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National Bronze & Metals, Inc. National Bronze & Metals, Inc.
   LEADING USA MANUFACTURER & MASTER DISTRIBUTOR OF BRASS, BRONZE & COPPER ALLOYS
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  • C18200 Chromium Copper  
    RWMA CLASS II

    Used in resistance welding machine electrodes, seam welding wheels, electrical switch gear, electrode holder jaws, cable connectors, current carrying arms and shafts, circuit breaker parts, arcing and bridging parts, grid side rods in electron tubes, molds, spot welding tips, flash welding electrodes, electrical and thermal conductors requiring greater strength than copper, switch contacts

    TYPICAL USES FOR C18200 CHROMIUM COPPER

    • CONSUMER: Pencil-type & Light Soldering Guns: Tips, Rod Extensions
    • ELECTRICAL: Switch Contacts, Electric Motor and Generator Components, Contacts, Wire, High Temperature, Semi Conductor Bases, Parts for Electronic Devices, Cable, Connectors, Thermal Conductors Requiring Greater Strength than Copper, Switch Gears, Electrical Connectors, Electrical Conductors Requiring Greater Strength than Copper, Arcing and Bridging Parts, Circuit Breaker Parts, Electron Tube Grid Side Rods
    • INDUSTRIAL: Seam Welding Wheels, Electrode Holder Jaws, Flash Welding Electrodes, Plastic Mold Components, Resistance Welding Machine Electrodes, Flash Welding Electrodes, Current Carrying Shafts and Arms, Wear Plates on Heavy Equipment, Heat Sinks, Structural Parts, Spot Welding Tips, Molds
     
    <<< SEE SIZES & SPECS BELOW >>



      
    CHEMICAL COMPOSITION


    Cr Cu Fe Pb Si
    Min/Max 0.6 - 1.2 Rem 0.1 0.05 0.1
    Nominals 0.9000 99.1000 - - -
    TEMPER

    Product Type Temper Type
    Bar MILITARY MIL-C-19311
    Forgins MILITARY MIL-C-19311
    Rod MILITARY MIL-C-19311
    Strip MILITARY MIL-C-19311
    Wire, Soft ASTM F9
    MECHANICAL PROPERTIES

