C3604 Brass Chemical Composition and Standard Specifications
C3604 brass is a widely used free-cutting brass alloy known for its excellent machinability, high strength, and corrosion resistance. This alloy is commonly used in precision machining applications, electrical components, plumbing fittings, and industrial hardware. In this blog, we will explore the chemical composition, mechanical properties, and standard specifications of C3604 brass.
What is C3604 Brass?
C3604 is a free-cutting brass alloy, primarily composed of copper (Cu) and zinc (Zn), with a small percentage of lead (Pb) to enhance machinability. It belongs to the C36000 brass category in the Unified Numbering System (UNS) and is widely used in industries that require high-speed machining with minimal tool wear.
Chemical Composition of C3604 Brass
The chemical composition of C3604 brass is regulated by various standards such as JIS (Japanese Industrial Standards). The typical composition is as follows:
| Element | Composition (%) |
|---|---|
| Copper (Cu) | 57.0 - 61.0 |
| Zinc (Zn) | Balance |
| Lead (Pb) | 1.8 - 3.7 |
| Iron (Fe) | ≤ 0.5 |
| Nickel (Ni) | ≤ 0.3 |
| Others | ≤ 0.3 |
Key Features of C3604 Chemical Composition:
- High copper content (57-61%) ensures excellent corrosion resistance and thermal conductivity.
- Lead (1.8-3.7%) improves machinability, making C3604 one of the best free-cutting brass alloys.
- Balanced zinc content provides strength and toughness while maintaining good workability.
- Low iron and nickel content to avoid brittleness and enhance durability.
Mechanical Properties of C3604 Brass
C3604 brass exhibits outstanding mechanical properties, which make it ideal for precision machining applications. The general mechanical characteristics include:
| Property | Value |
|---|---|
| Density | 8.5 g/cm³ |
| Melting Point | 890 - 920°C |
| Tensile Strength | 350 - 550 MPa |
| Yield Strength | 100 - 300 MPa |
| Elongation | 10 - 30% |
| Hardness (HB) | 80 - 120 |
| Electrical Conductivity | 23 - 28% IACS |
Standards and Equivalent Grades
C3604 brass complies with several international standards. Below are the equivalent grades in different standards:
| Standard | Equivalent Grade |
|---|---|
| JIS (Japan) | C3604 |
| UNS (USA) | C36000 |
| EN (Europe) | CW603N |
| ISO | CuZn39Pb3 |
| DIN (Germany) | 2.0401 |
| BS (UK) | CZ121 |
| ASTM (USA) | B16 |
Applications of C3604 Brass
C3604 brass is widely used in various industries due to its excellent machinability and strength. Some common applications include:
- Automotive components – bushings, fittings, and valves
- Electrical connectors – terminals and switch components
- Precision machined parts – screws, nuts, and gears
- Plumbing fittings – faucets, pipe connectors, and couplings
- Industrial machinery – fasteners and bearings
Why Choose C3604 Brass?
- Superior machinability – Ideal for high-speed machining
- Good corrosion resistance – Suitable for both industrial and marine environments
- High strength and durability – Provides long service life
- Excellent electrical conductivity – Used in electrical and electronic applications
C3604 brass is a versatile and highly machinable brass alloy with excellent mechanical properties. Its chemical composition, strength, and international standards compliance make it a preferred choice for precision machining, electrical components, and industrial applications. If you are looking for high-quality C3604 brass products, Lexus Metal Alloys offers superior-grade brass alloys tailored to your industry needs.