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Ningbo Jintian Copper (Group) Co., Ltd.
Ningbo Jintian Copper (Group) Co., Ltd.
Code
Brass

CuZn33 Brass

Brass

Designation

CuZn33 (30% Zinc Brass)

  • International Standards: CW509L (EN 12163), Cz107, ZCuZn33Pb2 (cast leaded brass variant).

  • Chinese Standards: GB/T 5231 (H68), GB/T 1176-2013 (cast leaded brass).


Key Features

1. High Plasticity & Strength: Best plasticity among brasses, ideal for deep drawing.

2. Machinability: Suitable for forging, welding, and cutting.

3. Corrosion Resistance: Stable in general environments but prone to cracking in ammonia.

4. Conductivity: 27% IACS electrical conductivity, 116–142 W/(m·K) thermal conductivity.


Product Forms & Dimensions

Form

Dimensions

Sheet

Thickness: 0.5–50mm; Width: 100–1500mm

Rod

Diameter: Φ5–300mm; Length: 1000–6000mm

Tube

OD: 5–150mm; Wall Thickness: 0.5–10mm

Wire

Diameter: 1.0–20mm; Custom lengths

Castings

Customized (Max weight: 50kg)


Chemical Composition (%)

Element

Cu

Zn

Pb

Fe

Others

Content

63–67

Balance

≤0.05

≤0.05

≤0.3

Note: Leaded variant (ZCuZn33Pb2) contains 1.0–3.0% Pb.


Physical Properties

Property

Value

Density

8.53 g/cm³

Melting Point

900–932°C

Thermal Conductivity

116–142 W/(m·K)

Electrical Conductivity

27% IACS


Mechanical Properties

Condition

Tensile Strength (MPa)

Yield Strength (MPa)

Elongation (%)

Hardness (HV)

Annealed

300–350

120–150

≥40

80–100

Cold-Rolled

410–650

250–450

≥8

150–180

As-Cast

≥180

≥70

≥12

≥490 (HBS)


Core Advantages

1. Deep-Drawing Capability: Ideal for cartridge cases and radiators.

2. Cost-Effectiveness: Lower cost due to high zinc content.

3. Versatility: Tailorable with Pb/Si for specific applications.


Applications

  • Manufacturing: Radiator shells, valves, cartridge cases.

  • Construction: Decorative hardware, lighting fixtures.

  • Casting: Water equipment housings (leaded variants).


Processing Guidelines

1. Cold Working: Anneal at 600–650°C for soft state.

2. Casting: Melt at 1100–1150°C with charcoal protection.

3. Welding: Use silver-based brazing to avoid cracks.


Key Application Scenarios

Industry

Typical Components

Requirements

Military

Cartridge cases

High plasticity, low cost

Architecture

Bathroom fittings

Aesthetic finish


FAQ

Q1: CuZn33 vs. CuZn30?

A1: CuZn33 has higher Zn (33%) for deep drawing; CuZn30 focuses on casting.


Q2: How to prevent dezincification?

A2: Apply protective coatings or avoid chlorine/sulfur environments.


Q3: Is ZCuZn33Pb2 RoHS-compliant?

A3: Standard variants exceed 0.1% Pb; low-Pb versions require customization.


Standards

Standard

Scope

EN 12163

Rod/wire technical conditions

GB/T 5231

Chinese brass classifications

ASTM B584

Copper alloy castings


Note: Actual parameters may vary depending on manufacturing processes.


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