Architectural Bronze, UNS C38500

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Architectural Bronze, UNS C38500
Categories:	Metal; Nonferrous Metal; Copper Alloy; Brass; Bronze
Material Notes:	This is technically a brass alloy (copper plus zinc) but is known as architectural bronze. Fair to excellent corrosion resistance. Excellent machinability and hot workability. Fabricated by hot forging and pressing, forming, bending and machining. Applications: architectural extrusion, store fronts, thresholds, trim, butts, hinges, lock bodies and forgings. Available as rod, shapes.
Key Words:	British Free Machining Brass, BS 2874 CZ121, ISO CuZn39Pb3
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Physical Properties	Original Value	Comments

Density	8.47 g/cc

Mechanical Properties	Original Value	Comments
Hardness, Rockwell B	65	M30 temper
Tensile Strength, Ultimate	415 MPa	M30 temper
Tensile Strength, Yield	140 MPa @Strain 0.5 %	M30 temper
Elongation at Break	30 %	in 50 mm, M30 temper
Modulus of Elasticity	97.0 GPa
Poissons Ratio	0.31	Calculated
Machinability	90 %	UNS C36000 (free-cutting brass) = 100%
Shear Modulus	37.0 GPa
Shear Strength	240 MPa	M30 temper

Electrical Properties	Original Value	Comments
Electrical Resistivity	0.00000620 ohm-cm @Temperature 20.0 °C

Thermal Properties	Original Value	Comments
CTE, linear	20.9 µm/m-°C @Temperature 20.0 - 300 °C
Specific Heat Capacity	0.380 J/g-°C
Thermal Conductivity	123 W/m-K @Temperature 20.0 °C
Melting Point	875 - 890 °C
Solidus	875 °C
Liquidus	890 °C

Processing Properties	Original Value	Comments
Annealing Temperature	425 - 600 °C
Hot-Working Temperature	625 - 725 °C

Component Elements Properties	Original Value	Comments
Copper, Cu	55 - 60 %
Iron, Fe	<= 0.35 %
Lead, Pb	2.0 - 3.8 %
Other, total	<= 0.50 %
Zinc, Zn	40 %

References for this datasheet.

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MC38500b1 / 11254

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