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

C2400 Copper

Copper

Grade Name

C2400 Copper Alloy (Medium-Zinc Brass)


Key Features

  • Balanced Properties: Cu content 79–81%, high ductility and strength, suitable for cold/hot working.

  • Machinability: Pb ≤0.05%, excellent cutting performance.

  • Corrosion Resistance: Stable in dry, freshwater, and mild chemical environments.

  • Eco-Friendly: RoHS-compliant, low lead content.


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

79.0–81.0

Main Component (JIS H 3100)

Zn

Balance

Balance

Pb

≤0.05

RoHS Limit

Fe

≤0.10

ASTM B36

Impurities

≤0.3

JIS H 3100


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 alloys (e.g., C2200).

  • Cold Workability: Ideal for stamping and forging.

  • Surface Versatility: Compatible with plating and polishing.


Applications

  • Machinery: Gears, valves, and bearings.

  • Electronics: Low-current terminals and shielding components.

  • Architecture: Door handles and decorative strips.

  • Automotive: Radiator components and valves.


Processing Guidelines

  • Hot Working: 820–870℃, avoid brittleness at 200–600℃.

  • Annealing: 600–700℃ to relieve stress.

  • Cold Working: Control deformation to prevent cracks.


FAQs

Q1: Key differences between C2400 and C2200?

A: C2400 has lower Cu (79–81% vs. 89–91%), higher Zn, lower cost, and slightly reduced strength.


Q2: Is C2400 suitable for marine environments?

A: Not recommended for long-term seawater exposure; use protective coatings if necessary.


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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