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

C2300 Copper

Copper

Grade Name

C2300 Copper Alloy (Medium-Zinc Brass)


Key Features

  • Balanced Properties: Moderate copper content (83–85%) with excellent cold workability.

  • High Ductility: Elongation ≥30% after annealing, ideal for complex shaping.

  • Corrosion Resistance: Stable in dry and neutral environments.

  • Eco-Friendly: Compliant with RoHS and REACH regulations (Pb ≤0.05%).


Product Forms & Dimensions

Form

Size Range

Standards

Rod

Diameter 2–300mm, Length 1–12m

JIS H 3250-1992

Plate

Thickness 0.5–60mm, Width 100–2000mm

ASTM B36/B36M

Wire

Diameter 0.2–12mm, Coil ≥3kg

JIS H 3300-2018

Tube

OD 5–300mm, Wall Thickness 0.5–30mm

EN 12449: 1999

Strip

Thickness 0.1–2.5mm, Width ≤250mm

ASTM B134


Chemical Composition

Element

Content (%)

Standard Range

Cu

83.0–85.0

Main Component (JIS H 3100)

Zn

Balance

Balance

Pb

≤0.05

RoHS Limit

Fe

≤0.05


Impurities

≤0.3



Physical Properties

Property

Value/Description

Density

8.75 g/cm³

Melting Point

930–980℃

Electrical Conductivity

25% IACS (20℃)

Thermal Conductivity

115 W/(m·K)

Thermal Expansion

20×10⁻⁶/℃ (20–300℃)


Mechanical Properties

Condition

Tensile Strength (MPa)

Elongation (%)

Hardness (HRB)

Annealed (O)

235–345

≥30

50–65 HRB

Half-Hard (H02)

345–440

≥20

70–80 HRB

Hard (H04)

≥440

≤10

≥85 HRB


Core Advantages

  • Cost Efficiency: Lower cost than high-copper brass alloys (e.g., C2200).

  • Cold Workability: Optimized for stamping, drawing, and forging.

  • Surface Versatility: Compatible with plating, painting, and polishing.


Applications

  • Architectural Hardware: Locks, hinges, and handles.

  • Electronics: Low-current terminals and shielding components.

  • Industrial Stamping: Gaskets, springs, and metal meshes.

  • Decorative Items: Lighting frames, furniture trims, medals.


Processing Guidelines

  • Prioritize Cold Working: Avoid processing at 200–600℃ to prevent brittleness.

  • Annealing: 600–700℃ to relieve stress and restore ductility.

  • Surface Protection: Apply nickel plating or passivation for corrosion resistance.


FAQs

Q1: Key differences between C2300 and C2200?

A: C2300 has lower Cu (83–85% vs. 89–91%), higher Zn, lower cost, and slightly reduced strength.


Q2: Is C2300 suitable for humid environments?

A: Short-term exposure is acceptable; long-term use requires protective coatings.


Standards

  • JIS H 3100-2018: Copper and copper alloy sheets/plates.

  • ASTM B36/B36M: Brass plates and strips.

  • EN 12449: 1999: Seamless copper tubes for general purposes.


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