Brass is one of the most widely used metal materials in engineering, manufacturing, and everyday products. Its warm golden color is easy to recognize, but many people still ask: what is brass made of, exactly?
In simple terms, brass is a metal alloy made primarily from copper and zinc. By adjusting the ratio of these two metals—and sometimes adding small amounts of other elements—manufacturers can create brass materials with different strengths, colors, and machining performance.
This guide explains what brass is made of, how its composition affects performance, and why brass remains a popular material across many industries.
Table of Contents
What Is Brass Material?
Brass is not a pure metal. It is an alloy, meaning it is made by combining two or more elements to achieve specific properties.
Brass material is made of:
•Copper (Cu) – the main base metal
•Zinc (Zn) – the primary alloying element
Together, these two metals create an alloy that is stronger than copper, easier to machine, and more cost-effective for large-scale production.
So if you’re wondering:
•What is brass made of? → Copper and zinc
•What metals is brass made of? → Copper + zinc
•Is brass an alloy? → Yes
What Is Brass Made Of Percentages?
The exact composition of brass depends on the grade, but most brass alloys fall within a predictable range.
Typical brass composition:
•Copper: ~55% to 95%
•Zinc: ~5% to 45%
Higher copper content:
•Improves corrosion resistance
•Gives brass a redder, warmer color
Higher zinc content:
•Increases strength and hardness
•Produces a lighter yellow appearance
This flexibility is why brass can be tailored for plumbing parts, decorative hardware, precision CNC machining, and electrical components.
What Two Metals Is Brass Made Of?
Many people search for “brass is made of what two metals” or “brass is made up of what 2 elements”.
The answer is straightforward:
Brass is made of copper and zinc.
Other elements may be added in small amounts, but copper and zinc always form the foundation of brass material.
Additional Elements in Brass Alloys
While copper and zinc define brass, some alloys include minor additions to improve performance:
•Lead (Pb): Improves machinability (common in free-cutting brass)
•Tin (Sn): Enhances corrosion resistance (used in marine brasses)
•Aluminum / Silicon: Increases strength and wear resistance
•Arsenic: Helps reduce dezincification in plumbing applications
These additions do not change the core definition – brass is still a copper-zinc alloy – but they make certain grades better suited for specific environments.
Common Types of Brass and What They’re Made Of
Different brass types are created by changing copper-to-zinc ratios and additives.
Yellow Brass
•~60–70% copper, remainder zinc
•Bright yellow color
•Used for fittings, hardware, and decorative parts
Red Brass
•Higher copper content (often 85%+)
•Reddish appearance
•Excellent corrosion resistance
•Common in plumbing and valves
Free-Cutting Brass (e.g. C360)
•Copper + zinc + lead
•Outstanding machinability
•Ideal for CNC-machined precision parts
DZR Brass (Dezincification-Resistant Brass)
•Copper, zinc, and trace stabilizing elements
•Designed for hot water and plumbing systems
Is Brass Made of Steel or Iron?
A common misconception is whether brass contains steel or iron.
•Brass is NOT made of steel.
•Brass does NOT contain iron.
Steel is an iron-based alloy, while brass is copper-based. This is why brass:
•Is non-magnetic
•Does not rust like steel
•Has different strength and corrosion behavior
What Is Brass Used For?
Because of its balanced properties, brass material is widely used in:
•Plumbing fittings and valves
•Electrical connectors
•Musical instruments
•Decorative hardware
•CNC-machined components
•Automotive and industrial parts
Its combination of machinability, corrosion resistance, and visual appeal makes brass one of the most versatile engineering alloys.
Brass vs Copper vs Bronze (Quick Comparison)
| Material | Main Composition | Key Difference |
| Brass | Copper + Zinc | Easier to machine, golden color |
| Bronze | Copper + Tin | Stronger, better for marine use |
| Copper | Pure element | Highest conductivity, softer |
If you need easy machining and cost efficiency, brass is often the best choice.
Key Takeaway: What Is Brass Made Of?
To summarize clearly:
•Brass is made of copper and zinc
•Copper provides ductility and corrosion resistance
•Zinc adds strength and machinability
•Minor elements fine-tune performance
•Brass is an alloy, not a pure metal
Understanding what brass is made of helps engineers, buyers, and designers choose the right material for strength, appearance, cost, and long-term performance.
Brass Material FAQs
•Is brass 100% copper?
No. Brass always contains zinc and is never pure copper.
•Does brass rust?
Brass does not rust like iron, but it can tarnish or corrode under certain conditions.
•What is brass jewelry made of?
Usually copper and zinc, sometimes with surface coatings to prevent tarnishing.
•Why is brass good for CNC machining?
Brass produces clean chips, holds tight tolerances, and allows fast machining with minimal tool wear.
