C21000 Copper

Grade Name

UNS Number: C21000
Common Name: Phosphorus-Deoxidized Copper (High-Strength Brass)
Corresponding Standards: ASTM B36/B36M, GB/T 5231-2012.

Product Features

High Corrosion Resistance: Particularly suitable for marine and industrial environments.
Excellent Electrical & Thermal Conductivity: Ideal for electrical and heat exchange applications.
Superior Machinability: Supports cold/hot rolling, forging, and welding.
Eco-Friendly: Low lead content (≤0.05%) meets environmental standards.
High Strength & Ductility: Balances tensile strength and elongation in annealed or cold-worked states.

Common Product Forms & Dimensions

Form	Thickness (mm)	Width (mm)	Length (mm)	Diameter (mm)
Sheet/Strip	0.5 – 10	100 – 600	Custom	-
Rod/Bar	-	-	Custom	5 – 50
Wire	-	-	Custom	0.5 – 10
Tube	1 – 20 (wall)	-	Custom	10 – 200 (OD)
Note: Custom dimensions are available based on requirements.

Chemical Composition

Element	Cu	Zn	Pb	Fe	P	Others
Weight %	94–96	Balance	≤0.05	≤0.05	≤0.01	≤0.1
Data per ASTM B36 and GB/T 5231 standards.

Physical Properties

Property	Value
Density (g/cm³)	8.86–8.94
Melting Point (°C)	1049
Electrical Conductivity (%IACS)	80–85 (Annealed)
Thermal Conductivity (W/m·K)	120–391 (at 20°C)
Values vary with processing conditions.

Mechanical Properties

Condition	Tensile Strength (MPa)	Yield Strength (MPa)	Elongation (%)	Hardness (HV)
Annealed	220–290	69–100	35–45	40–60
Cold Worked (H01)	255–325	200–250	20–30	50–70
Cold Worked (H04)	345–405	300–350	10–15	80–100
Data covers varying thicknesses and processing states.

Core Advantages

1. Marine-Grade Durability: Resists seawater corrosion and stress cracking.

2. Versatile Fabrication: Compatible with TIG welding, cold/hot forming, and machining.

3. Cost-Effective: High performance-to-cost ratio for industrial applications.

Product Applications

Electrical Systems: Connectors, busbars, semiconductor components.
Marine Engineering: Heat exchangers, seawater pipes, ship fittings.
Mechanical Components: Valves, bearings, rivets.
Chemical Equipment: Corrosion-resistant tanks, pumps, and pipelines.

Processing Considerations

Hot Working: Recommended temperature range: 730–850°C; avoid edge cracking.
Annealing: 540–600°C to restore ductility.
Welding: Use TIG with inert gas shielding; control heat input to prevent brittleness.

Key Application Scenarios

Power distribution systems in marine vessels.
Renewable energy infrastructure (e.g., offshore wind turbines).
Automotive electrical connectors and cooling systems.
Chemical processing plants with corrosive environments.

FAQs

Q1: Is C21000 suitable for seawater environments?

A: Yes, its corrosion resistance makes it ideal for marine applications, but regular maintenance is advised.

Q2: How does cold working affect mechanical properties?

A: Cold working increases tensile strength and hardness but reduces elongation.

Q3: Does C21000 comply with environmental regulations?

A: Yes, low lead content (≤0.05%) meets RoHS and drinking water standards.

Standard References

Standard	Description
ASTM B36/B36M	Specifications for brass sheet, strip, and rolled bar.
ASTM B134	Standard for brass wire.
SAE J463	Mechanical property standards for wrought copper alloys.

Note: Specifications may vary slightly depending on manufacturer and processing methods. Always consult technical datasheets for critical applications.

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