Custom precision CNC machining stainless steel 316 parts in China
We manufacture high-precision, corrosion-resistant 316 stainless steel components tailored to your exact drawings and specifications. From complex prototypes to high-volume production runs, our CNC machining facilities deliver consistent dimensional accuracy and superior surface quality for the most demanding applications.
Your Trusted Partner for 316 Stainless Steel CNC Parts
Specializing in custom CNC machining stainless steel 316 parts in China, we combine advanced equipment, experienced engineering, and rigorous process control to deliver components that meet the highest industry expectations.
Stainless steel 316 is an austenitic chromium-nickel alloy containing molybdenum, which significantly enhances its resistance to pitting and crevice corrosion in chloride-rich and marine environments. This makes it the material of choice for components exposed to saltwater, chemical processing media, and demanding hygienic applications.
Our custom CNC machining stainless steel 316 parts in China are produced on modern 3-axis, 4-axis, and 5-axis machining centers equipped with high-speed spindles and precision tooling. We handle everything from simple turned pins and fasteners to complex multi-face milled housings, valve bodies, and intricately profiled components.
Every project begins with a thorough design for manufacturability (DFM) review, where our engineers analyze your CAD models for machining feasibility, optimal fixturing, tool access, and cost-reduction opportunities. This upfront analysis ensures that your parts are produced efficiently without compromising dimensional integrity or surface quality.
Prototype to Production
From single-piece prototypes to batch quantities of tens of thousands, with consistent quality across every run.
Full Material Traceability
Every raw material batch is documented with mill test reports and tracked through each production stage.
Advanced 5-Axis Capability
Complex geometries and undercut features machined in a single setup, reducing cumulative tolerance errors.
Competitive China Pricing
Cost-effective manufacturing without sacrificing precision, delivered through optimized processes and efficient workflow.
Key Properties of 316 Stainless Steel
Understanding the material characteristics helps us optimize machining parameters and deliver parts that perform reliably in their intended service environment.
Superior Corrosion Resistance
The addition of 2 to 3 percent molybdenum provides excellent resistance to pitting and crevice corrosion in chloride-containing environments, making 316 far more durable than 304 in marine and chemical exposure.
High-Temperature Strength
316 maintains good mechanical strength and oxidation resistance at elevated temperatures, suitable for heat exchanger components, furnace parts, and exhaust system elements operating under continuous heat.
Excellent Cryogenic Toughness
The fully austenitic microstructure retains ductility and impact strength at sub-zero temperatures, making 316 ideal for cryogenic storage, refrigeration systems, and low-temperature processing equipment.
Responsive Machinability
With proper tooling selection, coolant application, and optimized feeds and speeds, 316 machines cleanly to tight tolerances. Our process parameters are tuned to minimize work hardening and extend tool life.
Outstanding Weldability
316 can be joined by all conventional fusion and resistance welding methods using matching filler metals. Post-weld solution annealing is recommended for applications requiring maximum corrosion resistance.
Essentially Non-Magnetic
In the fully annealed condition, 316 exhibits an austenitic structure that is essentially non-magnetic. Cold working may induce slight magnetic response, which can be removed through solution heat treatment.
International Standards & Equivalent Commercial Grades
316 stainless steel is known by different designations across national and international standards. The table below lists the most commonly referenced equivalent grades to help you specify material correctly for your market.
| Standard / Region | Standard 316 Grade | Low-Carbon 316L Grade | Notes |
|---|---|---|---|
| ASTM / AISI (United States) | 316 | 316L | Most widely referenced in global engineering drawings |
| EN (European Union) | 1.4401 | 1.4404 | Werkstoff number system; also designated X5CrNiMo17-12-2 |
| JIS (Japan) | SUS316 | SUS316L | Japanese Industrial Standards, common in Asian supply chains |
| GB / T (China) | 06Cr17Ni12Mo2 | 022Cr17Ni12Mo2 | Current Chinese national standard designation (formerly 0Cr17Ni12Mo2) |
| UNS (Unified Numbering System) | S31600 | S31603 | Used in ASTM and ASME specifications alongside trade names |
| ISO (International) | 316 | 316L | ISO 15510 and ISO 9328 reference these designations |
316 — Typical Chemical Composition (wt. %)
- Carbon (C)≤ 0.08
- Manganese (Mn)≤ 2.00
- Silicon (Si)≤ 1.00
- Phosphorus (P)≤ 0.045
- Sulfur (S)≤ 0.030
- Chromium (Cr)16.00 – 18.50
- Nickel (Ni)10.00 – 14.00
- Molybdenum (Mo)2.00 – 3.00
- Iron (Fe)Balance
316L — Typical Chemical Composition (wt. %)
- Carbon (C)≤ 0.03
- Manganese (Mn)≤ 2.00
- Silicon (Si)≤ 1.00
- Phosphorus (P)≤ 0.045
- Sulfur (S)≤ 0.030
- Chromium (Cr)16.00 – 18.50
- Nickel (Ni)10.00 – 14.00
- Molybdenum (Mo)2.00 – 3.00
- Iron (Fe)Balance
CNC Machining Capabilities for 316 Stainless Steel
Our facility is equipped to handle the full range of machining operations required to produce custom CNC machining stainless steel 316 parts in China, from roughing to precision finishing.
