360 Brass (C36000): The Guide to Properties, Machining & Applications

What Are the Key Properties of 360 Brass?

The performance of 360 brass is defined by its precise chemistry and the mechanical properties that result from it. It is designed for machinability first, but it also offers a balanced set of other useful traits.

Chemical Composition

The elements in 360 brass are carefully controlled to optimize machining while maintaining good mechanical properties.

• Note on Lead: The lead content that makes 360 brass so easy to machine also means it may not meet RoHS compliance standards for electronics or food-contact applications in some regions. For these, low-lead alternatives like C37700 are used.

Mechanical and Physical Properties

These properties make 360 brass suitable for a wide range of functional and decorative applications.

• Corrosion Resistance: It has good corrosion resistance for indoor and mild outdoor environments. However, it is not recommended for saltwater or highly corrosive conditions.

How Does 360 Brass Perform in Machining?

The 100% machinability rating is the reason 360 brass is so popular. This rating is a benchmark, meaning it is the easiest metal to machine. Understanding how to leverage this is critical for optimizing production.

Machining Parameters and Tool Life

• High Speeds: 360 brass can be machined at speeds up to 3,000 surface feet per minute (SFM) on CNC lathes. This is significantly faster than 260 brass (2,500 SFM) or stainless steel 303 (1,500 SFM).
• Chip Breaking: The lead content ensures that chips break into small, manageable pieces. This prevents long, stringy chips from tangling around the tool or workpiece, allowing for uninterrupted automated production.
• Tool Life: Because the material is “free-cutting,” it causes very little tool wear. A machining shop study found that carbide tools lasted 3 times longer when cutting 360 brass compared to cutting 464 naval brass.
• Case Study: A fastener manufacturer in Texas produces 10,000 brass screws per hour using 360 brass on screw machines. By optimizing their cutting speed to 2,800 SFM and using the correct coolant, they reduced tool replacement costs by 40%.

Fabrication Tips

• Cutting Fluids: Use water-soluble coolants to reduce heat and further extend tool life. Avoid oil-based fluids, which can react with the lead and leave residues.
• Deburring: Machined parts may have small burrs. For critical applications like plumbing fittings, a quick vibratory tumbling step will remove these and ensure a smooth, leak-proof surface.
• Forming: Before machining, 360 brass is highly ductile. It can be cold-formed or bent into complex shapes. A lock manufacturer uses this property to form curved lock bodies before machining the precise keyway.

Where Is 360 Brass Used in the Real World?

360 brass is found in thousands of products across many industries. Its combination of machinability, strength, and appearance makes it a versatile choice.

Plumbing and Fluid Handling

This is one of the largest applications. The material’s machinability allows for the creation of complex internal channels for fluid control.

• Case Study: A leading plumbing manufacturer in Ohio switched from 260 brass to 360 brass for their pipe fittings. They reported a 25% increase in production efficiency due to faster cycle times and fewer tool changes. The finished fittings provided tight, leak-proof connections.
• Common products include valve bodies, hose barbs, and pipe fittings.

Hardware and Fasteners

The material is ideal for high-volume production of precision hardware.

• Screws, nuts, and bolts are commonly made from 360 brass. Its strength is sufficient for most fastening applications, and its corrosion resistance ensures a long life indoors.
• It is also used for gears, pinions, and locks. A major lock brand uses 360 brass for lock cylinders because it resists tampering and corrosion.

Electronics and Decorative Applications

• Electrical Connectors: 360 brass’s good thermal and electrical conductivity make it suitable for connectors and terminals.
• Decorative Trim: The material polishes to a bright, gold-like finish. It is used for furniture trim, lighting fixtures, and architectural hardware where appearance matters.

360 Brass vs. Other Common Alloys

Comparing 360 brass to other materials helps clarify its position as the machinability leader.

Key Takeaway: 360 brass is the undisputed leader for machinability. If your primary goal is to produce high volumes of precise parts quickly and cost-effectively, 360 brass is the best choice. If you need a part for a marine environment, you would accept the slower machining speeds and higher cost of 464 naval brass for its superior corrosion resistance.

360 brass (C36000) is a specialized alloy designed to solve the primary challenge of high-volume manufacturing: machining efficiency. Its 100% machinability rating, driven by a controlled lead content, allows for faster production speeds, longer tool life, and lower overall costs. While it has limitations—it is not suitable for welding and its corrosion resistance is not suited for marine environments—its balanced properties of strength, ductility, and machinability make it the standard material for plumbing components, precision fasteners, and a vast array of machined parts. For any project involving high-volume CNC or screw machine production, 360 brass is often the most practical and economical choice.

How to write a spec that gets priced correctly

A drawing is a contract. If it leaves a number open, the shop fills that number in with its own default. The default is rarely the one you had in mind. Put these five lines on every RFQ and most of the back-and-forth disappears before it starts.

• Alloy designation and the standard behind it
• Temper or heat treatment condition
• Mechanical properties you actually need
• Mill certificate and traceability requirement
• Finish and the faces it applies to

The point is not paperwork. Each line removes a decision the shop would otherwise make for you. A complete RFQ comes back priced. An incomplete one comes back guessed.

What actually drives the price

Buyers usually push on material because it is the line they can see. In practice the material is rarely the biggest number on a quote. These five lines decide most of it:

• alloy grade and mill availability
• stock size versus finished size
• heat treatment and testing
• machinability
• certification

Ask for the quote split by line. A supplier who cannot break it down is guessing, and you will pay for the guess. The line you can usually renegotiate is the tolerance band, not the raw material.

