Stainless Steel CNC Machining Services for Custom Parts
Factory-direct stainless steel CNC machining for corrosion-resistant, durable and precision custom parts, including shafts, bushings, fittings, brackets, fixtures, medical-style components, food-grade parts and industrial equipment components. Upload your CAD files for material selection, DFM review, tolerance evaluation and finishing recommendations.
304, 316, 303 & 17-4 PH
Grade selection reviewed by corrosion, strength and machinability.
Milling, Turning & Swiss
Process selected by geometry, OD/ID, threads and part size.
Passivation & Electropolishing
Surface finishing reviewed by cleanliness and corrosion needs.
Threads, Holes & Fits
Thread gauges, OD/ID, flatness and mating surfaces inspected.
Prototype to Production
Samples, pilot runs and repeat stainless production support.
Which stainless steel grade should I choose? | Baosheng reviews corrosion resistance, strength, machinability, surface finish, magnetic requirements, cost and application environment to recommend suitable grades such as 304, 316, 303 or 17-4 PH. |
Can you machine 304 and 316 stainless steel? | Yes. We support CNC machining of 304 and 316 stainless steel parts for corrosion-resistant components, fixtures, shafts, fittings and device parts. |
Can you machine small stainless turned parts? | Yes. Stainless shafts, pins, sleeves, bushings, fittings and threaded components can be produced by CNC turning or Swiss-style machining review. |
Can you provide passivation or electropolishing? | Yes. Passivation, electropolishing, brushing, polishing and other surface finishing options can be reviewed based on corrosion, cleanliness and appearance requirements. |
Can you support tight tolerance stainless parts? | Yes. Critical dimensions, threads, holes, OD/ID, flatness, mating faces and datum surfaces can be inspected according to drawing requirements. |
Is stainless steel harder to machine than aluminum? | Yes. Stainless steel generally requires more careful tool selection, cutting strategy, heat control and burr control because of higher strength, tool wear and work-hardening behavior. |
Stainless Steel Capability
Stainless Steel CNC Machining Capability
Stainless steel machining capability depends on grade, hardness, part geometry, wall thickness, thread requirements, tolerance, surface finish and inspection method. Baosheng reviews CAD models and 2D drawings before machining to identify work-hardening risk, burr control, finishing impact and inspection requirements.
| Capability Area | Manufacturing Range | Best For |
|---|---|---|
| CNC Milled Stainless Steel Parts | Stainless brackets, plates, fixtures, housings, mounting components and precision blocks. | Medical-style fixtures, industrial brackets, device components and mounting plates. |
| CNC Turned Stainless Steel Parts | Shafts, pins, bushings, sleeves, spacers, fittings and threaded stainless components. | Round precision components, fluid fittings, connectors and assembly hardware. |
| Swiss-Style Stainless Machining | Small-diameter or slender stainless steel turned parts. | Precision pins, miniature shafts, connectors and small medical-style components. |
| Precision Stainless Steel Machining | Critical holes, threads, datum surfaces, mating faces, OD/ID and controlled fits. | Functional interfaces, precision assemblies, fixture parts and high-value components. |
| Stainless Prototype Machining | Functional stainless steel prototypes for corrosion, strength, fit and assembly review. | Engineering validation, material testing and pre-production samples. |
| Finishing & Inspection Support | Passivation, electropolishing, polishing, brushing and dimensional inspection. | Corrosion-resistant parts, clean surfaces, medical-style parts and customer-facing components. |
Material Fit
When to Choose Stainless Steel CNC Machining
Stainless steel CNC machining is often selected when a part requires corrosion resistance, mechanical strength, wear resistance, clean surfaces or long-term durability in demanding environments. It is commonly used for shafts, bushings, fittings, fixtures, medical-style components, food equipment parts, marine components, industrial hardware and precision assemblies.
Lightweight structural parts may be better suited for aluminum CNC machining. Large bent stainless panels may require stainless steel sheet metal fabrication. Highly conductive parts may be better suited for copper CNC machining or brass CNC machining.
Choose stainless steel when
You need corrosion resistance, durability, clean surfaces, threaded fittings or high-strength functional components.
Review grade carefully
304, 316, 303 and 17-4 PH solve different corrosion, strength and machinability problems.
Plan threads and burr control
Thread depth, small holes, internal passages and edge break should be defined before machining.
Define surface finish early
Passivation, electropolishing, brushing, polishing and roughness requirements affect process planning.
