Leaded Semi-Red Brass (Valve Metal), UNS C84400, Copper Casting Alloy

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Leaded Semi-Red Brass (Valve Metal), UNS C84400, Copper Casting Alloy
Categories:	Metal; Nonferrous Metal; Copper Alloy; Brass; Copper Casting Alloy
Material Notes:	Casting methods recommended for this alloy: Centrifugal, Continuous, and Sand. Applications: General hardware, ornamental castings. plumbing supplies and fixtures, low-pressure valves and fittings. Classified under: Semi-red brasses and leaded semi-red brasses. ASTM B584; formerly ASTM B145-5A As cast values below are for sand casting. Alloy does not respond to heat treating. Casting shrinkage allowance is 2%
Key Words:	81-3-7-9, CDA 844, ASTM B30 (CA844), ASTM B271, ASTM B505, ASTM B584; ASTM B145-5A
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Physical Properties	Original Value	Comments

Density	8.70 g/cc

Mechanical Properties	Original Value	Comments
Hardness, Brinell	55
Tensile Strength, Ultimate	235 MPa
Tensile Strength, Yield	105 MPa @Strain 0.5 %
Elongation at Break	26 %	In 50 mm
Modulus of Elasticity	90.0 GPa
Machinability	90 %	UNS C36000 (free-cutting brass) = 100%
Izod Impact	11.0 J

Electrical Properties	Original Value	Comments
Electrical Resistivity	0.000010513 ohm-cm @Temperature 20.0 °C	16.4% IACS
Magnetic Permeability	1.0

Thermal Properties	Original Value	Comments
CTE, linear	18.0 µm/m-°C @Temperature 20.0 - 260 °C
Specific Heat Capacity	0.380 J/g-°C
Thermal Conductivity	72.5 W/m-K @Temperature 20.0 °C
Melting Point	840 - 1005 °C
Solidus	840 °C
Liquidus	1005 °C
Shrinkage	1.56 %	Patternmaker's Shrinkage (3/16 in./ft.)

Component Elements Properties	Original Value	Comments
Aluminum, Al	<= 0.0050 %
Antimony, Sb	<= 0.25 %
Copper, Cu	78 - 82 %
Iron, Fe	<= 0.40 %
Lead, Pb	6.0 - 8.0 %
Nickel, Ni	<= 1.0 %
Phosphorus, P	<= 0.020 %
Silicon, Si	<= 0.0050 %
Sulfur, S	<= 0.080 %
Tin, Sn	2.3 - 3.5 %
Zinc, Zn	7.0 - 10 %

References for this datasheet.

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MC84400b1 / 11904

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