C260

Cartridge Brass (70/30) Plate

C26000

Overview

C260, also known as Cartridge Brass, is one of the most widely used copper-zinc alloys. With 70% copper and 30% zinc, it offers an excellent combination of strength, ductility, and corrosion resistance. Its outstanding cold-working properties make it the go-to alloy for deep drawing, stamping, and forming applications. It is not suitable for hot working but has excellent solderability and brazeability.

Chemical Composition

Element	Min	Max
Copper (Cu)	68.5	71.5
Zinc (Zn)	28.5	31.5
Lead (Pb)	0	0.07
Iron (Fe)	0	0.05

Alloy Designations

UNSC26000

ASTMB36, B19, B569

SAEJ461, J463

AMS4507

FederalQQ-B-613, QQ-B-626

Mechanical Properties

Tensile Strength44,000 – 76,000 psi

Yield Strength (0.5% ext.)14,000 – 62,000 psi

Elongation in 2"8 – 65%

Rockwell HardnessF55 – B78

Shear Strength32,000 – 50,000 psi

Physical Properties

Density0.308 lb/in³ (8.53 g/cm³)

Melting Point1,680 – 1,750 °F (916 – 954 °C)

Electrical Conductivity28% IACS

Thermal Conductivity70 BTU/ft·hr·°F

Modulus of Elasticity16,000 ksi

Coefficient of Thermal Expansion11.1 × 10⁻⁶ /°F

Typical Applications

Ammunition components and cartridge cases
Radiator cores, tanks, and header plates
Electrical connectors and lamp fixtures
Hardware, fasteners, and rivets
Architectural trim and decorative panels
Musical instrument components
Plumbing fittings and accessories
Stamped and formed parts

Fabrication & Joining

Excellent cold workability — ideal for deep drawing, spinning, and stamping
Not recommended for hot working
Readily soldered and brazed
Suitable for all mechanical joining methods
Machinability rating: 30% (compared to C360 at 100%)
Stress-relief anneal recommended after heavy cold work

Need C260 Brass Plate?

Contact our sales engineers for a custom quote on C260 (C26000) brass plate — tailored dimensions, tempers, and finishing options for your exact specifications.

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