CNC Machining Materials

CNC Machining Materials for Prototype and Production Parts

Material selection affects strength, weight, corrosion resistance, surface finishing, cost, and application performance. EASEMFG supports commonly used metals and engineering plastics for CNC machined prototypes, low-volume parts, and batch production.

Prototype PartsFor design validation, structural samples, and fit checks.

Functional PartsMatch material choice with strength, wear, heat, or corrosion needs.

Surface FinishFinishing depends on material, appearance, and application environment.

Drawing ReviewFinal material should be confirmed with drawings and application requirements.

Common CNC Machining Materials

Specific grades should be confirmed according to drawing requirements, application environment, and production quantity.

Aluminum

Aluminum CNC Machining

Aluminum is widely used for prototypes, housings, brackets, frames, heat dissipation structures, and lightweight mechanical components.

Common references: 6061, 7075, and project-specific aluminum grades.
Suitable for lightweight structures, machined enclosures, and functional prototypes.
Surface finishing may include anodizing, brushing, polishing, or sandblasting.

Stainless Steel

Stainless Steel CNC Machining

Stainless steel is used when parts require strength, corrosion resistance, durability, or stable mechanical performance.

Common references: 304, 316, 17-4PH, and project-specific grades.
Suitable for shafts, fittings, sleeves, connectors, fixtures, and industrial components.
Machining strategy should consider hardness, tool wear, surface condition, and tolerance.

Brass & Copper

Brass and Copper CNC Machining

Brass and copper are commonly used for conductive, thermal, connector, and precision hardware applications.

Common uses include electrical connectors, terminals, bushings, threaded parts, and fittings.
Copper selection should consider conductivity, thermal performance, surface condition, and machining behavior.
Brass is often selected for machinability, hardware parts, fittings, and functional metal components.

Engineering Plastics

Engineering Plastic CNC Machining

Engineering plastics are used for lightweight parts, insulation components, wear-resistant parts, functional prototypes, and non-metallic structures.

Common references: POM, nylon, ABS, PC, PMMA, PTFE, and project-specific plastics.
Suitable for spacers, covers, guides, fixtures, insulating parts, and prototype components.
Plastic machining should consider deformation, burr control, surface finish, and clamping method.

Material Selection Reference

Material selection should consider strength, weight, corrosion resistance, finishing method, tolerance, and application environment.

Material Group	Typical Applications	Selection Considerations	Common Finishing Options
Aluminum	Housings, brackets, frames, enclosures, prototype parts	Weight, machinability, strength, appearance, anodizing suitability	Anodizing, brushing, polishing, sandblasting, as-machined
Stainless Steel	Shafts, fittings, sleeves, fixtures, industrial components	Strength, corrosion resistance, hardness, tool wear, surface requirement	Passivation, polishing, brushing, bead blasting, as-machined
Brass & Copper	Connectors, terminals, bushings, fittings, conductive parts	Conductivity, thermal performance, machinability, surface protection	Polishing, plating, brushing, as-machined
Engineering Plastics	Insulation parts, guides, spacers, covers, fixtures	Deformation risk, wear behavior, insulation, temperature environment	As-machined, polishing for selected plastics, edge deburring

How to Choose a Material for CNC Machining

If the drawing does not specify a final material, the selection should be reviewed from function, machining risk, and finishing requirements.

Start from Function

Confirm whether the part needs strength, lightweight structure, corrosion resistance, conductivity, insulation, wear resistance, or appearance quality.

Review Machining Risk

Thin walls, deep pockets, tight tolerance, small holes, long shafts, and plastic deformation risks should be reviewed before production.

Confirm Finishing Needs

Surface treatment should match material type, application environment, cosmetic requirement, and assembly condition.

Need Help Choosing a CNC Machining Material?

Send your drawing, material requirement, quantity range, surface finishing needs, and application details. EASEMFG can review the project and suggest a practical material and machining approach.

Request a Quote