Medium Bronze, UNS C94500, Copper Casting Alloy

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Medium Bronze, UNS C94500, Copper Casting Alloy
Categories:	Metal; Nonferrous Metal; Copper Alloy; Copper Casting Alloy
Material Notes:	Casting methods recommended for this alloy: Centrifugal and Sand. Applications: Locomotive wearing parts, high-speed low-load bearings. Classified under: High-leaded tin bronzes. ASTM B66 Alloy does not respond to heat treating
Key Words:	High lead tin bronze, ASTM B66
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Physical Properties	Metric	English	Comments

Density	9.40 g/cc	0.340 lb/in³

Mechanical Properties	Metric	English	Comments
Hardness, Brinell	50	50
Tensile Strength, Ultimate	170 MPa	24700 psi
Tensile Strength, Yield	83.0 MPa	12000 psi
Elongation at Break	12 %	12 %	in 50 mm
Modulus of Elasticity	72.0 GPa	10400 ksi
Compressive Strength	250 MPa	36300 psi
Fatigue Strength	69.0 MPa @# of Cycles 1.00e+8	10000 psi @# of Cycles 1.00e+8	rotating beam
Machinability	80 %	80 %	UNS C36000 (free-cutting brass) = 100%
Izod Impact	5.40 J	3.98 ft-lb

Electrical Properties	Metric	English	Comments
Electrical Resistivity	0.000017241 ohm-cm @Temperature 20.0 °C	0.000017241 ohm-cm @Temperature 68.0 °F
Magnetic Permeability	1.0	1.0

Thermal Properties	Metric	English	Comments
CTE, linear	18.5 µm/m-°C @Temperature 20.0 - 200 °C	10.3 µin/in-°F @Temperature 68.0 - 392 °F
Specific Heat Capacity	0.376 J/g-°C	0.0899 BTU/lb-°F
Thermal Conductivity	52.0 W/m-K @Temperature 20.0 °C	361 BTU-in/hr-ft²-°F @Temperature 68.0 °F
Melting Point	315 °C	599 °F	Incipient
	800 - 940 °C	1470 - 1720 °F
Solidus	800 °C	1470 °F
Liquidus	940 °C	1720 °F

Component Elements Properties	Metric	English	Comments
Aluminum, Al	<= 0.0050 %	<= 0.0050 %
Antimony, Sb	<= 0.80 %	<= 0.80 %
Copper, Cu	73 %	73 %
Iron, Fe	<= 0.15 %	<= 0.15 %
Lead, Pb	16 - 22 %	16 - 22 %
Nickel, Ni	<= 1.0 %	<= 1.0 %
Phosphorus, P	<= 0.50 %	<= 0.50 %
Silicon, Si	<= 0.0050 %	<= 0.0050 %
Sulfur, S	<= 0.080 %	<= 0.080 %
Tin, Sn	6.0 - 8.0 %	6.0 - 8.0 %
Zinc, Zn	<= 1.2 %	<= 1.2 %

References for this datasheet.

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MC94500b1 / 11957

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