Silicon Brass UNS C87400, Copper Casting Alloy

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Silicon Brass UNS C87400, Copper Casting Alloy
Categories:	Metal; Nonferrous Metal; Copper Alloy; Copper Casting Alloy
Material Notes:	Casting methods recommended for this alloy: Centrifugal, Die, Investment, Permanent Mold, Plaster, and Sand. Applications: Bearings, gears, impellers, rocker arms, valve stems, clamps. Classified under: Silicon bronzes and silicon brasses. ASTM B584; formerly ASTM B198-13A As cast values below are for sand casting. Alloy does not respond to heat treating
Key Words:	Silicon Brass, ASTM B584; ASTM B198-13A
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Physical Properties	Metric	English	Comments

Density	8.50 g/cc	0.307 lb/in³	Estimated

Mechanical Properties	Metric	English	Comments
Hardness, Brinell	70	70	500 kg
	100	100	3000 kg
Tensile Strength, Ultimate	379 MPa	55000 psi	as cast
Tensile Strength, Yield	165 MPa	23900 psi	as cast
Elongation at Break	30 %	30 %	as cast
Tensile Modulus	106 GPa	15400 ksi
Machinability	50 %	50 %	UNS C36000 (free-cutting brass) = 100%

Electrical Properties	Metric	English	Comments
Electrical Resistivity	0.0000260 ohm-cm	0.0000260 ohm-cm	6.7% IACS

Thermal Properties	Metric	English	Comments
CTE, linear	19.6 µm/m-°C @Temperature 20.0 - 300 °C	10.9 µin/in-°F @Temperature 68.0 - 572 °F
Specific Heat Capacity	0.377 J/g-°C	0.0900 BTU/lb-°F
Thermal Conductivity	2.31 W/m-K	16.0 BTU-in/hr-ft²-°F
Melting Point	821 - 916 °C	1510 - 1680 °F
Solidus	821 °C	1510 °F
Liquidus	916 °C	1680 °F

Component Elements Properties	Metric	English	Comments
Copper, Cu	83 %	83 %
Silicon, Si	3.0 %	3.0 %
Zinc, Zn	14 %	14 %

References for this datasheet.

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MC87400b1 / 11920

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