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	Metric	English	Comments

Density	8.47 g/cc	0.306 lb/in³

Mechanical Properties	Metric	English	Comments
Hardness, Rockwell B	65	65	M30 temper
Tensile Strength, Ultimate	415 MPa	60200 psi	M30 temper
Tensile Strength, Yield	140 MPa @Strain 0.5 %	20300 psi @Strain 0.5 %	M30 temper
Elongation at Break	30 %	30 %	in 50 mm, M30 temper
Modulus of Elasticity	97.0 GPa	14100 ksi
Poissons Ratio	0.31	0.31	Calculated
Machinability	90 %	90 %	UNS C36000 (free-cutting brass) = 100%
Shear Modulus	37.0 GPa	5370 ksi
Shear Strength	240 MPa	34800 psi	M30 temper

Electrical Properties	Metric	English	Comments
Electrical Resistivity	0.00000620 ohm-cm @Temperature 20.0 °C	0.00000620 ohm-cm @Temperature 68.0 °F

Thermal Properties	Metric	English	Comments
CTE, linear	20.9 µm/m-°C @Temperature 20.0 - 300 °C	11.6 µin/in-°F @Temperature 68.0 - 572 °F
Specific Heat Capacity	0.380 J/g-°C	0.0908 BTU/lb-°F
Thermal Conductivity	123 W/m-K @Temperature 20.0 °C	854 BTU-in/hr-ft²-°F @Temperature 68.0 °F
Melting Point	875 - 890 °C	1610 - 1630 °F
Solidus	875 °C	1610 °F
Liquidus	890 °C	1630 °F

Processing Properties	Metric	English	Comments
Annealing Temperature	425 - 600 °C	797 - 1110 °F
Hot-Working Temperature	625 - 725 °C	1160 - 1340 °F

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

References for this datasheet.

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MC38500b1 / 11254

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