Nickel Tin Bronze, UNS C94700, Copper Casting Alloy

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Nickel Tin Bronze, UNS C94700, Copper Casting Alloy
Categories:	Metal; Nonferrous Metal; Copper Alloy; Copper Casting Alloy
Material Notes:	Casting methods recommended for this alloy: Centrifugal, Continuous, Investment, Permanent Mold, and Sand. Applications: Valve stems and bodies, bearings, wear guides, shift forks, feeding mechanisms, circuit breaker parts, gears, piston cylinders, nozzles. Classified under: Nickel-tin bronzes. ASTM B584; formerly ASTM B292-A As cast values below are for sand casting
Key Words:	Nickel tin bronze, ASTM B584; ASTM B292-A
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Physical Properties	Metric	English	Comments

Density	8.84 g/cc	0.319 lb/in³	Estimated

Mechanical Properties	Metric	English	Comments
Hardness, Brinell	85	85	500 kg
	180	180	3000 kg
Tensile Strength, Ultimate	345 MPa	50000 psi	as cast
	586 MPa	85000 psi	heat treated
Tensile Strength, Yield	159 MPa	23100 psi	as cast
	414 MPa	60000 psi	heat treated
Elongation at Break	10 %	10 %	heat treated
	35 %	35 %	as cast
Tensile Modulus	103 GPa	15000 ksi
Machinability	20 %	20 %	heat treated; UNS C36000 (free-cutting brass) = 100%
	30 %	30 %	as cast; UNS C36000 (free-cutting brass) = 100%

Electrical Properties	Metric	English	Comments
Electrical Resistivity	0.0000140 ohm-cm	0.0000140 ohm-cm	12% IACS

Thermal Properties	Metric	English	Comments
CTE, linear	19.6 µm/m-°C @Temperature 20.0 - 200 °C	10.9 µin/in-°F @Temperature 68.0 - 392 °F
Specific Heat Capacity	0.377 J/g-°C	0.0900 BTU/lb-°F
Thermal Conductivity	4.50 W/m-K	31.2 BTU-in/hr-ft²-°F
Melting Point	904 - 1030 °C	1660 - 1880 °F
Solidus	904 °C	1660 °F
Liquidus	1030 °C	1880 °F

Processing Properties	Metric	English	Comments
Precipitation Temperature	304 °C @Time 299 sec	580 °F @Time 0.0830 hour	Air

Component Elements Properties	Metric	English	Comments
Copper, Cu	88 %	88 %
Nickel, Ni	5.0 %	5.0 %
Tin, Sn	5.0 %	5.0 %
Zinc, Zn	2.0 %	2.0 %

References for this datasheet.

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MC94700b1 / 11958

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