🧱 How to Choose the Right Material for CNC Machining
Learn how to choose the best material for CNC machining. Compare aluminum, steel, brass, and plastic for your next manufacturing project.
5/10/20251 min read


When it comes to CNC machining, choosing the right material can make or break your project. Whether you’re building a precision part, prototype, or production run, your material choice impacts strength, cost, finish quality, and machinability.
In this guide, we’ll break down the most common materials used in CNC machining — and help you decide which is right for your application.
🥇 Most Common CNC Materials
🔹 Aluminum (6061, 7075)
Pros: Lightweight, corrosion-resistant, easy to machine
Cons: Lower strength than steel
Best For: Aerospace, automotive, electronics, enclosures
🔹 Stainless Steel (303, 304, 316)
Pros: Durable, rust-proof, strong
Cons: Slower machining speeds, higher cost
Best For: Medical devices, industrial parts, outdoor equipment
🔹 Mild Steel
Pros: Strong, affordable, easily weldable
Cons: Prone to corrosion without treatment
Best For: Structural parts, tools, brackets
🔹 Brass
Pros: Smooth finish, low friction, corrosion-resistant
Cons: Higher material cost
Best For: Valves, gears, decorative components
🔹 Plastics (Nylon, ABS, Delrin)
Pros: Lightweight, flexible, low cost
Cons: Lower strength, can deform under heat
Best For: Prototypes, housings, low-load parts
🧠 What Factors Should You Consider?
Strength Requirements: What forces will the part endure?
Machinability: Some materials take longer or wear tools faster
Finish Needs: Do you need a smooth, decorative, or textured finish?
Budget: Consider both raw material and machining time
Environment: Will the part be exposed to moisture, heat, or chemicals?
⚙️ How InterGemm Can Help
Not sure which material is right for your CNC part?
At InterGemm, we don’t just machine — we guide. Our AI-powered quoting system considers your geometry and application to recommend the best material based on your goals.
We offer machining for:
Aluminum (6061, 7075)
Stainless Steel (303, 304, 316)
Carbon Steel
Brass
Plastics like Nylon, Delrin, ABS
📩 Let’s Build It Right
Choosing the right material can save you time, money, and stress.
Let InterGemm guide you from design to delivery — with smart, fast, and reliable CNC machining.
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