CuZn36Pb1.5 Brass

Designation

CuZn36Pb1.5 (Leaded High-Zinc Brass)

International Standards: C3561 (JIS), CZ124Pb (BS), GB/T 1176-2013 (China).

Key Features

1. Superior Machinability: Lead content 1.2–1.8%, improves cutting efficiency by 30–50%.

2. Strength & Corrosion Resistance: Zn 36%, Cu 60–63%, stable in atmospheric environments.

3. Surface Finish: Post-machining roughness Ra 0.8–1.6μm.

4. RoHS Compliance: Lead content complies with industrial exemptions.

Product Forms & Dimensions

Form	Dimensions
Rod	Diameter: Φ3–100mm; Length: 1000–6000mm
Hex Bar	Across Flats: 5–50mm; Length: 1000–3000mm
Wire	Diameter: 1.0–20mm; Custom lengths
Castings	Customized (Max weight: 50kg)

Chemical Composition (%)

Element	Cu	Zn	Pb	Fe	Total Impurities
Content	60.0–63.0	Balance	1.2–1.8	≤0.1	≤0.5

Physical Properties

Property	Value
Density	8.6 g/cm³
Melting Point	890–910°C
Thermal Conductivity	105–115 W/(m·K)
Electrical Conductivity	26% IACS

Mechanical Properties

Condition	Tensile Strength (MPa)	Yield Strength (MPa)	Elongation (%)	Hardness (HV)
Cold-Drawn	550–650	450–550	≥5	160–190
As-Cast	200–250	80–120	≥10	70–90
Hot-Rolled	400–500	280–350	≥15	120–150

Core Advantages

1. High Efficiency Machining: Chip-breaking performance reduces tool wear.

2. Precision Surface: Ideal for high-tolerance components.

3. Cost Savings: 30% lower machining costs vs. lead-free brass.

Applications

• Automotive: Fuel injectors, sensor housings.

• Electronics: RF connectors, precision screws.

• Plumbing: Valve cores, faucet components.

Processing Guidelines

1. Machining: Cutting speed 80–120 m/min, feed rate 0.1–0.3 mm/rev.

2. Safety: Use fume extraction to avoid lead exposure.

3. Welding: Prohibit fusion welding; use silver-based brazing.

Key Application Scenarios

Industry	Typical Components	Requirements
Automotive	Fuel injection parts	Precision machining, oil resistance
Electronics	5G base station connectors	Conductivity, surface finish

FAQ

Q1: Is CuZn36Pb1.5 RoHS compliant?

A1: Yes, under specific industrial exemptions (e.g., electronic connectors).

Q2: How to dispose of leaded brass waste?

A2: Classify as hazardous waste and use certified recyclers.

Q3: Performance vs. lead-free brass?

A3: Better machinability but slightly lower conductivity (26% vs. 28% IACS).

Standards

Standard	Scope
GB/T 1176	Chinese cast copper alloys
JIS H3250	Japanese brass rod standards
ASTM B16	Free-cutting brass specs

Note: Actual parameters may vary depending on manufacturing processes.