Remember that not every type of stainless steel is made equally. Certain types of stainless steel are more challenging to machine than others. It's crucial to speak with a CNC milling specialist to find out which kind of stainless steel is ideal for your particular application. The following types of stainless steel can be CNC milled:

l Austenitic stainless steels: The most popular kind of stainless steel is austenitic, which is renowned for its superior formability and resistance to corrosion. 304, 316, and 303 are a few common austenitic stainless steels that are capable of CNC milling.

l Martensitic stainless steels: High strength and hardness are well-known characteristics of martensitic stainless steels. Although they are not as resistant to corrosion as austenitic stainless steels, heat treatment can make them harder. 410, 420, and 440C are a few popular martensitic stainless steels that are capable of CNC milling.

l Ferritic stainless steels: Ferritic stainless steels are highly regarded for their excellent formability and low cost. They outperform martensitic stainless steels in terms of corrosion resistance, but they are not as resilient as austenitic stainless steels. 430 and 439 are two typical ferritic stainless steels that are capable of CNC milling.

l Duplex stainless steels: Austenitic and ferritic stainless steels are combined to create duplex stainless steels. Compared to other forms of stainless steel, they can be more challenging to machine, but they have good strength and corrosion resistance. Common duplex stainless steels 2205 and 2507 are among those that can be CNC milled.

l Precipitation-hardened stainless steels: One kind of martensitic stainless steel that can be hardened via precipitation hardening is precipitation-hardened stainless steel. Despite their extreme hardness and strength, they can be challenging to machine. Stainless steels that have been precipitation-hardened and are commonly CNC millable include 17-4 PH and 15-5 PH.

The exact specifications of the part will determine which kind of stainless steel is ideal for CNC milling. Austenitic stainless steel, for instance, would be an excellent option if the part needed to have exceptional corrosion resistance. Selecting martensitic or precipitation-hardened stainless steel is a wise option if the part requires a high degree of strength and hardness.