Beryllium Copper Alloy C17300

  • Beryllium Copper Alloy C17300

  • General Characteristics

    C17300 Combines superior machinability with the good fabrication characteristics of C17200. This alloy is manufactured to provide a combination of high strength and hardness properties coupled with superior thermal properties. This range of properties makes C17300 the premier material for copper alloy molds and a wide range of other applications from oil and gas to aerospace.

  • Typical Chemical Composition

    Weight % Be Ni+Co Ni+Co+Fe Pb Cu Other
    minimum 1.80 0.20 — 0.20 Bal —
    maximum 2.00 — 0.60 0.60 0.5

  • Physical Properties

    Characteristics English Metric
    Nominal density

    (68°F/20°C)

    		 0.298 lbs/in3 8.25 g/cm3
    Specific heat

    (212 °F/100°C)

    		 0.10 BTU/lb – °F 420 J/KG- °K
    Melting range 1590-1800 °F 865-980 °C
    Coefficient of thermal

    expansion

    		 68°F – 212°F

    20°C – 100°C

    		 9.3 micro in/in- °F 16.7 micro m/m- °K
    68°F – 392°F

    20°C – 200°C

    		 9.4 micro in/in- °F 17.0 micro m/m- °K
    68°F – 572°F

    20°C – 300°C

    		 9.9 micro in/in- °F 17.8 micro m/m- °K
    Thermal conductivity 20°C   /   68°F 60-75 BTU/ft- hr – °F 105-130 W/m – °K
    200°C / 392°F 75-77 BTU/ft- hr – °F 130-133 W/m – °K
    Electrical resistivity 20°C   /   68°F 57-115 nΩ ∙ m
    Electrical conductivity Volumetric:

    20°C   /   68°F

    		 15-30% IACS

  • Mechanical Properties

    Temper Tensile Hardness Electrical Conductivity
    Ultimate Yield Elongation

    in 50 mm

    (2 in.)

    		 Rockwell B %IACS
    KSI MPa KSI MPa % %IACS
    TB00 – Solution Heat Treated All Sizes 60-

    85

    		 415-

    585

    		 20-

    30

    		 140-

    205

    		 35-60 45-85 17-19
    TD04 – Solution Heat Treated and Cold Worked: Hard (H) <9.5 mm (3/8 in.) 95-

    130

    		 655-

    900

    		 75-

    105

    		 515-

    725

    		 10-20 92-103 15-17
    9.5-25 mm

    ( 3/8-1 in.)

    		 90-

    120

    		 620-

    825

    		 75-

    105

    		 515-

    725

    		 10-20 91-102 15-17
    >25 mm

    (1 in.)

    		 85-

    115

    		 585-

    790

    		 75-

    105

    		 515-

    725

    		 10-20 88-102 15-17
    TF00 – Precipitation Hardened (AT) Aged

    3 h at 330 °C

    		 All Sizes 165-190 1140-1310 145-

    175

    		 1000-1210 3-10 36-40 HRC 22-25
    TH04 – Hard and Precipitation Heat Treated (HT)

    Aged 2 to 3 h at

    330 °C

    		 <9.5 mm (3/8 in.) 185-215 1280-1480 165-

    200

    		 1140-1380 2-5 39-45 HRC 22-25
    9.5-25 mm

    ( 3/8-1 in.)

    		 180-210 1240-1450 165-

    200

    		 1140-1380 2-5 38-44 HRC 22-25
    >25 mm

    (1 in.)

    		 175-205 1210-1410 150-

    194

    		 1030-1340 2-5 37-43 HRC 22-25
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