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

CuZn15 Brass

Brass

Designation

CuZn15 (15% Zinc Brass)

International Standards: CW502L (EN 12164), 2.0240 (DIN 1708), H85 (GB/T 5231).


Key Features

1. Balanced Composition: Zn 15%, Cu ≥84.5%, optimized strength and corrosion resistance.

2. Workability: Excellent for stamping, forging, and welding.

3. Corrosion Resistance: Stable in atmospheric and freshwater environments.

4. Conductivity: Electrical conductivity ≥48.0 Ω*mm²/m (annealed).

5. Aesthetic Appeal: Golden surface finish after polishing.


Product Forms & Dimensions

Form

Dimensions

Sheet

Thickness: 0.2–50mm; Width: 100–1500mm

Strip

Thickness: 0.1–3mm; Width: 10–600mm

Rod

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

Wire

Diameter: 0.1–20mm; Custom lengths

Tube

OD: 3–150mm; Wall Thickness: 0.3–8mm


Chemical Composition (%)

Element

Cu

Zn

Pb

Fe

Total Impurities

Content

84.5–86.5

Balance

≤0.03

≤0.05

≤0.2


Physical Properties

Property

Value

Density

8.75 g/cm³

Melting Point

1030–1050°C

Thermal Conductivity

110–115 W/(m·K)

Electrical Conductivity

48.0–50.0 Ω*mm²/m

Resistivity

3.5×10⁻⁸ Ω·m

Thermal Expansion

20.5×10⁻⁶/K（20–300°C）


Mechanical Properties

Condition

Tensile Strength (MPa)

Yield Strength (MPa)

Elongation (%)

Hardness (HV)

Annealed

270–320

120–180

≥35

70–90

Half-Hard

380–450

280–350

≥12

110–140

Hard

500–600

450–500

≥4

150–180


Core Advantages

1. Strength-Ductility Balance: 20% higher strength than CuZn10 with retained ductility.

2. Stress Corrosion Resistance: Lower dezincification risk vs. high-zinc brasses.

3. Cost Efficiency: 25–30% lower cost than pure copper.


Applications

  • Electronics: Connector terminals, relay springs.

  • Automotive: Fuel fittings, sensor housings.

  • Architecture: Door locks, bathroom fixtures.

  • Mechanical: Spring washers, bearing cages.


Processing Guidelines

1. Cold Working: Anneal at 400–550°C (N₂ protection).

2. Hot Working: Rolling temperature 680–750°C.

3. Welding: Use BAg-5 brazing or TIG welding.

4. Surface Treatment: Acid pickling before plating.


Key Application Scenarios

Industry

Typical Components

Requirements

Consumer Electronics

USB-C contacts

High elasticity, fatigue resistance

Automotive

Turbocharger oil fittings

Corrosion resistance, sealing

Architecture

High-end door lock cores

Wear resistance, aesthetics


FAQ

Q1: CuZn15 vs. CuZn30?

A1: CuZn30 has higher Zn (30%) for casting, while CuZn15 excels in forming.


Q2: Why lower conductivity than CuZn10?

A2: Increased zinc content disrupts electron flow.


Q3: How to prevent cracking during forming?

A3: Limit cold work deformation to ≤60% and anneal properly.


Standards

Standard

Scope

EN 12164

Rod/wire technical conditions

GB/T 5231

Chinese brass classifications

DIN 17660

Chemical & mechanical specs

ASTM B134

U.S. specifications for wire


Note: Actual parameters may vary depending on manufacturing processes.


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