Materials | REKO | CNC Machining Service

CNC Machining Materials

We provide a wide range of certified materials, including metals and plastics, ensuring high precision, durability, and industry compliance for various applications.

Metal

Aluminum

Stainless steel

Steel

Brass

Copper

Plastic

POM (Delrin/Acetal)

PMMA (Acrylic)

PEEK

PA(Nylon)

PTFE(Teflon)

PVC

HDPE

ABS

Aluminum

Aluminum: Aluminum is known for its lightweight, strength, and machinability, making it an ideal choice for a wide range of applications, including aerospace, automotive, and industrial parts. Its excellent corrosion resistance also makes it perfect for outdoor projects and structural components.

Alloys: Aluminum 6061-T6, Aluminum 7075-T6, Aluminum 5052, Aluminum 5083,Aluminum 6060,Aluminum 6063,Aluminum 6082, Aluminum 2017

Available Finish: As machined, Anodizing, Powder coating, Electroplating, Painting, Sand blasting, Polishing

Learn more

Stainless steel

Stainless steel: Stainless steel is a widely used metal essential across various industries, including medical and power generation. Its value lies in its strength, heat resistance, and outstanding corrosion resistance.

Alloys: SUS201, SUS303, SUS 304/304L, SUS316/316L, SUS416, SUS420,SUS430,etc

Available Finish: As machined, Electroplating, Polishing,Passivation, Powder coating

Learn more

Steel

Steel:Steel, known for its outstanding mechanical properties and dimensional stability, is essential in modern engineering. Its high tensile strength allows for the creation of strong structural components vital for infrastructure, and advancements in metallurgy through alloying and heat treatment have broadened its use across various industries.

Alloys: Steel 1018,1020,1025,1045,1215, 4130, 4140, 4340, 5140

Available Finish: As machined, Electroplating, Polishing,Passivation, Powder coating

Learn more

Brass

Brass:Brass constitutes a broad family of copper-zinc alloys, with compositions varying primarily in zinc content and frequently incorporating alloying elements such as lead, aluminum, and iron. This material inherits high thermal and electrical conductivity from its copper base, while exhibiting exceptional wear resistance. Notably, the addition of lead significantly enhances its machinability - a property that establishes brass as the most workable copper alloy class.

Alloys: C360, C260

Available Finish: As machined, Polishing, Nickel Plating,Chrome plating, Bead Blasted, Gold Plating, Silver Plating

Learn more

Copper

Copper:Copper, also known as red copper or pure copper, is an alloy that is nearly entirely made up of copper, typically with over 99% copper content. Due to its near-purity, copper retains all the essential properties of the metal, making it one of the oldest and most widely used copper-based materials.

Alloys: C10100, C11000, C12200, C14500, C17200

Available Finish:As machined, Polishing, Nickel Plating,Chrome plating, Bead Blasted, Gold Plating, Silver Plating

Learn more

POM (Delrin/Acetal)

POM (Delrin/Acetal):Exhibits high stiffness, good moisture resistance, and superior wear resistance, featuring a low-friction surface. This makes it ideal for precision components such as gears and bearings, ensuring they fit perfectly and operate smoothly.

Color: POM Black, POM White,POM Blue, POM Red

Available Finish:As machined, Bead Blast

Learn more

PMMA (Acrylic)

PMMA (Acrylic):PMMA, commonly known as acrylic, is clear, weather-resistant, and does not fade. It is ideal for outdoor displays, signage, and lighting, due to its durability in various weather conditions.

Color: Transparency

Available Finish:As machined, Sand blasting, Tumbling, Painting

Learn more

PEEK

PEEK:PEEK is robust and maintains its strength at high temperatures. It is used in demanding sectors such as aerospace and medical implants due to its ability to withstand extreme conditions.

Color: Beige with no transparency

Available Finish:As machined, Bead Blast

Learn more

PA (Nylon)

PA (Nylon):Nylon is versatile, tough, and resistant to wear. Common applications include wear pads, guide wheels, and slide bearings.

Types: PA6,PA6+GF15,PA6+GF30,PA66,PA66+GF15,PA66+GF30

Available Finish:As machined, Bead Blast

Learn more

PTFE (Teflon)

PTFE (Teflon):PTFE, commonly known as Teflon, stands out among most engineering plastics due to its exceptionally high melting point., low friction, and chemical inertness. These properties make it essential in non-stick cookware and widely used in food, petrochemical, medical, and electrical industries.

Color: White,Black

Available Finish:As machined, Bead Blast

Learn more

PVC

PVC:Polyvinyl chloride (PVC) offers durability, affordability, and chemical resistance. Widely used in plumbing pipes, medical devices, and electrical cables, PVC effectively withstands corrosion and wear.

Color: Grey

Available Finish:As machined, Painting

Learn more

PE:Polyethylene is lightweight, durable, and highly impact-resistant. It is widely used for packaging, containers, and applications needing materials that can endure pressure without cracking.

Color: White,Black

Available Finish:As machined, Painting

Learn more

HDPE

HDPE:HDPE is strong, impact-resistant, and offers a high strength-to-density ratio. With excellent chemical and moisture resistance, it’s widely used in packaging,construction, electrical, and automotive industries.

