Gilding Copper, UNS C21000, Half Hard Temper

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Gilding Copper, UNS C21000, Half Hard Temper
Categories:	Metal; Nonferrous Metal; Copper Alloy
Material Notes:	Good to excellent corrosion resistance. Excellent cold workability, good hot workability for blanking, coining, drawing, piercing and punching, shearing, spinning, squeezing and swaging, stamping. Applications: coins, medals, tokens, bullet jackets, firing pin supports, fuse caps, primers, emblems, plaques, base for gold plate. Available as flat products and wire.
Key Words:	CZ125, ISO CuZn5, CEN CW500L, Cap copper, 95/5 brass
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Physical Properties	Original Value	Comments

Density	8.86 g/cc

Mechanical Properties	Original Value	Comments
Hardness, Rockwell B	52
Hardness, Rockwell 30T	54
Tensile Strength, Ultimate	330 MPa
Tensile Strength, Yield	275 MPa
Elongation at Break	12 %	In 50 mm
Modulus of Elasticity	115 GPa
Poissons Ratio	0.307
Machinability	20 %	UNS C36000 (free-cutting brass) = 100%
Shear Modulus	44.0 GPa
Shear Strength	235 MPa

Electrical Properties	Original Value	Comments
Electrical Resistivity	0.00000244 ohm-cm @Temperature 1100 °C	liquid phase
	0.00000310 ohm-cm @Temperature 20.0 °C	annealed
Magnetic Susceptibility	-0.0000125 - -1.00e-6	SI units

Thermal Properties	Original Value	Comments
CTE, linear	18.0 µm/m-°C @Temperature 20.0 - 300 °C
Specific Heat Capacity	0.380 J/g-°C
Thermal Conductivity	234 W/m-K @Temperature 20.0 °C
Melting Point	1050 - 1065 °C
Solidus	1050 °C
Liquidus	1065 °C

Processing Properties	Original Value	Comments
Annealing Temperature	425 - 800 °C
Hot-Working Temperature	750 - 875 °C

Component Elements Properties	Original Value	Comments
Copper, Cu	94 - 96 %
Iron, Fe	<= 0.050 %
Lead, Pb	<= 0.050 %
Zinc, Zn	5.0 %

Descriptive Properties
Velocity of Sound	3.78 km/s	at 20°C

References for this datasheet.

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Overview of materials for Brass

MC21000b6 / 10983

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