Grade Selection
Stainless Steel Grade Selection for CNC Machined Parts
The best stainless steel grade depends on corrosion environment, strength requirement, machinability, surface finish, magnetic behavior, cost and application. 304 is often used for general corrosion-resistant parts. 316 is preferred when better corrosion resistance is needed. 303 improves machinability for turned parts. 17-4 PH is used when higher strength or hardness is required.
| Stainless Steel Grade | Typical Use | Notes |
|---|---|---|
| 304 Stainless Steel | General corrosion-resistant parts, fixtures, brackets, housings and device components. | Widely used stainless steel with good corrosion resistance and broad application range. |
| 316 Stainless Steel | Marine, medical-style, chemical, food equipment and corrosion-critical parts. | Better corrosion resistance than 304, especially in harsher environments. |
| 303 Stainless Steel | Precision turned parts, fittings, shafts and components where machinability matters. | Easier to machine than 304/316, but corrosion resistance is usually lower. |
| 17-4 PH Stainless Steel | High-strength parts, structural components, shafts and tooling-style applications. | Used when strength and hardness are important; heat treatment condition should be reviewed. |
| 416 Stainless Steel | Machined shafts, screws and components requiring improved machinability. | Good machinability, but corrosion resistance is lower than 304/316. |
| 420 / 440 Stainless Steel | Wear-resistant or hardened components. | Used where hardness and wear resistance are important; machining and finishing need review. |
Process Selection
Stainless Steel CNC Machining Processes
Stainless steel projects often require careful process planning because stainless steel can be more difficult to machine than aluminum or brass. Tool wear, heat buildup, work hardening, burr formation and thread quality should be reviewed before production.
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Stainless Steel CNC Milling
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Stainless Steel CNC Turning
03
Swiss Machining for Stainless Steel Parts
04
Precision Stainless Steel Machining
Part Types
Custom Stainless Steel CNC Parts We Manufacture
Baosheng supports stainless steel machined parts where corrosion resistance, clean surfaces, thread quality, durability and dimensional control matter.
- Stainless steel shafts
- Stainless steel pins
- Stainless bushings
- Stainless sleeves
- Stainless spacers
- Threaded stainless fittings
- Fluid fittings
- Medical-style device components
- Stainless steel brackets
- Stainless fixture plates
- Stainless mounting blocks
- Stainless connector components
- Food equipment components
- Marine stainless components
- Industrial machine parts
- Precision stainless steel inserts
- Stainless steel manifolds
- Passivated stainless steel parts
- Electropolished stainless steel parts
- Low-volume stainless production parts
Finishing
Surface Finishing for Stainless Steel CNC Parts
Stainless steel surface finishing should be reviewed before machining because passivation, electropolishing, polishing, brushing and bead blasting can affect appearance, burrs, edges, surface roughness, corrosion resistance and inspection requirements. For medical-style, food equipment or customer-facing stainless parts, surface finish and cleaning requirements should be defined early.
As-Machined
Functional stainless steel parts where tool marks are acceptable.
Passivation
Improving corrosion resistance after machining.
Electropolishing
Smooth, clean and corrosion-resistant surfaces for selected stainless parts.
Brushing
Cosmetic linear finish for visible stainless parts.
Polishing
Appearance surfaces or lower roughness requirements.
Bead Blasting
Laser Marking
Deburring / Edge Break
Functional safety, assembly and clean handling.
Not sure which stainless grade or finish is best?
Upload CAD files and drawings. Our engineers will review corrosion environment, machinability, surface finish, passivation, electropolishing and inspection requirements before quoting.
Stainless Part Quality
Tolerance, Work Hardening, Threads and Stainless Steel Part Inspection
Stainless steel is strong and corrosion resistant, but it can be more challenging to machine than aluminum because of tool wear, heat buildup, work hardening and burr formation. Baosheng reviews part geometry, stainless grade, wall thickness, thread depth, tolerance requirements, surface finish and inspection methods before machining.
Grade Review
304, 316, 303, 17-4 PH or other stainless grade selected.
Work-Hardening Risk
Cutting strategy and heat control reviewed.
Thread / Hole Review
Thread depth, gauges, small holes and deep holes checked.
Burr Control
Internal passages, edges and holes defined for deburring.
Machining
Milling, turning, Swiss or 5-axis process selected.
Finishing Review
Passivation, electropolishing, brushing and polishing reviewed.
Inspection
OD/ID, threads, flatness, datums and roughness checked when required.
Cleaning & Packaging
Protect clean surfaces and finished stainless components.