Color: White,Black

Available Finish:As machined

Learn more

ABS

ABS:ABS offers excellent impact, heat, and chemical resistance, making it ideal for harsh environments. Its low cost and durability make it a popular choice, especially for CNC machining, which allows cost-effective production of custom parts.Commonly used in automotive parts, toys, electronic housings, and consumer goods.

Color: Natural,Black White,Grey

Available Finish:As machined, Bead Blast,Sand blasting,Painting, Powder coating, Electrophoresis

Learn more

Material Comparison Table

Material		Strength	Cost	Machinability	Typical Applications
	Aluminum	Medium	$$	Excellent	Aerospace, Automotive, Electronics
	Stainless Steel	High	$$$$	Moderate	Medical, Food Equipment, Marine
	Steel	High	$$$	Good	Machinery, Automotive, Structural Components
	Brass	Medium	$$$$	Excellent	Plumbing, Decorative Parts, Electrical
	Copper	Medium	$$$$	Fair	Electrical Components, Heat Sinks, Plumbing
	POM (Delrin)	Medium	$$$	Excellent	Gears, Bushings, Automotive
	PMMA (Acrylic)	Low	$$	Good	Light Covers, Displays, Medical
	PEEK	Very High	$$$$$	Moderate	Aerospace, Medical, High-Performance Devices
	PA (Nylon)	Medium	$$	Good	Bearings, Gears, Automotive
	PTFE (Teflon)	Low	$$$$	Poor	Chemical Industry, Seals, Insulators
	PVC	Medium-Low	$$	Good	Plumbing, Enclosures, Prototypes
	PE	Low	$	Good	Packaging, Lightweight Parts
	HDPE	Medium-Low	$$	Good	Containers, Food Industry, Outdoor Use
	ABS	Medium	$$	Good	Prototypes, Consumer Electronics, Toys

Material Selection Tips for CNC Machining

Selecting the right material for your CNC machined parts isn't just about strength or price—it's about finding the right balance between functionality, durability, finish options, and cost-effectiveness. Here are the key factors to consider:

1. Surface Finish Compatibility

Surface Finish	Recommended Materials	Not Suitable For
Anodizing	Aluminum	Plastics (e.g., POM, ABS)
Electroplating	Copper, Brass, Stainless Steel	POM, PTFE, PEEK
Painting	Aluminum, ABS	PTFE (low adhesion)
Polishing	Stainless Steel, PMMA, Brass	POM (low polishability)

2. Strength and Hardness

Requirement	Recommended Materials	Notes
High strength	Steel, Stainless Steel, PEEK	Ideal for structural or load-bearing parts
Moderate strength & easy machining	Aluminum, Brass, POM	Good for general-purpose parts
Low load, non-structural	ABS, PE, PTFE	Lightweight and cost-effective

3. Weight and Density

Material	Density (g/cm³)	Use Case
Aluminum	2.7	Lightweight components
Stainless Steel	7.8	Sturdy, corrosion-resistant
ABS	1.05	Enclosures, covers
PEEK	1.3	High-performance + low weight

4. Special Properties

Performance Requirement	Suitable Materials
High-temperature resistance (>150°C)	PEEK, PTFE, PA
Corrosion/Chemical resistance	Stainless Steel, PTFE, PEEK
Transparency	PMMA, PC
Medical/Food grade	PEEK, PTFE, 316L Stainless Steel

Material FAQs for CNC Machining

What materials are best for CNC machining?

Metals like aluminum, stainless steel, and brass are widely used due to their strength and machinability. For plastics, POM, ABS, and PEEK are common choices depending on the application.

What are the most cost-effective materials for prototypes?

Aluminum and ABS are commonly used for cost-effective prototyping due to their ease of machining and affordable price.

Can I provide my own materials for machining?

Yes, we can work with customer-supplied materials as long as they meet processing and safety standards. Please contact us to confirm compatibility.

Do you offer food-safe or medical-grade materials?

Yes, we offer materials like PEEK and 316L stainless steel that meet food and medical-grade requirements. Please specify your standards when ordering.

How do I choose the right material for my part?

Material selection depends on factors like strength, weight, temperature resistance, surface finish, and cost. We offer free DFM support to help you choose the best material.

Are plastic parts as strong as metal parts?

Not usually. Plastics like PEEK and POM have good mechanical strength, but metals are preferred for high-stress or load-bearing components.

Can all materials be anodized or plated?

No. For example, only certain metals like aluminum can be anodized. Plastics generally can't be anodized or electroplated.

Can I change the material after confirming the order?

We recommend finalizing the material choice before production. Changes after machining starts may incur additional costs or delays.

What if I'm not sure which material to use?

No problem. Share your part file and application, and we’ll recommend the most suitable materials based on your project’s needs.

Are recycled or eco-friendly materials available for CNC machining?

Yes, some materials such as recycled ABS, recycled PE, and certain aluminum alloys can be used for CNC machining. If you have sustainability requirements, let us know during your inquiry and we’ll recommend suitable options.

Do different materials affect machining lead time?

Yes. Harder or more difficult-to-machine materials may require longer lead times.

Wide Range of CNC Machining Materials

CNC Machining Materials

Material Comparison Table

Material Selection Tips for CNC Machining

Material FAQs for CNC Machining

Start production now and get your parts faster.