Copper Nickel Alloy 90-10

  • Copper Nickel Alloy 90-10

  • General Characteristics

    A copper-nickel alloy with an alpha-phase structure. Small amounts of iron and manganese are added to improve corrosion resistance in high-velocity (from 1 to about 3.5 m/s) waters, including seawater. The alloy is relatively insensitive to stress corrosion. It has good cold- and hot- working properties and is readily weldable.  The most commonly used wrought forms are plate, sheet and tube. Typical applications include tubes & tubeplates for light-duty condensers, feedwater heaters and evaporators, power stations & multi-core cabled tubes for hydraulic and pneumatic lines.

  • Typical Chemical Composition

    Weight % Fe Pb Mn Ni Zn Other Cu
    Minimum 1.00 — — 9.00 — — Bal.
    Maximum 1.80 0.050 1.00 11.00 1.00 0.50

  • Physical Properties

    Characteristics English Metric
    Nominal density 20°C   /   68°F 0.323 lbs/in3 8.94 g/cm3
    Melting range 2010-2100 °F 1100-1150 °C
    Specific heat capacity 0.0908 BTU/lb- °F 380 J/KG- °C
    Thermal

    conductivity

    		 Typical 20°C   /   68°F 23.1 BTU/ft-hr-°F 40 W/m-K
    Mill Annealed 100°C /  212°F 34.4 BTU/ft-hr-°F 59.5 W/m-K
    200°C /  392°F 40.6 BTU/ft-hr-°F 70.2 W/m-K
    300°C /  572°F 45.4 BTU/ft-hr-°F 78.5 W/m-K
    400°C /  752°F 47.9 BTU/ft-hr-°F 82.8 W/m-K
    500°C /  932°F 48.6 BTU/ft-hr-°F 84.0 W/m-K
    600°C / 1112°F 49.9 BTU/ft-hr-°F 86.3 W/m-K
    700°C / 1292°F 50.1 BTU/ft-hr-°F 86.6 W/m-K
    Average coefficient of

    thermal expansion

    From 20°C to temperature

    		 300°C /  572°F 9.5 micro in/in- °F 17.1 micro m/m- °K
    Electrical  resistivity 20°C   /   68°F 53.9 nΩ×m

  • Mechanical Properties

    Temper Tensile Hardness
    1 mm (0.04 in thick) Ultimate Yield Elongation

    At break

    		 Rockwell B
    KSI MPa KSI MPa %
    OS050 –

    Avg’ Grain Size 0.05mm

    		 51 350 13 90 35 25
    OS035 –

    Avg’ Grain Size 0.035mm

    		 52 358 14 98 35 27
    OS025 –

    Avg’ Grain Size 0.025mm

    		 53 365 16 110 35 30
    H01 – ¼ Hard 60 415 49 338 20 58
    H02 – ½ Hard 68 468 63 435 8 75
    H04 – Hard 75 518 72 500 5 80
    H06 – Extra Hard 78 540 76 525 4 82
    H08 – Spring 82 565 79 545 3 84
    H10 – Extra Spring 85 585 79 545 3 86

  • Specifications

    • ASME – SB171, SB402
    • ASTM – B122, B171, B402, B432
    • Military Specifications – MIL-C15726 E(2)
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