C4430 Brass

Grade Name

C4430 Tin Brass (Naval Brass)

Key Features

• Corrosion Resistance: Arsenic (0.02–0.06%) inhibits dezincification, ideal for marine environments.

• Machinability: Excellent hot-working (760–800℃) and cold-forming capabilities.

• Mechanical Properties: Tensile strength ≥315 MPa (annealed), elongation ≥15%.

• Compliance: Meets GB/T 14954-1994 and ASTM B111M standards.

Product Forms & Dimensions

Form	Size Range	Standards
Rod	Diameter 2–300mm, Length 1–12m	JIS H3250-2015
Plate	Thickness 0.5–60mm, Width 100–2000mm	ASTM B36/B36M
Wire	Diameter 0.2–12mm, Coil ≥3kg	JIS H3300-2018
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	59.0–61.0	Main Component (GB/T 14954)
Sn	1.0–1.5	Corrosion Resistance
As	0.02–0.06	Dezincification Inhibitor
Fe	≤0.10	Impurity Control
Pb	≤0.30	Limited Content 1
Zn	Balance	Balancing Component
Impurities	≤1.0	Total Limit

Physical Properties

Property	Value/Description
Density	8.53 g/cm³
Electrical Conductivity	25% IACS (20℃)
Thermal Conductivity	64.0 W/(m·K)
Thermal Expansion	20×10⁻⁶/℃ (20–300℃)

Mechanical Properties

Condition	Tensile Strength (MPa)	Elongation (%)	Hardness (HRB)
Annealed (O)	315–379	≥15	50–65 HRB
Hard (H)	≥410	≥8	≥80 HB

Core Advantages

1. Marine Durability: Ideal for condensers and heat exchangers in seawater.

2. Versatile Processing: Adaptable to hot/cold working and welding.

3. Cost Efficiency: Balances strength and affordability for mass production.

Applications

• Marine Engineering: Condenser tubes, ship fittings.

• Energy Systems: Heat exchangers in power plants.

• Architectural Hardware: Corrosion-resistant bolts and valves.

• Electronics: Connectors and heat sinks (with protective coatings).

Processing Guidelines

• Hot Working: 760–800℃, avoid 200–600℃ brittleness zone.

• Annealing: 550–650℃ to relieve stress and restore ductility.

• Post-Cold Working: Low-temperature annealing (200–300℃) to prevent stress corrosion.

FAQs

Q1: Differences between C4430 and C44300?

A: C44300 (ASTM) has higher Cu (69–71%) for extreme corrosion resistance, while C4430 focuses on cost-effectiveness.

Q2: Suitability for seawater?

A: Yes, but long-term exposure requires coatings and maintenance.

Standards

• GB/T 14954-1994: Chinese tin brass standard1.

• JIS H3300-2006: Japanese copper alloy tube standard8.

• ASTM B111M: U.S. condenser and heat exchanger tube standard9