Sand blasting (even matting)
Used to remove knife marks and improve surface consistency to form a uniform matte texture; suitable for unifying cosmetic parts with the bottom surface before subsequent processing.
316 Stainless Steel
316 Stainless Steel (containing Mo) is significantly more corrosion-resistant than 304, especially more stable against chloride ions, salt spray, and certain chemical media, making it suitable for CNC parts in "humid/seaside/chemical environments + long-term use."
Quote checklist: Upload your 3D model and, when available, a 2D drawing. Identify the required process, material, quantity, critical dimensions, finish, appearance standard, and target delivery date.
Key Material and Manufacturing Parameters
Engineering note: Values below are typical reference ranges. Final manufacturability, tolerances, material condition, surface finish, cost, and lead time depend on the drawing, geometry, quantity, and selected process.
Upload CAD files and mark critical features for an engineering review before production.
| Process | CNC machining (stainless steel 316) |
|---|---|
| Material system | Austenitic stainless steel (stronger corrosion resistance, suitable for seaside/chemical media environments) |
| Machining tolerance | ±0.20 mm (common reference; critical dimensions are subject to 2D marking tolerances) |
| Minimum wall thickness | ≥ 1.0 mm (recommended value; thin-walled/long thin structures are recommended to be reviewed by DFM first) |
| Temperature resistance reference | About 400℃ (short-time/environmental reference; specific subject to working conditions and standards) |
| Tensile strength | 480–650 MPa (common range, may vary with status and standards) |
| Density | 7.9 g/cm³ |
| Holes and threads | It is recommended that assembly holes/positioning holes comply with 2D tolerances; for deep holes and small threads, please mark the hole depth, thread standard and quantity (affects the tool and processing rhythm) |
| Inside angles and tools | It is recommended to reserve a rounded corner R for the inner corners (to avoid tool interference); if a right-angled inner cavity is required, please make a note and accept the process restrictions. |
| Surface requirements | If you need to specify Ra, drawing direction/texture or mirror polishing level, please write it clearly in the remarks and provide a reference sample/reference picture |
| Finishing | Sand blasting, wire brushing, polishing, electrolytic polishing, passivation, laser engraving |
| Typical lead time | Relevant to size, quantity, clamping difficulty and surface finishing; clear delivery and expedited options will be given after uploading the file |
Finishing
Brushed (directional texture)
It is suitable for "metal texture" presentation on the appearance surface; it is recommended to clarify the drawing direction, appearance surface and texture thickness standards to ensure batch consistency.
Polish (increase gloss)
Used to improve surface gloss and touch; for parts with higher appearance requirements, it is recommended to clearly define the polishing area and accept slight corrugation/rounding changes.
Electrolytic polishing (appearance + corrosion resistance enhancement)
Improves corrosion resistance while improving smoothness, suitable for parts that are sensitive to cleanliness, appearance and corrosion resistance.
Passivation (corrosion resistance strengthening)
Parts suitable for use in humid/salt spray/chemical media environments; it is recommended to note the use medium and environment in order to choose a more matching treatment method and inspection criteria.
Laser engraving (permanent marking)
Suitable for serial numbers, logos, scales and traceability information; it is recommended to provide vector file/font requirements and position and size instructions to avoid key mating surfaces.
Why Choose Stainless Steel 316 (CNC Machining)
Stronger corrosion resistance (more stable in seaside/chemical environments)
It is more stable in salt spray, humid and chemical media environments, and is suitable for long-term use of structural parts, cosmetic parts and connectors.
Solid strength, suitable for terminal metal parts
Taking into account both strength and reliability, it is suitable for application scenarios and batch delivery that require "metal strength + long-term durability".
Controllable appearance and texture (brushing/polishing/electrolytic polishing)
Different texture combinations can be made according to the appearance surface to achieve visual and tactile goals from matte to high gloss, which facilitates "finished product" presentation.
Complete process chain (passivation + marking)
It supports passivation to strengthen corrosion resistance, and can be laser engraved to achieve permanent identification and traceability; it is more suitable for projects with quality management and consistency requirements.
Recommended Applications
- Corrosion resistance is preferred: Structural parts and connectors used in humid/salt spray/chemical media environments
- Long-term use terminal pieces: Requirements for reliability, stability and durability
- Appearance metallic texture: Appearance surfaces that require brushing/polishing/electrolytic polishing
- traceability identification: Laser engraving of serial number, logo, scale and other permanent markings is required.
Consider Another Material or Process
- Extreme lightweight is a priority: Can evaluate lighter material systems such as aluminum alloy/titanium alloy
- Extremely sensitive to cost and processing efficiency: Can evaluate stainless steel grades or other materials that are easier to cut
- Strong magnetism/special electromagnetic requirements: It is recommended to clarify the working conditions and standards before selecting materials.
- Ultra deep cavity/extremely thin long parts: The risk of processing and deformation is high. It is recommended to do DFM or adjust the structure first.
Design and DFM Guidelines
- Wall thickness and rigidity: Thin-walled and long-thin structures are more likely to be deformed during processing; it is recommended to keep the wall thickness uniform, reinforce key areas, and try to avoid sudden changes in thickness.
- Internal corner fillet R: Internal right angles will increase tool interference and processing costs; it is recommended to reserve a reasonable corner radius (which is also more conducive to fatigue and stress distribution).
- Hole depth and tool accessibility: Deep holes, fine holes and long cavities will significantly affect the processing strategy and stability; it is recommended to mark the hole depth, chamfering and key matching requirements, and process in two stages or modify the structure if necessary.
- Threads and mounting holes: Please clarify the thread standard, length and quantity; it is recommended to provide tolerances and inspection criterias for key assembly holes to avoid the risk of rework due to "mismatched assembly".
- Surface treatment and appearance: The drawing direction/polishing level/electrolytic polishing area should be clearly stated in the drawing or remarks; it is recommended that the appearance surface be separated from the clamping datum to reduce clamping marks and secondary repairs.