C27000 Brass

Grade Name

UNS Number: C27000

Common Names: Brass (65% Cu, 35% Zn), 65/35 Brass

Applicable Standards:

• ASTM B36/B36M (Brass Sheet/Strip)

• ASTM B134 (Brass Wire)

• SAE J463 (Wrought Copper Alloys)

• DIN 17660 (European Standard: 2.0360)

Product Features

• Superior Cold Formability: Ideal for deep drawing, bending, and complex forming operations.

• High Strength-Ductility Balance: >50% elongation in annealed state; strength significantly increases after cold working.

• Good Corrosion Resistance: Suitable for atmospheric, freshwater, and low-corrosion industrial environments.

• Excellent Machinability: Delivers high surface finish with minimal tool wear.

• Eco-Friendly & Cost-Effective: Lead content ≤0.07% (RoHS compliant); optimized zinc content reduces material costs.

• Decorative Appeal: Bright yellow surface ideal for architectural and consumer product designs.

Common Product Forms & Dimensions

Note: Custom sizes available (e.g., forged rounds, turned bars). Stock dimensions typically cover 6–300mm thickness.

C27000 Brass Composition (Chemical Composition)

*Complies with ASTM B36 and SAE J463. Low-lead design meets environmental regulations.*

Physical Properties

Note: Hot working temp.: 820–870°C; Annealing temp.: 520–650°C.

Mechanical Properties

Data based on 1mm thickness. Actual values vary with dimensions and processing.

Core Advantages

1. Exceptional Cold Formability: >95% success rate in deep drawing (e.g., cartridge cases, precision stampings).

2. High Cost Efficiency: 35% zinc content reduces raw material costs for high-volume production.

3. Surface Treatment Adaptability: Compatible with plating, polishing, and painting for functional/decorative uses.

4. Environmental Resistance: Resists oxidation in humid conditions and corrosion in freshwater.

Product Applications

• Architectural Decor: Door handles, light fixtures, trim.

• Electronics: Connectors, terminals, EMI shielding.

• Automotive: Radiator cores, fuel system components.

• Plumbing: Low-pressure valve bodies, fittings.

• Industrial: Fasteners, springs, stamped hardware.

Processing Guidelines

• Hot Working: Control temp. at 820–870°C; avoid edge cracking (hot extrusion recommended).

• Cold Working: Anneal (600–700°C) to restore ductility; use lubricants to prevent galling.

• Welding: Compatible with TIG/resistance welding. Apply low-temp stress relief (260–270°C); limit heat input to prevent zinc vaporization.

• Surface Treatment: Acid clean before plating; apply clear coat for decorative parts.

Key Application Scenarios

• Architectural Restoration: Vintage hardware for hotels/historical buildings.

• Electronics Manufacturing: Stamped terminals for mobile devices/PCs.

• Automotive Thermal Systems: Radiator cores in EVs.

• Plumbing Hardware: Valves and bathroom accessories.

FAQs

Q1: How does brass C27000 differ from C26000 (70/30 Brass)?

A: C27000 has lower copper content (65% vs. 70%), reducing costs by ~15% but with slightly lower strength/conductivity. Ideal for decorative & medium-load parts.

Q2: Is it suitable for marine environments?

A: Only for freshwater/low-salinity applications. Requires protective coatings (e.g., nickel) for saltwater; prolonged exposure risks dezincification corrosion.

Q3: Does it comply with environmental regulations?

A: Lead content ≤0.07% meets RoHS. SGS reports available. Fully recyclable.

Standard References