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  • C17300

    C17300 free cutting beryllium bronze has good processability, high thermal conductivity, weldability, corrosion resistance, polishing, abrasion resistance, adhesion resistance, can be forged into parts of various shapes, and its strength and wear resistance are better than chromium Zirconium copper alloys have better physical properties and are used in medium-strength and highly conductive parts, such as fuse fasteners, springs, connectors, resistance spot welding heads, seam welding rolls, die casting machine heads, plastic molding dies, and probes. Pins, coaxial connectors, photomultiplier tubes, high-precision instruments, military aerospace, etc.

      The performance of C17300 high-strength beryllium bronze is equivalent to C17200. However, C17300 contains 0.2% -0.6% lead, which makes the alloy's cutting coefficient increased from 20% to 50% (100% for free-cutting brass), thereby greatly improving the machining performance of the alloy and better adaptability. Precision requirements for precision parts.
    C17300 Beryllium Cobalt Copper has good processability, high thermal conductivity, weldability, corrosion resistance, polishing, abrasion resistance, adhesion resistance, can be forged into parts of various shapes, and its strength and wear resistance are better than chromium Zirconium copper alloys have better physical properties and are used in medium-strength and highly conductive parts, such as fuse fasteners, springs, connectors, resistance spot welding heads, seam welding rolls, die casting machine heads, plastic molding dies, and probes. Pins, coaxial connectors, photomultiplier tubes, high-precision instruments, military aerospace, etc.
      When used as an insert in a plastic mold, C17300 free cutting beryllium bronze can effectively reduce the temperature in the heat concentration zone, simplify or eliminate the design of the cooling channel. The excellent thermal conductivity of beryllium-cobalt copper is about 3-4 times better than that of the mold steel. This feature can ensure that plastic products cool quickly and uniformly, reduce product deformation, unclear shape details, and similar defects, which can be significant in most cases. To shorten the production cycle of the product. Therefore beryllium cobalt copper can be widely used:
    1. Moulds, cores, inserts that require fast and uniform cooling, especially high thermal conductivity, corrosion resistance and good polishing requirements;
    2. Converging cavity of nozzle and hot runner system in injection molding; molds, mold cores and inserts in corners of TV casings in injection molds;
    3. The pinch-off part of the blow mold, the insert of the ring and the handle.


    C17300 Chemical composition w/% Implementation standards
    Be Co+Ni

    Pb

    Cu Si Fe Al
    1.8-2.0 ≥0.2 0.2-0.6 margin 0.15 0.15 0.15 ASTM

    C17300 Analysis of mechanical properties and electrical conductivity
    Status Tensile Strength/MPa Yield Strength0.2%,/MPa Rockwell hardness/B Elongation/4*DA Least% Conductivity/%IACS
    A(TB00) Solution heat treated state 410-590 140 B 45-85 20
    H(TD04) Hard state Less than 10mm in diameter 620-900 520 B 88-103 8 >17
    diameter 10-25mm 620-860 B 88-102
    diameter25-75mm 590-830 B 88-101
    Rockwell hardness/C Elongation/4*DB Least%
    AT(TF00) Precipitation heat treatment 1140-1380 1000 C 36-42 4
    HT(TH04) Hard and precipitation heat treatment 1240-1580 1070 C 38-44 2 >22

    Available status
    Brush name ASTM name Description
    A TB00 Solution annealing state (quenched state)
    ¼H TD01 Quarter hard
    ½H TD02 Half hard (semi-hard)
    ¾H TD03 Three quarters hard state
    H TD04 Hard state (full hard)
    AT TF00 Standard aging heat treatment in quenched state
    ¼HT TH01 Quarter hard standard heat treatment
    ½HT TH02 1/2 hard standard aging heat treatment
    ¾HT TH03 Three-quarter hard aging heat treatment
    HT TH04 Standard aging heat treatment in hard state (process of comprehensive strengthening of deformation and aging)
    Note: In the Brush name:
    "A" stands for solid solution annealing (annealed, the alloy is in the softest state, and it is easy to be stamped and formed, and needs to be processed in the next cold process or directly strengthened during the expiration period);
    "H" stands for cold working state(hard);
    "T" indicates that the material has been subjected to aging hardening by standard heat treatment (heat treatment indicates that the aging strengthening heat treatment has been performed).

    Product application field

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