V), and copper-based alloys. This material versatility enables components for aerospace, medical, automotive, and industrial applications.
We consistently maintain dimensional tolerances to CT4-CT8 standards (±0.005-0.010 in/in) with surface finishes ranging from Ra 1.6-12.5 μm. Complex geometries with wall thicknesses as thin as 0.5mm can be achieved while maintaining structural integrity.
Standard lead times range from 7-15 days for prototyping to 15-25 days for production volumes. We offer expedited services for urgent projects while maintaining our quality standards throughout the accelerated timeline.
Investment casting provides unparalleled design freedom for complex geometries, internal passages, and organic shapes. The process delivers superior material properties, excellent surface finish, and significant cost savings by minimizing secondary machining operations for complex parts.
Yes, our flexible manufacturing system accommodates projects from single prototype pieces to production runs exceeding 10,000+ components, maintaining consistent quality and dimensional stability across all volumes.
While both methods suit complex geometries, investment casting typically offers superior mechanical properties, better surface finish, and greater cost-effectiveness at production volumes. It's ideal for components requiring high structural integrity and performance under demanding conditions.
Our quality system includes material certification, first-article inspection, dimensional verification via CMM, X-ray inspection for internal integrity, and mechanical testing. We maintain AS9100 and ISO 9001 certifications with full traceability throughout the manufacturing process.
Key cost drivers include part complexity, alloy selection, dimensional tolerance requirements, surface finish specifications, and annual volumes. Our engineering team provides DFM analysis to optimize designs for both performance and cost-effectiveness.
Our engineering team offers comprehensive DFM analysis during the quoting phase, identifying potential manufacturing challenges and recommending optimizations for wall thickness uniformity, draft angles, and gating system design to ensure optimal castability and cost efficiency.
We maintain full material traceability from melt to final component, providing certified material test reports with each shipment that include chemical composition, mechanical properties, and heat treatment records meeting industry standards including NADCAP and AS9100 requirements.
We accommodate projects of all scales - from single prototype pieces to high-volume production runs. For prototype quantities, we offer modified tooling solutions to minimize initial investment while maintaining quality standards.
Yes, we regularly work with clients to develop custom alloy compositions and implement specialized processes including vacuum melting, hot isostatic pressing, and unique heat treatment cycles to meet specific application requirements.
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