service@jtgroup.com.cn
+86-057483005999
+86-18057437999
en
en
Ningbo Jintian Copper (Group) Co., Ltd.
Ningbo Jintian Copper (Group) Co., Ltd.
Code
Brass

CuZn30 Brass

Brass

Designation

CuZn30 (30% Zinc Brass)

International Standards: CW505L (EN 12164), 2.0265 (DIN 17660), H68 (GB/T 5231)


Key Features

1. High Zinc Content: Zn 30%, Cu 60–63%, optimized for strength and casting.

2. Workability: Suitable for casting and hot rolling; cold working requires controlled deformation.

3. Corrosion Resistance: Stable in atmospheric environments; prone to dezincification in chlorine/sulfur.

4. Conductivity: Electrical conductivity 28% IACS, thermal conductivity ≥100 W/(m·K).

5. Cost Efficiency: Lower material cost due to high zinc content.


Product Forms & Dimensions

Form

Dimensions

Sheet

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

Rod

Diameter: Φ10–300mm; Length: 1000–6000mm

Tube

OD: 5–150mm; Wall Thickness: 0.5–10mm

Castings

Customized (Max weight: 50kg)

Wire

Diameter: 1.0–20mm; Custom lengths


Chemical Composition (%)

Element

Cu

Zn

Pb

Fe

Total Impurities

Content

60.0–63.0

Balance

≤0.1

≤0.1

≤0.5


Physical Properties

Property

Value

Density

8.5 g/cm³

Melting Point

900–925°C

Thermal Conductivity

100–110 W/(m·K)

Electrical Conductivity

28% IACS

Resistivity

6.0×10⁻⁸ Ω·m

Thermal Expansion

21.2×10⁻⁶/K（20–300°C）


Mechanical Properties

Condition

Tensile Strength (MPa)

Yield Strength (MPa)

Elongation (%)

Hardness (HV)

As-Cast

300–350

–

10–15

80–100

Hot-Rolled

400–500

250–300

≥20

100–130

Cold-Rolled

550–650

450–500

≥8

150–180


Core Advantages

1. High Strength & Wear Resistance: Cold-rolled tensile strength up to 650 MPa.

2. Superior Castability: Ideal for intricate castings (e.g., faucet bodies).

3. Economic Efficiency: 15–20% lower cost than low-zinc brasses.


Applications

  • Hardware: Locks, valve cores (casting + polishing).

  • Mechanical: Gears, bearing cages.

  • Decoration: Antique-style fixtures, lamp frames.

  • Military: Training cartridge cases (non-combat).


Processing Guidelines

1. Casting: Melt at 1100–1150°C with charcoal cover.

2. Cold Working: Anneal at 450–550°C (protective atmosphere).

3. Welding: Use BAg-7 brazing; avoid fusion welding.

4. Surface Protection: Nickel/chrome plating or passivation.


Key Application Scenarios

Industry

Typical Components

Requirements

Plumbing

Faucet bodies, showerheads

Casting precision, corrosion resistance

Machinery

Gear blanks, bushings

High strength, wear resistance

Military

Training cartridge cases

Cost-effectiveness, machinability


FAQ

Q1: CuZn30 vs. low-zinc brass (e.g., CuZn20)?

A1: CuZn30 has higher Zn (30%) for casting, while CuZn20 focuses on forming.


Q2: How to prevent dezincification?

A2: Apply protective coatings (Ni/Cr) or avoid chlorine/sulfur exposure.


Q3: Why low conductivity?

A3: High zinc content disrupts electron flow, reducing conductivity to 28% IACS.


Standards

Standard

Scope

EN 12164

Rod/wire technical conditions

GB/T 5231

Chinese brass classifications

DIN 17660

Chemical & mechanical specs

ASTM B584

Copper alloy castings


Note: Actual parameters may vary depending on manufacturing processes.


Start Your Partnership With JINTIAN COPPER!
Whether you have any questions about our products, please feel free to contact us, we will reply as soon as possible.
Related JINTIAN DIN
News from Ningbo Jintian Copper (Group) Co., Ltd
How Hard Is a Front Flip for Humanoid Robots?
11
Apr 2025
How Hard Is a Front Flip for Humanoid Robots? Learn More
Hollow Cup Precision Breakthrough Pending: Frameless Torque Industrialization Accelerates
Tue 04 2025
Hollow Cup Precision Breakthrough Pending: Frameless Torque Industrialization Accelerates Learn More
How Copper Tubing Enhance Energy Efficiency in HVAC Systems with Innovative Technology?
Sat 04 2025
How Copper Tubing Enhance Energy Efficiency in HVAC Systems with Innovative Technology? Learn More