Leaded Tin Bronze, UNS C92700, Copper Casting Alloy

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Leaded Tin Bronze, UNS C92700, 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: Bearings, bushings, pump impellers, piston rings, valve components, steam fittings, and gears. Superior machinability to C90500. Classified under: Leaded tin bronzes Typical data for sand-cast test bars. Alloy does not respond to heat treating
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Physical Properties	Metric	English	Comments

Density	8.80 g/cc	0.318 lb/in³

Mechanical Properties	Metric	English	Comments
Hardness, Brinell	77	77
Tensile Strength, Ultimate	290 MPa	42100 psi
Tensile Strength, Yield	145 MPa @Strain 0.5 %	21000 psi @Strain 0.5 %
Elongation at Break	20 %	20 %	in 50 mm
Modulus of Elasticity	110 GPa	16000 ksi
Machinability	45 %	45 %	UNS C36000 (free-cutting brass) = 100%

Electrical Properties	Metric	English	Comments
Electrical Resistivity	0.000015674 ohm-cm @Temperature 20.0 °C	0.000015674 ohm-cm @Temperature 68.0 °F

Thermal Properties	Metric	English	Comments
CTE, linear	18.0 µm/m-°C @Temperature 20.0 - 177 °C	10.0 µin/in-°F @Temperature 68.0 - 351 °F
Specific Heat Capacity	0.376 J/g-°C	0.0899 BTU/lb-°F
Thermal Conductivity	3.92 W/m-K	27.2 BTU-in/hr-ft²-°F
Melting Point	315 °C	599 °F	Incipient
	845 - 980 °C	1550 - 1800 °F
Solidus	845 °C	1550 °F
Liquidus	980 °C	1800 °F

Processing Properties	Metric	English	Comments
Annealing Temperature	260 °C	500 °F	Stress-Relieving Temperature

Component Elements Properties	Metric	English	Comments
Aluminum, Al	<= 0.0050 %	<= 0.0050 %
Copper, Cu	86 - 89 %	86 - 89 %
Iron, Fe	<= 0.15 %	<= 0.15 %
Lead, Pb	1.0 - 2.5 %	1.0 - 2.5 %
Nickel, Ni	<= 1.0 %	<= 1.0 %
Phosphorus, P	<= 0.25 %	<= 0.25 %
Tin, Sn	9.0 - 11 %	9.0 - 11 %
Zinc, Zn	<= 0.70 %	<= 0.70 %

References for this datasheet.

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MC92700b1 / 11942

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