Tin Bronze, UNS C90700, Sand castings

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Tin Bronze, UNS C90700, Sand castings
Categories:	Metal; Nonferrous Metal; Copper Alloy; Bronze; Copper Casting Alloy
Material Notes:	Casting methods recommended for this alloy: Centrifugal, Continuous, Investment, Permanent Mold, and Sand. Applications: Gears, bearing bushings.
Key Words:	Gear Bronze
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Physical Properties	Metric	English	Comments

Density	8.77 g/cc	0.317 lb/in³

Mechanical Properties	Metric	English	Comments
Hardness, Brinell	80	80
Tensile Strength, Ultimate	305 MPa	44200 psi
Tensile Strength, Yield	150 MPa	21800 psi
Elongation at Break	20 %	20 %
Modulus of Elasticity	105 GPa	15200 ksi
Fatigue Strength	170 MPa @# of Cycles 1.00e+8	24700 psi @# of Cycles 1.00e+8	rotating beam, casting method not reported
Machinability	20 %	20 %	UNS C36000 (free-cutting brass) = 100%

Electrical Properties	Metric	English	Comments
Electrical Resistivity	0.0000150 ohm-cm	0.0000150 ohm-cm
Magnetic Permeability	1.0	1.0

Thermal Properties	Metric	English	Comments
CTE, linear	18.0 µm/m-°C @Temperature 20.0 - 200 °C	10.0 µin/in-°F @Temperature 68.0 - 392 °F
Specific Heat Capacity	0.376 J/g-°C	0.0899 BTU/lb-°F
Thermal Conductivity	71.0 W/m-K @Temperature 20.0 °C	493 BTU-in/hr-ft²-°F @Temperature 68.0 °F
Melting Point	832 - 1000 °C	1530 - 1830 °F
Solidus	832 °C	1530 °F
Liquidus	1000 °C	1830 °F

Component Elements Properties	Metric	English	Comments
Aluminum, Al	<= 0.0050 %	<= 0.0050 %
Copper, Cu	88 - 90 %	88 - 90 %
Iron, Fe	<= 0.15 %	<= 0.15 %
Lead, Pb	<= 0.30 %	<= 0.30 %
Phosphorus, P	0.10 - 0.30 %	0.10 - 0.30 %
Tin, Sn	10 - 12 %	10 - 12 %
Zinc, Zn	<= 0.50 %	<= 0.50 %

References for this datasheet.

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MC90700b1 / 11929

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