Stainless Steel Investment Casting Services for High-Precision CNC Machining Parts
What Is Stainless Steel Investment Casting?
Stainless steel investment casting is a precision metal-forming method that uses a wax pattern to build a ceramic mold. Once the wax is melted out—known as the lost-wax process—molten stainless steel is poured into the cavity to create the final part. This method delivers high accuracy, smooth surfaces, and the ability to produce complex geometries that traditional sand casting cannot easily achieve.
It is widely used for automotive parts, industrial machinery components, aerospace hardware, medical instruments, and marine fittings. The process is ideal for thin-wall structures and parts requiring stable mechanical properties. When tighter tolerances are needed, components can be further refined through CNC machining.
To explore the complete process, key advantages, and common applications, visit:
👉 What Is Stainless Steel Investment Casting Process Benefits and Uses
Why Choose Our Precision Investment Casting & CNC Machining
Our factory provides clear advantages that set us apart:
Tight CNC Machining Tolerances: ±0.01mm–0.02mm
Perfect for high-precision components used in engineering, robotics, and automotive applications.Superior Surface Finish: Ra 0.8–1.6 μm
Achieved through precision machining and optimized casting processes.Supports Both Large & Small Batch Production
Flexible capacity for prototypes, low-volume orders, and mass manufacturing.One-Stop Service: Mold Design → Casting → CNC Finishing → Inspection
Faster lead times, easier communication, and consistent quality control.Stable Delivery, Competitive Pricing, and Strong Export Experience
Ideal for global OEM/ODM customers seeking reliable long-term partnerships.
To understand why CNC machining maximizes the performance of investment cast parts, continue reading:
👉 Why Stainless Steel Investment Casting Works Best with CNC Machining
Our Stainless Steel Grades in Investment Casting (Material Options)
We offer a wide range of stainless steel grades to meet different performance, corrosion-resistance, and strength requirements. These materials are commonly used in investment casting and suitable for demanding industrial applications:
304L (CF-3) – General-purpose stainless steel with good corrosion resistance.
316L (CF-3M) – Enhanced corrosion resistance for marine, chemical, and medical applications.
17-4 PH (CB7Cu-1) – High strength and hardness with excellent fatigue performance.
410 (CA-15) – Martensitic stainless steel known for high strength and wear resistance.
430 (CB-30) – Ferritic stainless steel with good heat and corrosion resistance.
Duplex 2205 (CD3MN / 1.4462) – High strength and excellent chloride stress corrosion resistance.
Super Duplex 2507 (CE3MN) – Superior corrosion resistance for extreme environments.
904L (CN2MCuN) – High-alloy stainless steel for aggressive chemical environments.
Nitronic 60 (CG6MMN) – Exceptional wear, galling, and oxidation resistance.
To learn more about these materials and their casting applications, visit:
👉 Common Stainless Steel Grades Used in Investment Casting
Our Stainless Steel Investment Casting Process
Our stainless steel investment casting process follows a strict manufacturing SOP to ensure precision and consistency. Wax patterns are created and assembled into a tree, then coated repeatedly to form a durable ceramic shell. After dewaxing, molten stainless steel is poured into the mold cavity and allowed to cool. The shell is removed, and the castings are cleaned through shot blasting. Components requiring tighter tolerances are further refined through CNC machining. Every part undergoes final dimensional and surface inspection to ensure stable, high-quality results.
Learn more here:
👉 Full Step-by-Step Investment Casting Process Guide
CNC Machining for Investment Cast Parts (Our Manufacturing Strengths)
To achieve the tight tolerances and superior surface finishes required for critical applications, we provide full in-house CNC machining dedicated to investment cast components. Our facility is equipped with 30+ CNC machining centers and 30+ CNC lathes, allowing us to meet precision requirements ranging from basic features to complex 3D geometries.
With advanced 5-axis and 4-axis machining capabilities, we are able to process curved surfaces, thin-wall sections, deep cavities, and multi-angle features that cannot be achieved through casting alone. This ensures consistent dimensional accuracy, improved mechanical performance, and excellent repeatability across all stainless steel parts.
By integrating investment casting with high-precision CNC machining, we deliver tighter tolerances, smoother surfaces, and higher overall part performance for demanding industries.
Learn more here:
👉 How CNC Machining Improves Accuracy & Surface Finish for Cast Parts
Industries We Serve with Our Investment Casting & CNC Machining
Our stainless steel investment castings and CNC-machined components support industries that require high accuracy, durability, and reliable repeatability. We supply precision engine and structural parts for automotive applications, while marine projects rely on our corrosion-resistant stainless steel housings and valve bodies. Aerospace ground equipment, robotics systems, and industrial machinery benefit from stable, tight-tolerance parts with excellent dimensional consistency. We also produce stainless steel enclosures and structural components for electronics, and, when required, deliver medical-grade parts with strict process control and full material traceability.
👉 Industrial Applications of Stainless Steel Investment Casting + CNC Machining
Why Choose Us as Your Stainless Steel Investment Casting Supplier
We provide a streamlined one-stop solution combining stainless steel investment casting and in-house CNC machining, helping customers reduce sourcing complexity and shorten project timelines. With machining lead times of 7–15 days and strict QC throughout production, we ensure stable quality and full transparency. Our team delivers reliable international shipments—especially to the U.S.—and supports OEM/ODM projects for both simple and highly customized parts. Material certificates, PPAP documents, and CMM 3D inspection reports are available for complete quality assurance.
👉 Why Choose MS Machining for Precision Investment Casting and CNC