High-Leaded Tin Bronze, UNS C94300, Copper Casting Alloy

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High-Leaded Tin Bronze, UNS C94300, Copper Casting Alloy
Categories:	Metal; Nonferrous Metal; Copper Alloy; Copper Casting Alloy
Material Notes:	Casting methods recommended for this alloy: Centrifugal and Sand. Applications: High-speed bearings for light loads. Classified under: High-leaded tin bronzes. ASTM B66; ASTM B584; formerly ASTM B144-3E Typical data for sand-cast test bars. Alloy does not respond to heat treating. Casting shrinkage allowance is 1.5%
Key Words:	High lead tin bronze, ASTM B66, ASTM B584, ASTM B144-3E
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Physical Properties	Metric	English	Comments

Density	9.29 g/cc	0.336 lb/in³

Mechanical Properties	Metric	English	Comments
Hardness, Brinell	48	48
Tensile Strength, Ultimate	185 MPa	26800 psi
Tensile Strength, Yield	90.0 MPa @Strain 0.5 %	13100 psi @Strain 0.5 %
Elongation at Break	10 %	10 %	in 50 mm
Reduction of Area	8.0 %	8.0 %
Modulus of Elasticity	72.4 GPa	10500 ksi
Compressive Strength	76.0 MPa	11000 psi	at permanent set of 0.1%
	160 MPa	23200 psi	at permanent set of 10%
Machinability	80 %	80 %	UNS C36000 (free-cutting brass) = 100%
Izod Impact	7.00 J	5.16 ft-lb

Electrical Properties	Metric	English	Comments
Electrical Resistivity	0.000019156 ohm-cm @Temperature 20.0 °C	0.000019156 ohm-cm @Temperature 68.0 °F
Magnetic Permeability	1.0	1.0

Thermal Properties	Metric	English	Comments
Specific Heat Capacity	0.376 J/g-°C	0.0899 BTU/lb-°F
Thermal Conductivity	62.7 W/m-K @Temperature 20.0 °C	435 BTU-in/hr-ft²-°F @Temperature 68.0 °F
Melting Point	315 °C	599 °F	Incipient
	900 - 925 °C	1650 - 1700 °F
Solidus	900 °C	1650 °F
Liquidus	925 °C	1700 °F
Shrinkage	1.1 %	1.1 %	Patternmaker's Shrinkage (1/8 in./ft.)

Component Elements Properties	Metric	English	Comments
Antimony, Sb	<= 0.70 %	<= 0.70 %
Copper, Cu	68.5 - 73.5 %	68.5 - 73.5 %
Iron, Fe	<= 0.15 %	<= 0.15 %
Lead, Pb	22 - 25 %	22 - 25 %
Nickel, Ni	<= 0.70 %	<= 0.70 %
Phosphorus, P	<= 0.050 %	<= 0.050 %
Sulfur, S	<= 0.080 %	<= 0.080 %
Tin, Sn	4.5 - 6.0 %	4.5 - 6.0 %
Zinc, Zn	<= 0.50 %	<= 0.50 %

References for this datasheet.

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MC94300b1 / 11955

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