C2400 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 than C2200.

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