Leaded Tin Bronze, UNS C92300, Copper Casting Alloy

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Leaded Tin Bronze, UNS C92300, Copper Casting Alloy
Categories:	Metal; Nonferrous Metal; Copper Alloy; Copper Casting Alloy
Material Notes:	Casting methods recommended for this alloy: Centrifugal, Continuous, and Sand. Applications: Valves, pipe fittings, and high-pressure steam castings. Superior machinability to C90300. Classified under: Leaded tin bronzes. ASTM B584; formerly ASTM B143-2B Data typical for sand-cast test bars. Alloy does not respond to heat treating
Key Words:	Leaded tin bronze, ASTM B584; ASTM B143-2B
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Physical Properties	Original Value	Comments

Density	8.80 g/cc

Mechanical Properties	Original Value	Comments
Hardness, Brinell	70
Tensile Strength, Ultimate	275 MPa
Tensile Strength, Yield	138 MPa @Strain 0.5 %
Elongation at Break	25 %	in 50 mm
Modulus of Elasticity	97.0 GPa
Compressive Strength	69.0 MPa	at permanent set of 0.1%
	240 MPa	at permanent set of 10%
Machinability	42 %	UNS C36000 (free-cutting brass) = 100%
Izod Impact	18.3 J

Electrical Properties	Original Value	Comments
Electrical Resistivity	0.000014367 ohm-cm @Temperature 20.0 °C	12% IACS

Thermal Properties	Original Value	Comments
CTE, linear	18.0 µm/m-°C @Temperature 20.0 - 177 °C
Specific Heat Capacity	0.376 J/g-°C
Thermal Conductivity	75.0 W/m-K
Melting Point	855 - 1000 °C
Solidus	855 °C
Liquidus	1000 °C
Shrinkage	1.6 %	Patternmaker's Shrinkage (3/16 in./ft.)

Processing Properties	Original Value	Comments
Annealing Temperature	260 °C	Stress-Relieving Temperature

Component Elements Properties	Original Value	Comments
Aluminum, Al	<= 0.0050 %
Antimony, Sb	<= 0.25 %
Copper, Cu	85 - 89 %
Iron, Fe	<= 0.25 %
Lead, Pb	<= 1.0 %
Nickel, Ni	<= 1.0 %
Phosphorus, P	<= 0.050 %
Silicon, Si	<= 0.0050 %
Sulfur, S	<= 0.050 %
Tin, Sn	7.0 - 9.0 %
Zinc, Zn	2.5 - 5.0 %

References for this datasheet.

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MC92300b1 / 11938

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