Nickel Gear Bronze, UNS C91700, Centrifugal or Permanent Mold Cast

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Nickel Gear Bronze, UNS C91700, Centrifugal or Permanent Mold Cast
Categories:	Metal; Nonferrous Metal; Copper Alloy; Copper Casting Alloy
Material Notes:	Casting methods recommended for this alloy: Centrifugal, Continuous, Permanent Mold, and Sand. Applications: Worm gears, steel mill nuts Classified under: Tin bronze
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Physical Properties	Metric	English	Comments

Density	8.75 g/cc	0.316 lb/in³

Mechanical Properties	Metric	English	Comments
Hardness, Brinell	106	106
Tensile Strength, Ultimate	415 MPa	60200 psi
Tensile Strength, Yield	220 MPa	31900 psi
Elongation at Break	16 %	16 %	in 50 mm
Modulus of Elasticity	105 GPa	15200 ksi
Machinability	20 %	20 %	UNS C36000 (free-cutting brass) = 100%

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	16.2 µm/m-°C @Temperature 20.0 - 200 °C	9.00 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	850 - 1015 °C	1560 - 1859 °F
Solidus	850 °C	1560 °F
Liquidus	1015 °C	1859 °F
Shrinkage	1.6 %	1.6 %	Patternmaker's Shrinkage (3/16 in./ft.)

Component Elements Properties	Metric	English	Comments
Copper, Cu	85 - 87.5 %	85 - 87.5 %
Lead, Pb	<= 0.25 %	<= 0.25 %
Nickel, Ni	1.3 - 2.0 %	1.3 - 2.0 %
Phosphorus, P	<= 0.30 %	<= 0.30 %
Tin, Sn	11.3 - 12.5 %	11.3 - 12.5 %

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MC91700b2 / 108957

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