Top 5 Materials for CNC Machining
Choosing the right material affects machining cost, strength, surface finish, lead time, and final product performance. Below are five commonly used materials for CNC machined metal parts.
Aluminum 6061
Aluminum 6061 is one of the most common CNC machining materials. It offers good strength, lightweight performance, corrosion resistance, and excellent machinability.
- Good for housings, brackets, plates, and custom machined parts
- Easy to anodize for appearance and corrosion protection
- Suitable for prototypes and production parts
Aluminum 7075
Aluminum 7075 is stronger than 6061 and is often used when higher mechanical strength is required. It is common in structural parts, fixtures, aerospace-related hardware, and high-load components.
- Higher strength than 6061 aluminum
- Good for precision structural components
- Often used where weight and strength both matter
Stainless Steel 304
Stainless Steel 304 is widely used for CNC machined parts that require corrosion resistance, durability, and clean surface appearance.
- Common for industrial hardware, shafts, sleeves, and fasteners
- Good corrosion resistance for general environments
- Suitable for polished or brushed finishes
Stainless Steel 316
Stainless Steel 316 offers stronger corrosion resistance than 304, especially in harsher environments. It is often selected for parts exposed to moisture, chemicals, or outdoor conditions.
- Better corrosion resistance than 304
- Suitable for marine, medical, and chemical-related applications
- Good for custom precision hardware and threaded parts
Brass
Brass is easy to machine and has good electrical conductivity, corrosion resistance, and appearance. It is commonly used for inserts, connectors, bushings, fittings, and precision turned parts.
- Excellent machinability
- Good for threaded inserts, fittings, and conductive components
- Suitable for turning and small precision parts
Conclusion
For lightweight CNC parts, aluminum 6061 and 7075 are common choices. For stronger corrosion resistance, stainless steel 304 and 316 are often preferred. For conductive or precision turned parts, brass is a practical option.
If you are not sure which material is suitable, send your drawing, quantity, surface treatment, and application requirements. Our team can help review the best option for your project.