In manufacturing, Brass 260 and Brass 360 are among the most commonly used copper‐zinc alloys. Although each alloy performs well, they differ greatly in machinability, composition and common uses. When engineers, manufacturers or purchasing teams understand these differences then choice of right alloy for a project becomes much easier. With that goal, in this blog post we will explain the basics.
What Is Brass 260
Brass 260—often called Cartridge Brass—is known for its versatility in forming operations. Its composition is about 70 % copper & 30 % zinc. Thanks to that mix, the material has great formability and ductility; therefore shaping and bending it is easy.
What Is Brass 360
Containing 61.5 % copper, 35.5 % zinc and 3 % lead, Brass 360 belongs to the free machining family. Because of this mix, this alloy achieves a standard machinability score of 100. It is the top choice for precise machining jobs worldwide.
Top 10 Differences between Brass 260 and 360
After knowing the basics we will now look at the main differences. This will simplify your alloy choice.
1. Chemical Composition
| Alloy | Copper (%) | Zinc (%) | Lead (%) | Iron (%) |
|---|---|---|---|---|
| Brass 360 | 61.5 | 35.5 | 3 | 0.35 max |
| Brass 260 | 68.5-71.5 | 28.5-31.5 | 0.07 max | 0.05 max |
2. Machinability
Brass 360 leads the scale with a machinability rating of 100. This makes it best for screw machines and parts that need tight tolerances. Brass 260, by comparison, has a rating around 30. Therefore bending or forming is is more suitable for it than heavy cutting.
3. Strength and Mechanical Properties
360 alloy usually reaches about 400 MPa in tensile strength because it has more zinc. Its Rockwell B hardness normally sits between 55 & 80. However the alloy’s strength goes down at very high temperatures.
Brass 260, on the other hand, hits about 345 MPa so it lags behind Brass 360 in tensile strength. Yet it performs better in ductility and elongation. On the Rockwell B scale, values of 40–70 are common. This means the alloy stays soft and is very easy to shape.
4. Workability and Formability
Sharp bends can make Brass 360 crack because its formability is limited; machining therefore is a better option for it. Brass 260 is at the other end of the range; it can easily handle tight bends and deep draws without cracking. This makes it a natural fit for drawing, stamping as well as for shaping complicated parts.
5. Environmental and Health Considerations
Lead in Brass 360 raises both health and environmental worries. Since lead can leach out, rules restrict its use in drinking water or food contact parts.
In contrast, Brass 260 is nearly lead free therefore it provides a safer, greener option for many applications, including those that touch people. The alloy’s makeup meets today’s health and environmental rules. Thus manufacturers prefer it for plumbing parts and consumer items.
Richconn often advises clients in regulated fields to pick Brass 260; because RoHS compliance and safe contact standards count just as much as performance.
6. Corrosion Resistance
The alloy holds up well against corrosion, in particular when operating conditions are fairly mild. Even so the higher zinc content makes it more prone to dezincification.
On the other hand, Brass 260 has more copper therefore it resists corrosion better than Brass 360. This material stands up to weathering and seldom experiences dezincification.
7. Residual Stress and Cracking (Season Cracking)
Because it contains less copper, Brass 360 is more likely to suffer stress corrosion cracking under ammonia and residual stress. Moreover machined components that remain highly stressed face an even higher risk of season cracking.
In contrast, Brass 260 resists such cracking in most service conditions because of higher copper percentage. Engineers therefore choose it for formed parts that will face outdoor exposure.
8. Color and Aesthetic Tone
Brass 360 shows a warm golden tone with a slight pink tint. This gives parts a shiny, rich look; therefore designers often choose it for visible or decorative pieces.
Brass 260, on the other hand, shows a bright yellow‐gold shade that looks a lot like real gold. That lively color pairs well with jewelry, cartridge cases as well as many hardware finishes.
9. Cost Comparison
Greater zinc content usually makes Brass 360 more expensive per pound at the purchasing stage. But fast machining often offsets that extra cost by cutting cycle times and reducing tool wear. In high volume runs, the overall price of finished parts can drop as a result.
In contrast, Brass 260 seems cheaper at first, yet limited machinability drives up processing costs. Longer cycle times and heavier tool wear often erode its material cost advantage. If a lot of cutting is required, the total project budget can rise noticeably.
For that reason choosing the right alloy and strategy matters; at RICHCONN our engineers weigh machining time, material price and finishing to keep expenses low.
10. Typical Applications
High machinability makes Brass 360 well suited for large scale production of precise components. Manufacturers mostly choose it for fittings, nozzles, valves and various plumbing or electrical hardware. Pinions, gears as well as similar mechanical parts also benefit from the alloy’s easy machining.
When parts must be bent or deep drawn, Brass 260’s extraordinary formability proves very useful. As a result the alloy is used in decorative hardware, ammunition casings and musical instruments such as trombones and trumpets. Plus its corrosion resistance helps to shape tanks and radiator cores.
Brass 360 vs 260 – Which One Is Best
No single alloy surpasses the other in every situation; the right choice depends on the particular needs of your application. Projects that involve large scale, high speed machining favor Brass 360 because it offers extraordinary machinability. As a result this alloy supports the production of complicated, exact components such as valves and fittings.
In contrast, jobs that need shaping, bending or forming point directly to Brass 260. Its extraordinary formability and ductility suit ammunition casings, decorative pieces and any part that must undergo cold working.
To Sum Up
Choosing either brass 260 or brass 360 is critical to project success. For machining work, brass 360 performs extremely well. In contrast brass 260 excels when bending or forming is required. Therefore selection of the right alloy maintains optimal performance & overall efficiency.
For expert advice about which brass is better for your work or precision CNC machining services, Richconn is a best option. You can contact us anytime.
Related Questions
No. Cold working is usually unsafe because the alloy’s high lead content greatly limits its cold workability.
Brass 260 shows greater springback and overall formability whereas 360 is not appropriate for most forming work.
Both C260 and C360 do not have dezincification resistance; achieving that property requires “inhibited” brasses containing arsenic or similar additives.
Yes. Lead present in C360 can leach into water or food therefore the alloy should not be used in food‐contact applications.
Brass 260 is a preferred option because its corrosion resistance excels in saltwater and other outdoor conditions.