CNC Milling
3-axis, 4-axis, and simultaneous 5-axis milling centers produce complex prismatic geometries, pockets, contours, and 3D surfaces with high repeatability across production batches.
CNC Turning
Single-spindle and multi-spindle CNC lathes with live tooling produce rotational parts such as shafts, sleeves, bushings, and threaded components with concentricity down to micron level.
Swiss-Type Machining
Swiss-style sliding headstock lathes deliver high-precision small-diameter parts with exceptional length-to-diameter ratios, ideal for medical components, connectors, and miniature fasteners.
Wire EDM
Electrical discharge machining creates intricate internal and external profiles, sharp corners, and fine features with no contact force, making it suitable for delicate or hardened 316 components.
Surface Grinding & Lapping
Precision surface grinding, cylindrical grinding, and lapping operations achieve fine surface finishes and tight flatness, parallelism, and roundness tolerances on critical sealing and mating surfaces.
Drilling, Tapping & Reaming
High-precision hole-making operations produce through-holes, blind holes, tapped threads, and reamed bores with accurate position tolerances and clean thread profiles assembled-ready.
Industries & Applications Served
The corrosion resistance and mechanical properties of 316 stainless steel make it indispensable across a wide range of industries. Our custom CNC machining stainless steel 316 parts in China serve the following key sectors.
Marine & Shipbuilding
Deck hardware, cleats, bollards, valve bodies, propeller shafts, fasteners, and structural fittings that withstand continuous saltwater immersion and spray without corrosion degradation.
Food & Beverage Processing
Conveyor components, pump housings, valve parts, mixing equipment, and hygienic fittings that meet clean-in-place requirements and resist corrosion from acidic and alkaline cleaning agents.
Pharmaceutical & Medical
Surgical instrument components, implantable device parts, laboratory equipment, and fluid handling components that require biocompatibility, sterilization resistance, and ultra-fine surface finishes.
Chemical Processing
Reactor components, heat exchanger parts, pump and valve bodies, piping fittings, and pressure vessel elements exposed to acids, alkalis, and chloride-laden process fluids at elevated temperatures.
Oil & Gas
Downhole tool components, subsea equipment parts, valve trim, flow control elements, and instrumentation housings designed for sour service and offshore environments with high chloride and H2S exposure.
Automotive & Transportation
Exhaust system components, sensor housings, fuel system parts, fasteners, and bracketry that require corrosion resistance, thermal stability, and consistent dimensional performance under vibration.
Representative 316 Stainless Steel Products
A selection of custom CNC machining stainless steel 316 parts in China that demonstrate our capability across casting, forging, and precision-machined component categories.
Casting 316 Stainless Steel
Boat Anchor
Spline Screw
Positioning Cylinder
Why Source 316 CNC Parts from Our Facility
We combine deep material knowledge, precision machining expertise, and disciplined process control to deliver custom CNC machining stainless steel 316 parts in China that consistently meet or exceed your specifications.
Full Material Traceability
Every raw material batch is accompanied by mill test reports and assigned a unique heat number that follows the material through cutting, machining, surface treatment, and final inspection. You can trace any finished part back to its original melt and chemical composition documentation.
Tight Tolerance Capability
Our machining centers, calibrated measurement equipment, and controlled inspection environment enable us to consistently hold tolerances down to ±0.005 mm on critical features. First-article inspection reports and in-process dimensional checks ensure every batch meets your drawing requirements.
Engineering & DFM Support
Our engineering team reviews every project for manufacturability before production begins. We identify potential machining challenges, recommend design modifications that reduce cost without affecting function, and optimize fixturing and tooling strategies for efficient, high-quality production.