Application Proof
Stainless Steel CNC Machining Case Studies
The cases below focus on stainless-specific project risks: corrosion resistance, thread quality, clean internal passages, passivation, datum surfaces, turning stability and high-strength grades.
| Project | Material / Process | Challenge | Inspection / Result |
|---|---|---|---|
| 316 Stainless Steel Fluid Fitting | 316 stainless steel · CNC turning + threading + passivation · 300 pcs | Part required corrosion resistance, controlled threads and clean internal fluid path. | Thread depth, bore finish, burr control and passivation reviewed; thread gauges, OD/ID, sealing surfaces and internal burr condition checked before shipment. |
| 304 Stainless Steel Assembly Fixture | 304 stainless steel · CNC milling + passivation · 75 pcs | Fixture required stable datum surfaces, hole pattern control and corrosion resistance. | Machining sequence planned around datum surfaces and functional holes; flatness, hole positions and mating surfaces checked by first article and batch sampling. |
| 303 Stainless Steel Precision Shaft | 303 stainless steel · CNC turning + deburring · 1,200 pcs | Shaft required consistent OD, length, chamfer quality and smooth assembly fit. | Machinable grade selected; OD/ID control, chamfering and sampling inspection reviewed; OD, length, chamfer and surface condition checked. |
| 17-4 PH Stainless Steel High-Strength Component | 17-4 PH stainless steel · CNC milling + deburring + inspection · 60 pcs | Component required higher strength, controlled mating surfaces and accurate mounting holes. | Material condition, machining sequence, datum surfaces and inspection requirements reviewed; datum surfaces, hole positions, flatness and mating faces checked before shipment. |
Scale-Up Path
From Stainless Steel Prototype Machining to Production Parts
Many stainless steel CNC projects begin with prototype machining, move into low-volume manufacturing and later transition into repeat production. Baosheng can help review stainless steel grade selection, tolerance strategy, thread requirements, surface finishing, inspection planning and packaging standards so validated stainless steel parts can scale more smoothly.
Stainless steel prototype machining
Validate corrosion, strength, fit, assembly and surface finish before production.
Low-volume stainless steel manufacturing
Move validated stainless parts into pilot runs and bridge production.
High-volume stainless steel CNC machining
Support repeat stainless production when process, inspection and finishing are stable.
Precision stainless steel machining
Review OD/ID, threads, datums, mating faces and dimensional reports.
Industries
Stainless Steel CNC Machining for Engineering Applications
Medical Devices
Medical stainless steel CNC parts, fixtures, device components and clean-surface components.
Robotics
Robotics stainless steel components, shafts, pins, sleeves, spacers and assembly hardware.
Industrial Equipment
Industrial stainless steel machined parts, bushings, fixture plates, mounting blocks and machine components.
Your questions answered
Stainless Steel CNC Machining FAQs
Is stainless steel good for CNC machining?
Yes. Stainless steel is suitable for CNC machined parts that require corrosion resistance, strength, wear resistance, clean surfaces or durability. The best machining strategy depends on grade, geometry, tolerance, thread and finish requirements.
What stainless steel grades can be CNC machined?
Common CNC machined stainless steel grades include 304, 316, 303, 17-4 PH, 416, 420 and 440 stainless steel. Grade selection depends on corrosion resistance, strength, machinability, surface finish and application environment.
What is the difference between 304 and 316 stainless steel?
304 stainless steel is widely used for general corrosion-resistant parts. 316 stainless steel offers better corrosion resistance in harsher environments and is often selected for marine, chemical, food equipment or medical-style applications.
Is 303 stainless steel easier to machine?
Yes. 303 stainless steel is generally easier to machine than 304 or 316, making it useful for turned parts, shafts, fittings and repeat machined components. However, corrosion resistance may be lower than 304 or 316.
Can stainless steel parts be passivated?
Yes. Passivation is commonly used after stainless steel machining to improve corrosion resistance by removing surface contaminants and supporting the protective oxide layer.
Can stainless steel parts be electropolished?
Yes. Electropolishing can be reviewed for selected stainless steel parts requiring smoother, cleaner or more corrosion-resistant surfaces.
Is stainless steel harder to machine than aluminum?
Yes. Stainless steel generally creates more tool wear and heat than aluminum and may work harden during machining. Cutting strategy, tool selection, burr control and inspection planning are important.
Can you machine tight tolerance stainless steel parts?
Yes. Tight tolerance stainless steel features can be reviewed based on geometry, grade, size, process, surface finish and inspection method. A 2D drawing is recommended for critical dimensions.
What files do you need for a stainless steel CNC machining quote?
We recommend 3D CAD files and 2D drawings with stainless steel grade, quantity, tolerance, thread, surface finish, passivation, electropolishing, surface roughness and inspection requirements.
Can you sign an NDA before reviewing stainless steel part drawings?
Yes. NDA can be arranged before reviewing confidential CAD files, drawings or product information.
Get a Quote for Stainless Steel CNC Machined Parts
Upload CAD files and drawings with stainless steel grade, quantity, tolerance, thread, surface finish, passivation, electropolishing, surface roughness and inspection requirements. Our engineers will review material selection, machinability, process planning, finishing impact and inspection requirements before quoting.
- NDA available before file review
- 304 / 316 / 303 / 17-4 PH grade review
- Thread, burr and work-hardening DFM review
- Passivation, electropolishing and roughness review
- Prototype to production support
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