C651 Silicon Bronze Alloy Wire (CuSi1)

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Alloy C651 is a corrosion resistant copper alloy. It is primarily used as a welding rod and for mechnical fasteners and electrical connections.

Mechanical Properties

Round Wire

Temper Name  Temper Code  Tensile Strength (ksi) Mill Limits 
Min Max
Annealed  O61 38 55 .0010 - .1285 inch
1/4 Hard H01 60 75
1/2 Hard H02 75 95
Hard H04 90 110
Spring H08 100  

Square Wire

Temper Name  Temper Code  Tensile Strength (ksi) Mill Limits 
Min Max
Annealed O61  38 55 .0100 - .0808 inch
1/4 Hard H01 60 75
1/2 Hard H02 75 95
Hard H04 90 110
Spring H08 100  

Rolled Flat

Temper Name  Temper Code  Tensile Strength (ksi) Mill Limits 
Min Max
Annealed  O61 40 50

Thickness:
.0100 - .0500 inch

Width:
.0150 - .2500 inch

1/4 Hard H01 42 52
1/2 Hard H02 47 57
Hard H04 60 70
Extra Hard H06 67 76
Spring H08 71 79

Physical Properties

Melting Point (Liquidis) 1940°F
Melting Point (Solidus) 1890°F
Density 0.316 lbs/cu in
Electrical Resistivity (Annealed) 86.4 ?(cir mil/ft) @ 68°F
Electrical Conductivity (Annealed) 12 % IACS @ 68°F
Thermal Conductivity (Solutionized-Aged) 33 Btu ft/sq ft hr °F @ 68°F
Coefficient of Thermal Expansion 0.0000099°F (68-572°F)
Modulus of Elasticity (Tension) 17000 ksi
Modulus of Rigidity 6400 ksi