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 (N/mm²) Mill Limits
Min Max
Annealed  O61 260 380 .0254 - 3.264 mm
1/4 Hard H01 415 515
1/2 Hard H02 515 655
Hard H04 620 760
Spring H08 690 0

Square Wire

Temper Name  Temper Code  Tensile Strength (N/mm²) Mill Limits 
Min Max
Annealed  O61 260 380 .2540 - 1.905 mm
1/4 Hard H01 415 515
1/2 Hard H02 515 655
Hard H04 620 760
Spring H08 690 0

Rolled Flat

Temper Name  Temper Code  Tensile Strength (N/mm²) Mill Limits 
Min Max
Annealed  O61 275 345

Thickness:
.2540 - 1.905 mm

Width:
.3810 - 6.350 mm

1/4 Hard H01 290 360
1/2 Hard H02 325 395
Hard H04 415 485
Extra Hard H06 460 525
Spring H08 490 545

Physical Properties

Melting Point (Liquidis) 1060°C
Melting Point (Solidus) 1032°C
Density 8.74696 gm/cu cm
Electrical Resistivity (Annealed) 14.3634 ?? -cm @ 20°C
Electrical Conductivity (Annealed) 0.07025 MegaSiemens /cm @ 20°C
Thermal Conductivity (Solutionized-Aged) 57.14210526 W/m · °K @ 20°C
Coefficient of Thermal Expansion 0.00001782°C (20-300°C)
Modulus of Elasticity (Tension) 117200 MPa
Modulus of Rigidity 44100 MPa

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