C34000 Brass

Grade Name

UNS Number: C34000
Common Name: Leaded Brass (CuZn37Pb)
Corresponding Standards: ASTM B453, ASTM B121, DIN 17671-1.

Product Features

Excellent Machinability: Lead (0.8–1.4%) enhances chip-breaking and reduces tool wear.
High Corrosion Resistance: Performs well in atmospheric, freshwater, and marine environments.
Superior Cold/Hot Workability: Suitable for stamping, deep drawing, and forging.
Balanced Strength-Ductility: Tensile strength up to 520 MPa with elongation up to 60%.
Cost-Effective: Lower copper content (62–66.5%) reduces material costs.

Common Product Forms & Dimensions

Form	Thickness (mm)	Width (mm)	Length (mm)	Diameter (mm)
Sheet/Strip	0.2 – 6.0	50 – 600	Custom	-
Rod/Bar	-	-	Custom	3 – 50
Wire	-	-	Custom	0.3 – 12
Tube	1 – 12 (wall)	-	Custom	10 – 150 (OD)
Note: Custom dimensions are available upon request.

Chemical Composition

Element	Cu	Zn	Pb	Fe	Others
Weight %	62.5–66.5	Balance	0.8–1.4	≤0.10	≤0.5 (total)
Data per ASTM B453 and DIN 17671 standards.

Physical Properties

Property	Value
Density (g/cm³)	8.47
Melting Point (°C)	905
Electrical Conductivity (%IACS)	24–28 (Annealed)
Thermal Conductivity (W/m·K)	115 (at 20°C)
Values vary with processing conditions.

Mechanical Properties

Condition	Tensile Strength (MPa)	Yield Strength (MPa)	Elongation (%)	Hardness (HV)
Annealed	380–520	103–414	40–60	70–95
Cold Worked (H02)	440–540	340–470	12–27	110–160
Hard (H04)	≥540	≥470	≥6	≥160
Data applies to standard thicknesses and processing states.

Core Advantages

1. Machinability: Free-machining due to lead lubrication.

2. Corrosion Resistance: Ideal for marine and industrial applications.

3. Formability: Excellent cold/hot workability for complex shapes.

4. Cost Efficiency: Lower copper content reduces expenses.

Product Applications

Marine Engineering: Seawater valves, heat exchangers.
Electronics: Connectors, terminals, shielding components.
Aerospace: Fasteners, engine parts.
Construction: Decorative hardware, plumbing fittings.
Industrial: Stamped parts, bushings, gears.

Processing Considerations

Annealing: 540–600°C to restore ductility after cold working.
Machining: Use sharp tools and lubricants to avoid galling.
Welding: Compatible with TIG and resistance welding; avoid overheating to prevent lead vaporization.
Surface Treatment: Electroplating or lacquering recommended for decorative uses.

Key Application Scenarios

Shipbuilding components exposed to seawater.
Precision automotive stamped parts.
Architectural fixtures in humid environments.
High-volume industrial fasteners.

FAQs

Q1: Is C34000 suitable for saltwater environments?

A: Yes, but prolonged exposure requires protective coatings due to potential lead leaching.

Q2: How does C34000 compare to C36000 brass?

A: C34000 has lower lead content (1.4% max vs. 3.7% in C36000), offering better environmental compliance but slightly reduced machinability.

Q3: Can C34000 be recycled?

A: Yes, but lead content requires specialized recycling processes to minimize environmental impact.

Standard References

Standard	Description
ASTM B453	Leaded brass rod, bar, and shapes.
DIN 17671-1	Specifications for wrought copper alloy tubes.
ASTM B121	Leaded brass sheet and strip.

Note: Specifications may vary slightly depending on manufacturer and processing methods. Always consult technical datasheets for critical applications.

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