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CNC machining materials

Metals

Full material index
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Aluminum 2011

Easy to machine but has moderate weldability and strength, and low corrosion resistance. Anodizing is needed to protect it.

Aluminum 2024

Resists fatigue, is easy to machine, but is difficult to weld and requires surface treatments for use in corrosive environments.

Aluminum 5052

Uses magnesium as its main alloying element, offers excellent corrosion resistance due to the absence of copper, and cannot be heat-treated.

Aluminum 6061

Renowned for its strength, weldability, and versatile use, it offers excellent machinability and mechanical performance.

Aluminum 6063

Has a similar composition to 6061 but offers better formability, though it is not as strong.

Aluminum 7075

Offers greater strength than 7050 aluminum and outstanding fatigue resistance, making it ideal for repeated stress applications.

Brass C260

An alloy made of about 30% zinc, with very low amounts of lead and iron.

Brass C360

Also referred to as free-cutting brass, this alloy is highly machinable due to the relatively high amount of lead. 

Bronze 642

Offers high strength, resists corrosion, and is easy to machine.

Bronze 932

A durable alloy with good wear and corrosion resistance, but it cannot be heat-treated.

C101

An extremely pure metal that comes in at about 99.99% Cu, which gives it exceptional conductivity.

C110

A highly pure, affordable copper alloy, ideal for electrical uses and easier to machine than copper 101.

Inconel

A high-strength, corrosion-resistant nickel alloy designed for parts used in extreme environments.

Monel

A strong, corrosion-resistant nickel alloy that's suitable for high temperatures, welding, and is non-magnetic.

Stainless Steel 13-8

A steel with excellent strength, hardness, and corrosion-resistant properties. 

Stainless Steel 15-5

A precipitation-hardened metal with superior strength, toughness, and corrosion resistance, enhanced by low-temperature heat treatment.

Stainless Steel 17-4

This metal offers high tensile strength, exceptional hardness, and strong corrosion resistance—even at elevated temperatures.

Stainless Steel 303

A strong, easy to machine, and corrosion resistant metal, making it a versatile choice for many uses.

Stainless Steel 304

A budget-friendly option with strong corrosion resistance and increased strength, comparable to 18-8 grade.

Stainless Steel 316

A strong, corrosion-resistant, highly machinable metal that's also affordable. 

Stainless Steel 416

Easy to machine, but susceptible to rust. Delivered soft, can be heat-treated for greater hardness and strength.

Stainless Steel 440

The highest carbon content in its series, it offers exceptional hardness and strength with moderate corrosion resistance.

Steel 1018

1018 is magnetic, compatible with surface hardening methods, and can be easily machined, welded, and heat-treated.

Steel 1045

1045 carbon steel offers excellent strength, durability, and machinability, making it well-suited for manufacturing applications.

Steel 1215

This steel grade machines easily but is not suitable for welding and has lower strength.

Steel 4140

A tough, strong metal with high resistance to wear and impact. Its higher carbon content increases its strength and hardness.

Steel 4142

Excellent toughness, ductility, strength, and machinability in its annealed state, but shouldn't be machined after heat treatment.

Steel 4340

A durable, high-strength alloy designed to perform well under extreme impact, heat, and wear.

Steel 8620

A medium-strength, low-carbon alloy steel known for toughness, strength, enhanced case hardness, and durability.

Titanium

Corrosion resistance, biocompatibility, and strength-to-weight ratio make it ideal for engineering challenges.

Resources

Hardness Testing Method Cheat Sheet

Material Data Sheets

Machinist loads parts onto a CNC mill fixture

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