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C64780 Wrought BRONZES Copper-Silicon Alloys (Silicon Bronzes and Silicon Brasses) true true https://api.copper.org/alloys.xhtml/C64780
Chemical Composition
Elements
Cu(1,2) Pb Sn Zn Ni Cr Mg Mn Si Ti Zr
(1) Cu + Sum of Named Elements 99.5% min.
(2) Cu value includes Ag.
Min (%) 90.0 0.10 0.20 1.0 0.01 0.20
Max (%) 0.02 2.0 2.5 3.5 0.01 0.01 1.0 0.9 0.01 0.01
Mechanical Properties *
Form Temper Temper Code Tensile Strength
(ksi)		 YS-0.2% Offset
(ksi)		 Elongation
(%)		 Vickers Hardness, 500 gm Fatigue Strength**
(ksi)		 Proportional Limit
(ksi)		 Section Size
(in)
* Measured at room temperature, 68°F (20°C). ** Fatigue Strength: 100 x 106 cycles, unless indicated as [N] x 106.
Flat Products 1/2 Hard H02 74 Typ
 65 Typ
 15 Typ
 160 Typ
 62 Typ
Extra Hard H06 103 Typ
 94 Typ
 14 Typ
 225 Typ
 38 Typ 77 Typ 0.009
Extra Spring H10 123 Typ
 113 Typ
 11 Typ
 255 Typ
 41 Typ 88 Typ
Hard H04 86 Typ
 78 Typ
 10 Typ
 185 Typ
 35 Typ 70 Typ
Physical Properties
Melting Point - Liquidus°F 1989
Melting Point - Solidus°F 1954
Densitylb/cu in. at 68°F 0.321
Specific Gravity 8.9
Electrical Conductivity% IACS at 68°F 48
Thermal ConductivityBtu/ sq ft/ ft hr/ °F at 68°F 116.2
Specific Heat CapacityBtu/ lb /°F at 68°F 0.095
Modulus of Elasticity in Tensionksi 11600
Modulus of Rigidityksi 4400
Fabrication Properties
Technique Suitability
Soldering Excellent
Brazing Good
Gas Shielded Arc Welding Good
Spot Weld Good
Capacity for Being Cold Worked Good
Capacity for Being Hot Formed Good
Machinability Rating 20
Common Fabrication Processes

No fabrication process properties for this alloy

Thermal Properties
Treatment Minimum* Maximum*
* Temperature is measured in Fahrenheit.
Annealing 842
Hot Working Temperature 1382 1832
Stress Relief 482
Typical Uses

No information for this alloy

Applicable Specifications

No applicable specifications for this alloy

Corrosion Properties

No Corrosion Properties Available.