Materials

In CNC machining, material choice directly affects how a part performs and how much it costs to produce. Aluminum offers light weight, stainless steel provides strength, and plastics bring flexibility for complex shapes. To make selection easier, we’ve outlined the most widely used CNC machining materials along with their typical applications, so you can quickly see which option best fits your project needs.

Materials

Description
Aluminum Alloys

Aluminum Alloys

Lightweight and corrosion-resistant, aluminum is one of the most popular CNC machining materials.

 Advantages: Excellent machinability, good thermal conductivity, high strength-to-weight ratio.

 Limitations: Softer than steels, lower wear resistance.

 Applications: Electronic housings, heat sinks, automotive parts, aerospace components.

 Cost: Low to medium.

Stainless Steel

Stainless Steel

Known for its durability and corrosion resistance, stainless steel is ideal for functional and structural parts.

 Advantages: High strength, temperature resistance, hygienic surface.

 Limitations: Heavier and harder to machine, higher machining costs.

 Applications: Medical devices, food equipment, automotive components, precision enclosures.

 Cost: Medium to high.

Carbon Steel

Carbon Steel

A cost-effective option with strong mechanical properties, widely used for industrial parts.

 Advantages: High strength, easy heat treatment, affordable.

 Limitations: Poor corrosion resistance, requires surface finishing.

 Applications: Shafts, gears, tooling, machine components.

 Cost: Low.

Brass

Brass

An alloy of copper and zinc, brass offers excellent machinability and electrical conductivity.

 Advantages: Easy to cut, corrosion-resistant, attractive appearance, conductive.

 Limitations: Lower strength than steel, not suitable for heavy loads.

 Applications: Electrical connectors, precision fasteners, decorative hardware.

 Cost: Medium.

Copper

Copper

Renowned for superior electrical and thermal conductivity.

 Advantages: Excellent conductivity, good corrosion resistance.

 Limitations: High cost, surface oxidation, more difficult to machine.

 Applications: Electrical contacts, heat exchangers, electronic components.

 Cost: High.

Titanium Alloys

Titanium Alloys

Premium material with high strength and low weight, ideal for demanding industries.

 Advantages: Strong yet lightweight, biocompatible, outstanding corrosion resistance.

 Limitations: Difficult to machine, tool-wear intensive, expensive.

 Applications: Aerospace structures, medical implants, performance automotive parts.

 Cost: High.

Magnesium Alloys

Magnesium Alloys

The lightest structural metal, used where weight reduction is critical.

 Advantages: Very light, high specific strength, excellent machinability.

 Limitations: Lower corrosion resistance, flammability concerns, relatively costly.

 Applications: Consumer electronics, automotive lightweight parts, aerospace housings.

 Cost: Medium to high.

Tool Steel

Tool Steel

Designed for strength, hardness, and wear resistance, often used in tooling.

 Advantages: Very hard, heat-treatable, wear-resistant.

 Limitations: Expensive, more challenging to machine.

 Applications: Dies, molds, cutting tools, industrial fixtures.

 Cost: Medium to high.

Zinc Alloys

Zinc Alloys

Affordable and versatile, often used in die casting and decorative components.

 Advantages: Low cost, good machinability, smooth surface finish.

 Limitations: Lower strength, moderate corrosion resistance.

 Applications: Decorative hardware, small precision parts, electronic accessories.

 Cost: Low.

Engineering Plastics (ABS, Nylon, PEEK, etc.)

Engineering Plastics (ABS, Nylon, PEEK, etc.)

Lightweight and versatile, suitable for prototypes and functional parts.

 Advantages: Easy to machine, corrosion-resistant, insulating, flexible in design.

 Limitatons: Lower strength and heat resistance compared to metals.

 Applications: Medical housings, insulating components, automotive interiors, prototypes.

 Cost: Low to medium.

Not sure which material best fits your design?
Our engineers provide free consultation to help you choose the right material for your CNC project — balancing performance, cost, and manufacturing feasibility.

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