C34200 Brass

Grade Name

UNS Number: C34200
Common Name: Leaded Brass (Low-Lead Brass / CuZn37Pb)
Corresponding Standards: ASTM B453 (Leaded Brass Rod/Bar), ASTM B121 (Leaded Brass Sheet/Strip), DIN 17671-1.

Product Features

Excellent Machinability: Enhanced by lead content (1.5–2.5%) for superior chip-breaking and reduced tool wear.
High Corrosion Resistance: Suitable for atmospheric, freshwater, and limited marine environments.
Balanced Strength-Ductility: Tensile strength up to 586 MPa with elongation up to 60%.
Good Thermal and Electrical Conductivity: Ideal for heat exchangers and low-current electrical components.
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 %	62.0–66.5	Balance	1.5–2.5	≤0.10	≤0.5 (total impurities)
Complies with ASTM B453 and DIN 17671 standards.

Physical Properties

Property	Value
Density (g/cm³)	8.47–8.50
Melting Point (°C)	875–940
Electrical Conductivity (%IACS)	24–28 (Annealed)
Thermal Conductivity (W/m·K)	116 (at 20°C)
Values vary with processing conditions.

Mechanical Properties

Condition	Tensile Strength (MPa)	Yield Strength (MPa)	Elongation (%)	Hardness (HV)
Annealed	338–586	117–427	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. Free-Machining: Lead lubrication ensures high precision in automatic and CNC machining.

2. Durability: Resists wear and corrosion in humid and mild chemical environments.

3. Versatility: Compatible with cold/hot forming, welding, and forging.

4. Cost Efficiency: Optimized for high-volume industrial production.

Product Applications

Marine Engineering: Seawater valves, heat exchangers, and ship fittings.
Automotive: Radiator cores, fuel system components, and stamped parts.
Electronics: Connectors, terminals, and shielding components.
Industrial Hardware: Fasteners, gears, and bushings.
Plumbing: Low-pressure fittings and valve bodies.

Processing Considerations

Annealing: 500–700°C for 30–60 minutes to restore ductility after cold working.
Machining: Use sharp tools with lubricants to prevent galling.
Welding: Compatible with TIG and resistance welding; control heat input to avoid lead vaporization.
Surface Treatment: Electroplating or lacquering recommended for decorative uses.

Key Application Scenarios

Shipbuilding components exposed to seawater (with protective coatings).
High-precision automotive parts produced via CNC machining.
Architectural fixtures in humid environments.
Industrial fasteners and valve components.

FAQs

Q1: Is C34200 suitable for saltwater environments?

A: Yes for short-term exposure, but protective coatings are recommended for prolonged marine use due to potential lead leaching.

Q2: How does C34200 compare to C36000 brass?

A: C34200 has lower lead content (2.5% max vs. 3.7% in C36000), offering better environmental compliance but slightly reduced machinability.

Q3: Can C34200 be recycled?

A: Yes, but specialized recycling processes are required to manage lead content.

Standard References

Standard	Description
ASTM B453	Leaded brass rod, bar, and shapes.
ASTM B121	Leaded brass sheet and strip.
DIN 17671-1	Specifications for wrought copper alloy tubes.
SAE J463	Mechanical property standards for wrought copper alloys.

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

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