Leaded Semi-Red Brass, UNS C84800, Copper Casting Alloy

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Leaded Semi-Red Brass, UNS C84800, Copper Casting Alloy
Categories:	Metal; Nonferrous Metal; Copper Alloy; Copper Casting Alloy
Material Notes:	Casting methods recommended for this alloy: Centrifugal and Sand. Applications: Plumbing fixtures, cocks, faucets, stops, waste air and gas fittings, low pressure valves fittings. Classified under: Semi-red brasses and leaded semi-red brasses. ASTM B584; formerly ASTM B145-5B As cast values below are for sand casting. Alloy does not respond to heat treating. Casting shrinkage allowance is 1.4%
Key Words:	Leaded semi-red brass, plumbing goods brass, 76-2.5-6.5-15, CA 848, ASTM B30, ASTM B271, ASTM B505, ASTM B584; ASTM B145-5B, FED QQ-C-390, Ingot code no. 130
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Physical Properties	Original Value	Comments

Density	8.58 g/cc

Mechanical Properties	Original Value	Comments
Hardness, Brinell	55
Tensile Strength, Ultimate	255 MPa
Tensile Strength, Yield	97.0 MPa @Strain 0.5 %
Elongation at Break	35 %	In 50 mm
Creep Strength	20.0 MPa @Temperature 288 °C	for 0.00001%/h
	55.0 MPa @Temperature 204 °C	for 0.00001%/h
	82.0 MPa @Temperature 177 °C	for 0.00001%/h
Modulus of Elasticity	105 GPa
Compressive Strength	88.3 MPa	at permanent set of 0.1%
	109 MPa	at permanent set of 1%
	236 MPa	at permanent set of 10%
Fatigue Strength	76.0 MPa @# of Cycles 1.00e+8
Machinability	90 %	UNS C36000 (free-cutting brass) = 100%
Charpy Impact	16.0 J	V-notch

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	18.7 µm/m-°C @Temperature 20.0 - 260 °C
Specific Heat Capacity	0.376 J/g-°C
Thermal Conductivity	72.0 W/m-K @Temperature 20.0 °C
Melting Point	832 - 955 °C
Solidus	832 °C
Liquidus	954 °C
Shrinkage	1.6 %	Patternmaker's Shrinkage (3/16 in./ft.)

Component Elements Properties	Original Value	Comments
Aluminum, Al	<= 0.0050 %
Antimony, Sb	<= 0.25 %
Copper, Cu	75 - 77 %
Iron, Fe	<= 0.40 %
Lead, Pb	5.5 - 7.0 %
Nickel, Ni	<= 1.0 %
Phosphorus, P	<= 0.020 %
Silicon, Si	<= 0.0050 %
Sulfur, S	<= 0.080 %
Tin, Sn	2.0 - 3.0 %
Zinc, Zn	13 - 17 %

References for this datasheet.

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MC84800b1 / 11906

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