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Stainless steel machining is a manufacturing method that entails shaping raw stainless steel
material into a desired final form.
This process employs CNC machines equipped with precision milling tools, ensuring accurate
and intricate cutting of stainless steel components.
This capability enables the creation of complex geometric shapes and customized parts.
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Stainless steel is highly resistant to corrosion and rust, making it suitable for situations
where a part may be exposed to the elements for a long period of time.
Stainless steel is also fairly malleable and ductile.
| Common Stainless Steel Materials |
| No. | Properties |
| Stainless steel 304/304L | Stainless steel 304L (CNC) has excellent mechanical properties and good machinability. Resistant to most environments and corrosive media. |
| Stainless steel 316/316L | Stainless steel 316L (CNC) has similar mechanical properties to 304, with higher corrosion and chemical resistance. Ideal for marine applications. |
| Stainless steel 303 | Stainless steel 303 (CNC) has excellent toughness, but lower corrosion resistance than 304. Ideal for high volumes, due to its excellent machinability. |
| Stainless Steel 17-4 PH | Stainless steel 17-4 (CNC) - SAE grade 630 - is a precipitation hardening alloy with good corrosion resistance. Can be hardened up to 44 HRC. |
| Stainless steel 416 | Stainless steel 416 is magnetic and has a high machinability. |
| Stainless steel 2205 Duplex | Stainless steel 2205 Duplex (CNC) is the alloy with the highest strength and hardness. Suitable for applications in severe environments up to 300°C. |
| Stainless steel 420 | Stainless steel 420 provides high strength and corrosion resistance. It is the hardest of all stainless steels when hardened. |
| Stainless steel 440C | Stainless steel 440C has improved toughness and corrosion resistance due to Carbon and Chromium content. |
| Stainless steel 430 | Stainless steel 430 is magnetic and corrosion resistant. |
| Stainless steel 301 | Stainless steel 301 is corrosion resistant similar to Stainless steel 304. |
| Stainless steel 15-5 | Stainless steel 15-5 has a higher toughness than 17-4, better corrosion resistance and transverse properties compared to other similar martensitic grades. |
Stainless Steel Finishing and Post-Processing
The finish of stainless steel can vary significantly depending on the surface roughness.
However, it is typically described as shinier compared to unfinished aluminum alloys,
and it tends to have a slightly darker and more silver color.
Stainless steel offers flexibility in achieving various surface finishes, including options such as
media blasting, sanding, hand-polishing, and powder coating.
These processes can be employed to achieve a wide range of surface finish textures and
appearances.
| Name | Can be Applied with |
| Electropolishing | — |
| Electroless nickel plating | Media Blasting, Tumbling |
| Media Blasting | All post processes except Electropolish and Powdercoat |
| Nickel Plating | Media Blasting, Tumbling |
| Passivation | Black Oxide, Electroless Nickel Plating, Zinc Plating, Tumbling, Media Blasting |
| Tumbling | All post processes except Electropolish and Powdercoat |
| Zinc Plating | Media Blasting, Tumbling, Passivation |
| Powder coating | — |
| Black oxide | Media Blasting, Tumbling, Passivation |
CNC Machining Applications
The following industries gain the most from CNC machining:
1. Medical 2. Electronics 3. Publishing
4. Transportation 5. Woodwork 6. Construction
7. Agriculture 8. Aerospace 9. Manufacturing
10. Automotive 11. Firearms 12. Metalwork
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FAQ's
1. How much does CNC stainless steel cost?
The cost of CNC machining stainless steel is contingent on factors such as part complexity, size,
the specific stainless steel variant utilized, machining requirements, and material expenses.
These variables influence the selection of machining equipment, production duration, and overall
project cost.
2. Properties of Stainless Steel
1. High strength
2. Self-protective
3. Excellent heat resistance
4. Excellent corrosion resistance
5. Excellent impact resistance
6. Typically doesn’t require surface finishing
3. Surface Finish for Stainless Steel
The finish of stainless steel can vary significantly depending on the surface roughness.
However, it is typically described as shinier compared to unfinished aluminum alloys, and it tends
to have a slightly darker and more silver color.
Stainless steel offers flexibility in achieving various surface finishes, including options such as
media blasting, sanding, hand-polishing, and powder coating.
These processes can be employed to achieve a wide range of surface finish textures and appearances.
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