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C87700 Silicon Bronze Silicon Bronze Cast BRASSES Copper-Silicon Alloys (Silicon Bronzes and Silicon Brasses) true true https://api.copper.org/alloys.xhtml/C87700
Chemical Composition
Elements
Cu(1) Pb Sn Zn Fe P Ni Mn Sb Si
(1) Cu + Sum of Named Elements 99.2% min.
Min (%) 87.5 7.0 2.5
Max (%) 0.09 2.0 9.0 0.50 0.15 0.25 0.8 0.10 3.5
Mechanical Properties *
Form Temper Temper Code Tensile Strength
(ksi)		 YS-0.2% Offset
(ksi)		 Elongation
(%)		 Brinell Hardness, 3000 kg load
* Measured at room temperature, 68°F (20°C).
As Continuous Cast As Continuous Cast M07 29.0 Min
43.5 Typ
58 Max
 11.6 Min
17.4 Typ
23.2 Max		 3.6 Typ
 11.6 Typ
Forgings As Hot Forged - Air Cooled M10 29 Min
43.5 Typ
58 Max
 11.6 Min
17.4 Typ
23.2 Max		 3.6 Typ
 11.6 Typ
Physical Properties
Melting Point - Liquidus°F 1796
Melting Point - Solidus°F 1652
Densitylb/cu in. at 68°F 0.311
Specific Gravity 8.5
Casting Characteristics

No casting characteristics for this alloy

Fabrication Properties
Technique Suitability
Soldering Fair
Brazing Fair
Oxyacetylene Welding Good
Gas Shielded Arc Welding Good
Coated Metal Arc Welding Fair
Spot Weld Good
Seam Weld Good
Butt Weld Good
Capacity for Being Cold Worked Fair
Capacity for Being Hot Formed Good
Forgeability Rating 80
Machinability Rating 70
Common Fabrication Processes

No fabrication process properties for this alloy

Thermal Properties

No thermal properties for this alloy

Typical Uses

No information for this alloy

Applicable Specifications
Form Specific Sub-Form Application System Standard Description
As Continuous Cast ASTM B505/B505M COPPER BASE ALLOY CONTINUOUS CASTINGS
Die Forging ASTM B283/B283M COPPER AND COPPER ALLOY DIE FORGINGS (HOT PRESSED)
Ingot ASTM B30 COPPER BASE ALLOYS IN INGOT FORM
Rod, Bar & Shapes Forgings ASTM B124/B124M COPPER AND COPPER-ALLOY FORGING ROD, BAR AND SHAPES
Corrosion Properties

No Corrosion Properties Available.