Leaded High-Strength Yellow Brass, UNS C86700, Copper Casting Alloy

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Leaded High-Strength Yellow Brass, UNS C86700, 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 strength free-machining manganese bronze. Valve stems. Classified under: Manganese and leaded manganese bronze alloys. ASTM B584; formerly ASTM B132-B Data typical for as-sand-cast separately cast test bar (M01 temper). Alloy does not respond to heat treating
Key Words:	Leaded Manganese Bronze, ASTM B584; ASTM B132-B
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Physical Properties	Original Value	Comments

Density	8.32 g/cc

Mechanical Properties	Original Value	Comments
Hardness, Brinell	155	3000 kg
Hardness, Rockwell B	80
Tensile Strength, Ultimate	585 MPa
Tensile Strength, Yield	290 MPa @Strain 0.5 %
Elongation at Break	20 %	in 50 mm
Modulus of Elasticity	105 GPa
Machinability	55 %	UNS C36000 (free-cutting brass) = 100%

Electrical Properties	Original Value	Comments
Electrical Resistivity	0.000005387 ohm-cm @Temperature 20.0 °C

Thermal Properties	Original Value	Comments
CTE, linear	19.0 µm/m-°C @Temperature 20.0 - 200 °C
Specific Heat Capacity	0.376 J/g-°C
Thermal Conductivity	17.0 BTU-in/hr-ft²-°F
Melting Point	860 - 880 °C
Solidus	862 °C
Liquidus	880 °C
Shrinkage	2.1 %	Patternmaker's Shrinkage (1/4 in./ft.)

Processing Properties	Original Value	Comments
Annealing Temperature	260 °C	Stress-Relieving Temperature

Component Elements Properties	Original Value	Comments
Aluminum, Al	1.0 - 3.0 %
Copper, Cu	55 - 60 %
Iron, Fe	1.0 - 3.0 %
Lead, Pb	0.50 - 1.5 %
Manganese, Mn	1.0 - 3.5 %
Nickel, Ni	<= 1.0 %
Tin, Sn	<= 1.5 %
Zinc, Zn	30 - 38 %

References for this datasheet.

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MC86700b1 / 11917

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