    Temper Sect. Size Cold Work Type Min Temp Tensile Strength YS
    0.05% UL
    YS
    0.02% Offset
    YS
    0.005% Offset
    Elong. RH
    B
    RH
    C
    RH
    F
    RH
    30T
    VH
    500
    BH
    500
    BH
    3000
    Shear
    Strgth
    Fatigue
    Strgth
    Izod
    Impact
    Strgth
    - in. % - F ksi ksi ksi ksi % B C F 30T 500 500 3000 ksi ksi ft-lb
    - mm. - - C MPa MPa MPa MPa - - - - - - - - MPa MPa J
    FLAT PRODUCTS
    TF00 0.04 68 51 36 - - - - - - - - - - - -
    TF00 1 0 TYP 20 352 248 - - 22 59 - - - - - - - - 0
    TB00 0.04 68 34 19 - - - - - - - - - - - -
    TB00 1 0 TYP 20 234 131 - - 40 16 - - - - - - - - 0
    TD00 0.04 68 53 51 - - - - - - - - - - - -
    TD00 1 50 TYP 20 365 352 - - 6 66 - - - - - - - - 0
    TH01 0.04 68 67 59 - - - - - - - - - - - -
    TH01 1 50 TYP 20 462 407 - - 14 79 - - - - - - - - 0
    PLATE
    TF00 2.99 68 56 40 - - - - - - - - - - - -
    TF00 76 0 TYP 20 386 276 - - 30 68 - - - - - - - - 0
    TF00 2.01 68 58 42 - - - - - - - - - - - -
    TF00 51 0 TYP 20 400 290 - - 25 70 - - - - - - - - 0
    ROD
    TF00 2.99 68 65 55 - - - - - - - - - - - -
    TF00 76 0 TYP 20 448 379 - - 18 70 - - - - - - - - 0
    TD04 0.5 68 57 56 - - - - - - - - - - - -
    TD04 12.7 60 TYP 20 393 386 - - 11 65 - - - - - - - - 0
    TH10 0.16 68 86 77 - - - - - - - - - - - -
    TH10 3.96 90 TYP 20 593 531 - - 14 - - - - - - - - - 0
    TF00 1 68 72 65 - - - - - - - - - - - -
    TF00 25.4 0 TYP 20 496 448 - - 18 80 - - - - - - - - 0
    TF00 4.02 68 55 43 - - - - - - - - - - - -
    TF00 102 0 TYP 20 379 296 - - 25 68 - - - - - - - - 0
    TF00 2.01 68 70 65 - - - - - - - - - - - -
    TF00 51 0 TYP 20 483 448 - - 18 75 - - - - - - - - 0
    TF00 0.5 68 70 55 - - - - - - - - - - - -
    TF00 12.7 0 TYP 20 483 379 - - 21 70 - - - - - - - - 0
    TH04 0.5 68 77 65 - - - - - - - - - - - -
    TH04 12.7 60 TYP 20 531 448 - - 16 82 - - - - - - - - 0
    TB00 0.5 68 45 14 - - - - - - - - - - - -
    TB00 12.7 0 TYP 20 310 97 - - 40 - - - - - - - - - 0
    TD10 0.16 68 74 73 - - - - - - - - - - - -
    TD10 3.96 91 TYP 20 510 503 - - 5 - - - - - - - - - 0
    TUBE
    TD04 0.21 68 59 57 - - - - - - - - - - - -
    TD04 5.4 76 TYP 20 407 393 - - 21 67 - - - - - - - - 0
    O61 0.09 68 40 15 - - - - - - - - - - - -
    O61 2.4 0 TYP 20 276 103 - - 50 - - 59 - - - - - - 0
    TL03 0.21 68 69 63 - - - - - - - - - - - -
    TL03 5.4 76 TYP 20 476 434 - - 26 84 - - - - - - - - 0
    PHYSICAL PROPERTIES

    Product Property US Customary Metric
    Coefficient of Thermal Expansion 9.8 ∙ 10 6ֿ per ˚F (68-212 F) 17.6 ∙ 10 6ֿ per ˚C (20-300 C)
    Density 0.321 lb/in3 @ 68 F 8.89 gm/cm3 @ 20 C
    Electrical Conductivity 80 %IACS @ 68 F 0.468 MegaSiemens/cm @ 20 C
    Electrical Resistivity 13.0 ohms-cmil/ft @ 68 F 2.16 microhm-cm @ 20 C
    Melting Point Liquid US 1967 F 1075 C
    Melting Point Solid US 1958 F 1070 C
    Modulas of Elasticity in Tension 17000 ksi 117000 MPa
    Modulas of Rigidity 7200 ksi 49640 MPa
    Specific Gravity 8.89 8.89
    Specific Heat Capacity 0.092 Btu/lb/˚F @ 68 F 385.5 J/kg ∙ ˚K at 293 K
    Thermal Conductivity 187.0 Btu ∙ ft/(hr ∙ ft2 ∙˚F) @ 68 F 323.6 W/m ∙ ˚K at 20 C
    FABRICATION

    Joining Technique Suitability
    Brazing Good
    Butt Weld Fair
    Capacity for Being Cold Worked Excellent
    Capacity for Being Hot Formed Good
    Coated Metal Arc Welding Not Recommended
    Forgeability Rating 80
    Gas Sheilded Arc Welding Good
    Machinability rating 20
    Oxyacetylene Welding Not Recommended
    Seam Weld Not Recommended
    Soldering Good
    Spot Weld Not Recommended
    SPECIFICATIONS

    End Product Specification
    Bar MILITARY MIL-C-19311
    Forgins MILITARY MIL-C-19311
    Rod MILITARY MIL-C-19311
    Strip MILITARY MIL-C-19311
    Wire, Soft ASTM F9
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    Lorain, OH

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