Cartridge Brass Copper Alloy - CDA 260

Element

Composition (%)

Copper (Cu)

68.5 - 71.5%

Zinc (Zn)

28.5 - 31.5%

Lead (Pb)

0.07% max

Iron (Fe)

0.05% max

Property

Value

Units

Density

8.53

g/cm³

Specific Gravity

8.53

-

Melting Range

915 - 955

°C

Specific Heat

0.377

J/g·K

Thermal Conductivity

121

W/m·K

Thermal Expansion Coefficient

19.9

µm/m·°C

Electrical Conductivity

28

% IACS

Electrical Resistivity

6.16 x 10⁻⁸

Ω·m

Magnetic Properties

Nonmagnetic

-

Property

Value

Units

Tensile Strength, Ultimate

393 - 455

MPa

Tensile Strength, Yield

365 - 434

MPa

Elongation at Break

2 - 6

%

Hardness, Rockwell B

70 - 82

HRB

Shear Strength

230

MPa

Shear Modulus

41.2

GPa

Modulus of Elasticity

110

GPa

Fatigue Strength

158

MPa

Property

Value

Units

Melting Range

915 - 955

°C

Thermal Conductivity

121

W/m·K

Specific Heat

0.377

J/g·K

Thermal Expansion Coefficient

19.9

µm/m·°C

Property

Characteristic

Notes

Cold Workability

Excellent

Highest ductility in yellow brass series

Hot Formability

Fair

Alloy should be hot formed

Machinability

Good

Machinability rating: 30%

Soldering

Excellent

-

Brazing

Excellent

-

Oxyacetylene Welding

Good

-

Gas Shielded Arc Welding

Good

-

Coated Metal Arc Welding

Not Recommended

-

Spot Welding

Fair

-

Seam Welding

Not Recommended

-

Butt Welding

Good

-

Annealing Temperature

800-1400°F (427-760°C)

-

Hot Working Temperature

1350-1550°F (732-843°C)

-