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C87850 Copper Silicon Alloy Cast BRASSES Copper-Silicon Alloys (Silicon Bronzes and Silicon Brasses) true true https://api.copper.org/alloys.xhtml/C87850
Chemical Composition
Elements
Cu(1) Pb Sn Zn Fe P Ni(2) Mn Sb Si
(1) Cu + Sum of Named Elements 99.5% min.
(2) Ni value includes Co.
Min (%) 74.0 0.05 2.7
Max (%) 78.0 0.09 0.30 Rem 0.10 0.20 0.20 0.10 0.10 3.4
Mechanical Properties *
Form Temper Temper Code Tensile Strength
(ksi)		 YS-0.2% Offset
(ksi)		 YS-0.5% Ext
(ksi)		 Elongation
(%)		 Rockwell B scale Brinell Hardness, 500 kg load
* Measured at room temperature, 68°F (20°C).
As Continuous Cast As Continuous Cast M07 65 Min
 25 Min
 8 Min
 103 Min
As Permanent Mold Cast As Permanent Mold Cast M05 32 Min
34 Typ
 16 Min
21 Typ
 70 Min
74 Typ
As Sand Cast As Sand Cast M01 59 Min
63 Typ
 22 Min
26 Typ
 16 Min
25 Typ
 78 Typ
Physical Properties
Melting Point - Liquidus°F 1616
Melting Point - Solidus°F 1571
Densitylb/cu in. at 68°F 0.3
Electrical Conductivity% IACS at 68°F 8
Thermal ConductivityBtu/ sq ft/ ft hr/ °F at 68°F 21.8
Coefficient of Thermal Expansion 68-21210 to -6 power per °F (68 – 212°F) 10.3
Coefficient of Thermal Expansion 68-39210 to -6 power per °F (68 – 392°F) 10.3
Coefficient of Thermal Expansion 68-57210 to -6 power per °F (68 – 572°F) 10.4
Specific Heat CapacityBtu/ lb /°F at 68°F 0.09
Modulus of Elasticity in Tensionksi 15200
Casting Characteristics
Casting Attribute Level
Casting Yield Medium
Drossing Low
Effect of Section Size Medium
Fluidity High
Gassing Low
Patternmakers Shrinkage inches per inch 3/16
Shrinkage in Solidification Medium
Fabrication Properties
Technique Suitability
Soldering Excellent
Brazing Excellent
Oxyacetylene Welding Good
Spot Weld Good
Seam Weld Good
Butt Weld Good
Capacity for Being Cold Worked Poor
Capacity for Being Hot Formed Excellent
Machinability Rating 70
Common Fabrication Processes

No fabrication process properties for this alloy

Thermal Properties
Treatment Minimum* Maximum* Value* Time**
* Temperature is measured in Fahrenheit. ** Time is measured in minutes.
Stress Relief 0
Solution Treatment 0
Annealing 932 1112
Typical uses
Product Category Product Reason Category Reason
Industrial Valve Bodies for Water
Marine Marine Products
Plumbing Faucets
Plumbing Fittings
Water Meter Cases
Applicable Specifications
Form Specific Sub-Form Application System Standard Description
As Continuous Cast ASTM B505/B505M COPPER BASE ALLOY CONTINUOUS CASTINGS
As Permanent Mold Cast ASTM B806 PERMANENT MOLD CASTINGS
As Sand Cast ASTM B584 COPPER ALLOY SAND CASTINGS FOR GENERAL APPLICATIONS
Ingot ASTM B30 COPPER BASE ALLOYS IN INGOT FORM
Corrosion Properties

No Corrosion Properties Available.