H59 vs H62: Selecting the Correct Brass Grade for CNC Machining

When discussing brass CNC machining, one must realize that not all brass is equal. Out of the various grades of brass, H59 and H62 are likely the two most prevalent brass alloys utilized in the industry for precision manufacturing.

Although they may seem similar to each other, the choosing between H59 vs H62 can have a large effect on the performance of your part, your machining processes, and the affordability of the part.

Here, we will outline the differences between your two choices for brass grades so that you can better understand what will work best for you on your next CNC project.

Overview: What Are H59 and H62 Brass?

Both are free-cutting brass and both belong to the CuZn series of brass alloys and both are readily available as rounds, plates, and bars for CNC turning and CNC milling.

Interested in learning more? Visit our Brass CNC Machining page for full capabilities.

Machinability Comparison

H59 Brass Machining

✔ Very good machinability

✔ Can be used for higher-speed turning and milling

✔ Chips run short and clean

✔ Is often selected for automatic lathe (Swiss type) production

H62 Brass Machining

✔ Harder than H59 to machine

✔ Will require sharper tools, may have more chip buildup

✔ Will have a better finish assuming the right tooling and lubrication is utilized

Verdict:

For ease of use and on higher-speed mass production, select H59 Brass Machining.

For parts that will consist of complex surfaces, or that it will be post-formed, select H62 Brass Machining.

Mechanical Properties

H59: Stronger but less ductile

H62: Softer, better suited for bending, deep drawing

Applications of H59 and H62 CNC Parts

H59 Brass Parts

H59 Brass is preferred based on its lower cost and excellent Machinability. Examples of H59 and applications of H59 include:

• Valve bodies

• Connectors & fittings

• Decorative hardware

• Threaded components

• Watch or small mechanical components

H62 Brass Parts

H62 Brass has a higher Copper content than H59. Examples of H62 applications include:

• Plumbing parts

• Marine equipment

• Electrical terminals

• Components that will be formed, bent or reshaped.

Surface Finish & Corrosion Resistance

H62 has better long-term oxidation and corrosion resistance due to higher copper content, making it more suitable for outdoor or fluid-exposed environments.

How to Choose the Right Brass for Your CNC Part

LJZ CNC Insights

At LJZ CNC Machining, we routinely assist clients with making choices between H59 and H62 with respect to the application of their part, expected performance and budget constraints.

Whether you are producing custom fittings, sensor terminals or medical connectors, we help refine the tooling, machining parameters like:

• Type of Tool and coating

• Feed rate and spindle speed

• Lubrication program

• Post-machining surface treatments

In short, we are not just a machining shop but your material collaborator.

Need Help with Brass CNC Machining?

If you are uncertain in identifying which grade of brass to use for your design, our engineers would be very happy help you. We are also able to provide custom CNC machining on both H59 and H62 brass with very tight tolerances, quick lead times and we can ship globally.

Learn more or get a quote on our Brass Machining Services page.