Cost-Effective Manufacturing
Located in a major Chinese industrial manufacturing hub, we benefit from a mature supply chain, competitive material sourcing, and efficient labor resources. These advantages translate into competitive pricing for your custom CNC machining stainless steel 316 parts in China, without compromising on quality or delivery performance.
Our Manufacturing Workflow
A structured, six-stage production process ensures that every custom CNC machining stainless steel 316 part in China moves from your CAD file to a finished, inspected component with consistent quality and predictable lead times.
Design Review & DFM Analysis
Our engineers review your CAD models and drawings, analyze machining feasibility, identify critical tolerances, and provide design-for-manufacturability feedback to optimize producibility and cost.
Material Sourcing & Incoming Inspection
316 or 316L raw material is sourced from qualified mills with full mill test reports. Each batch undergoes incoming inspection for chemical composition verification and dimensional conformance before release to production.
CNC Machining
Parts are machined on optimized 3-axis, 4-axis, or 5-axis centers using toolpaths validated through offline simulation. In-process checks at key stages verify dimensional accuracy before the part proceeds to subsequent operations.
In-Process Quality Inspection
Dimensional inspection is performed at designated checkpoints using calibrated micrometers, CMM, and optical measurement equipment. Any non-conformance is addressed immediately with corrective action before production continues.
Surface Treatment & Finishing
Required surface treatments such as passivation, electropolishing, bead blasting, or mechanical polishing are applied to enhance corrosion resistance and achieve the specified surface roughness values.
Final Inspection & Packaging
A final comprehensive inspection verifies all dimensions, surface finish, and cosmetic quality. Approved parts are cleaned, protected with anti-corrosion packaging, and prepared for shipment with accompanying inspection documentation.
Tolerance & Surface Finish Capabilities
We maintain precise control over dimensional tolerances and surface roughness throughout the machining process, ensuring your custom CNC machining stainless steel 316 parts in China meet the most demanding functional requirements.
Dimensional Tolerance Capabilities
- General linear dimensions±0.02 mm
- Precision critical features±0.005 mm
- Hole diameter (reamed)H7 / H6
- Shaft diameter (ground)g6 / h6
- Position tolerance±0.01 mm
- Concentricity0.005 mm TIR
- Flatness (ground)0.003 mm / 100 mm
- Thread quality6H / 6g (ISO)
Surface Finish Options
- As-machined (milled / turned)Ra 1.6 – 3.2 μm
- Fine machinedRa 0.8 – 1.6 μm
- Precision groundRa 0.2 – 0.8 μm
- Lapped / polishedRa 0.05 – 0.2 μm
- ElectropolishedRa 0.1 – 0.4 μm
- Bead blasted (matte)Ra 1.6 – 3.2 μm
- Passivated (citric / nitric)Corrosion enhancement
- Mirror polishedRa ≤ 0.05 μm
Frequently Asked Questions
Common questions about ordering custom CNC machining stainless steel 316 parts in China, from file formats to production quantities and lead times.
What file formats do you accept for part drawings?
We accept STEP, IGES, STL, DWG, DXF, and native CAD files from SolidWorks, Inventor, Creo, and CATIA. PDF drawings with dimensional annotations and tolerance callouts are also accepted. Providing both a 3D model and a 2D drawing ensures the most accurate interpretation of your requirements.
What is the minimum order quantity?
There is no strict minimum order quantity. We regularly produce single-piece prototypes, small development batches of 5 to 50 pieces, and high-volume production runs of thousands of parts. Pricing is structured to reflect setup costs and production efficiency, with per-unit costs decreasing as order quantities increase.
Can you handle both 316 and 316L grades?
Yes, we machine both standard 316 and low-carbon 316L grades. 316L is preferred for welded assemblies and applications where intergranular corrosion resistance after welding is critical. We can source material in bar stock, plate, tube, and forging forms to suit your part geometry and production volume.
What is the typical production lead time?
Standard prototype lead times range from 7 to 15 working days depending on part complexity and required surface treatments. Production batch lead times typically range from 15 to 30 working days. Expedited production can be arranged for urgent projects, and we provide regular progress updates throughout the manufacturing cycle.
Precision 316 Stainless Steel Parts, Manufactured to Your Specification
From initial design review to final inspection and packaging, every stage of production is controlled to deliver custom CNC machining stainless steel 316 parts in China that meet your exact dimensional, surface, and performance requirements. Whether you need a single prototype or a production run of thousands, our facility is equipped and ready to manufacture your components with consistent precision and reliable quality.