Problems you will meet, and the fix

Every process has a failure mode it prefers. The same four show up again and again on this kind of work, and none of them are mysteries once you know what to look for.

• Substituting a similar grade without telling anyone
• Hardness that varies across a single bar
• Corrosion in a weld heat-affected zone
• Distortion after heat treatment on a thin part

Catch the fault on the first part, not the hundredth. A first-article check costs an hour. A bad batch costs the whole order. Write the check into the purchase order so nobody has to remember it.

What to check on the first article

The first article is the cheapest inspection you will ever buy. Use it properly and the rest of the run becomes boring, which is exactly what you want.

• Every dimension on the drawing, with the measured value written beside it.
• The material certificate, matched to the heat or lot number on the parts.
• The finish against the sample you approved, under the same light.
• Fit against the mating part, assembled rather than measured.
• Packaging, because parts that arrive damaged were never in tolerance.

Check in this order: datums, then mating features, then cosmetic faces. If the datums are wrong, every number after them is noise. Keep the report on file. When a problem shows up in month six, that document is the only thing that tells you what changed.

How to compare two quotes fairly

Two numbers are not comparable unless the scope matches. Line them up before you decide, because a low number with three gaps is not a low number.

Same drawing, same material, same finish, same inspection. Anything else is a different job wearing the same part number. Then look at what each quote leaves out. Freight, packaging, certificates and tooling are the usual gaps.

Ask each supplier to state their assumptions in writing. The one who does is usually the one who has run the process before.

Scaling from one part to a batch

The first part teaches you the process. The hundredth teaches you the process cost.

Watch three things as volume grows: setup amortisation, tool wear, and how much hand work the finish still needs. If the unit price barely moves between ten and a hundred, the cost sits in material or in hand work, not in setup. Ask which, because only one of them is negotiable.

Lead time behaves the same way. A one-off is scheduled around other jobs. A repeat order is scheduled around your forecast. Give the shop a forecast and the lead time gets shorter, not longer.

How to read a supplier's quote

A quote is a short document with a long shadow. Four things in it decide whether the job runs smoothly, and only one of them is the price.

• The scope line. It should name the process, the material and the finish, not just the part.
• The tolerance basis. General tolerance or the drawing, and which standard it follows.
• The exclusions. Tooling, freight, certificates and inspection are the usual omissions.
• The validity date. Material prices move, and an open-ended quote is a promise nobody can keep.

Read the exclusions before you read the total. A quote that leaves out tooling is not cheaper. It is a quote for a different job.

What to send with the first order

The first order sets the pattern for every order after it. Send a complete package once and the shop files it, and the second order takes a fraction of the time.

• A STEP or native model plus a PDF drawing carrying the same revision letter.
• The material callout by standard number, not by trade name.
• The finish and the exact faces it applies to.
• Any test the part must pass: fit, seal, drop, salt spray, dielectric.
• A contact who can answer a question inside one working day.

Then write down what was agreed. An email that confirms the material, the finish and the date is worth more than a longer purchase order that leaves them open.

When this is the wrong choice

A good supplier tells you when the process does not fit. These are the cases where we say so.

• The volume is so low that setup costs more than the parts are worth.
• The tolerance is tighter than the process can hold without a second operation.
• The geometry cannot be made without a tool feature that will not pay back.
• The material you need is not available in the form the process requires.
• The schedule is shorter than the tooling or setup time, and nobody has said so yet.

None of these are refusals. They are reasons to look at a different route, and the earlier that conversation happens the cheaper it is. The most expensive mistake in manufacturing is a process chosen before the question was understood.

Planning the ramp from prototype to production

The gap between one good part and a thousand identical ones is a plan, not a machine. Three decisions close it.

First, freeze the design. Every change after tooling starts is a re-cut, and re-cuts are where schedules go. Second, decide the inspection level. A prototype is checked by eye; a production part is checked against a report. Third, agree the change process in writing, including who pays for it.

Write the ramp down as dates and owners, not as intentions. A ramp plan with three names and three dates is worth more than a page of good intentions.

FAQ About 360 Brass (C36000)

Is 360 brass suitable for outdoor use in coastal areas?
No. 360 brass has good corrosion resistance for indoor and mild outdoor use, but it can corrode in saltwater or high-humidity coastal environments. For these applications, a more corrosion-resistant alloy like 464 naval brass is recommended.

Can 360 brass be welded?
No. The lead content that makes it so machinable makes welding very difficult. The lead vaporizes at high temperatures, creating porosity and weak joints. For applications requiring welding, a lead-free brass like C37700 or a different material like stainless steel should be used.

What is the difference between 360 brass and C36000?
There is no difference. 360 brass is the common name, while C36000 is its official UNS (Unified Numbering System) designation. They refer to the exact same free-cutting, leaded brass alloy.

Our solution for 360 Brass (C36000)

YiguProto runs metal sourcing and machining in house, from a single prototype to a production batch. We quote the process, the material and the finish as separate lines, so you can see where the money goes instead of arguing with one number.

Send a STEP file or a drawing and you get a DFM report in one to two business days. It flags the features that add cost and the features that will not hold tolerance on the process you picked.

Every order ships with an inspection report on the features you call out. If a part misses, we make it again. Ready to price a part? Start with a free quote and DFM review, or read more about our metal sourcing and machining. You can also talk to an engineer before you commit to a drawing.

FAQ about 360 Brass (C36000)

The short version

360 Brass (C36000) rewards the buyer who reads the data sheet and the drawing together. Pick the option for the property that matters, not for the price per kilo.

Tighten only what mates. Test a sample before the run. Then let the process do the rest.