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  • C510 Bronze (CuSn5)
  • C519 Phosphor Bronze 6% (CuSn6)
  • C521 Bronze (CuSn8)
  • C651 Silicon Bronze (CuSi1)
  • C70250 High Performance Alloy (CuNi3Si1)
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  • 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 Ω⋅cmil/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