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    助焊筆RMA615

    助焊筆RMA615
    概述參數

    GENERAL DESCRIPTION

     Alpha 615 flux meets MIL-F-14256 requirements for flux type RMA, making it suitable for all Military work requiring conformance to DOD-STD-2000.  Alpha 615 also meets the IPC-SF-818 standard for type LR3NC, the lowest flux residue corrositivity category and the highest surface insulation resistance rating.

     The standard solids content for 615 is 37%.  Where use of a lower solids flux is appropriate, such as when wave soldering surface mount boards, 615-25 (25% solids) and 615-15 (15% solids) are available.

     

    FEATURES & BENEFITS

        ·      Maximum achievable RMA activity.  Very fast wetting flux.

    ·      Very cleanable, even with high preheat.  No white residue.

    ·      Excellent foaming properties.  Uniform, consistent flux coverage.


     ACTIVITY

     Alpha 615 is the most effective soldering flux yet developed for achieving excellent soldering yields with complex Military assemblies, while clearly passing all requirements for an RMA, non-conductive, non-corrosive flux.

     Wetting balance and solder spread tests are widely used quantitative measures for comparing flux activity.  The faster the speed of solder wetting, as measured by the wetting balance, and the greater the area of solder spread, i.e. spread factor percent, the more efficient the flux is for promoting solder wetting.  The superior activity of 615 can be seen from the following test data:

     


    Alpha

    615

    Kester

    185

    Almit RF35M

    Spread   Factor1

    91.7%

    90.2%

    86.8%

    Wetting   Speed2

    0.41   seconds

    0.47   seconds

    0.64   seconds

     

    1 Test conducted using oxidized copper and 60Sn/40Pb
       flowed at 500
    °F  for 15 seconds.

    2 Test conducted using oxidized copper, 60Sn/40Pb at 500°F,

       5 mm immersion depth and 10 second cycle time. Wetting
       speed measured as time for wetting to reach equilibrium.

     Alpha 615 has also demonstrated the ability to prevent solder icicle formation, when tested according to the method developed by Philips-Eindhoven, Netherlands, “Determination of the Flux Efficiency to Prevent Formation of Icicles (and Bridges).”


    USE

     Alpha 615 is designed for wave soldering printed circuit assemblies that must use an RMA flux meeting military specifications.  While formulated to have excellent foaming properties, wave and spray fluxing can also be used.

     

    All three solids levels of 615 flux should be maintained by periodic measurement of flux specific gravity (corrected to 77°F) and kept to within +0.015 and -0.005 of the nominal values.

     

    While topside preheat temperatures of 180-200°F are sufficient for 615 flux activation, higher preheat conditions may be required for assemblies that have significant heat sinking characteristics, or when attempting to minimize the temperature gradient that ceramic chip components see between preheat and the solder wave.

     

    Under conditions of extreme preheat, most RMA fluxes become extremely difficult to clean after soldering, especially with mild fluorocarbon-blend solvents.  Alpha 615 flux residues clean very well with either mild fluorocarbon-blend solvents or aqueous saponifier (Alpha 2110).

     

    PACKAGING

     Alpha 615 series fluxes are available in 1, 5 and 55 gallon containers.

     

    HEALTH & SAFETY

     Alpha 615 is flammable.  Keep away from heat, sparks and open flames.  Observe standard precautions for handling and use, such as in well-ventilated areas and avoidance of prolonged or repeated contact with skin.

     

    TECHNICAL SPECIFICATIONS

     

    Physical Properties

    Typical   Values


    615

    615-25

    615-15

    Appearance


    Clear, amber liquid


    Specific Gravity @ 77°F   ±   .005

    .0878

    0.845

    0.818

    Solids Content, % wt/wt

    37

    25

    15

    Water Extract Resistivity,   ohm-cm,

    per MIL-F-14256, typical

    17,000

    190,000

    225,000

    Chlorides and Bromides, per   MIL-F-14256

    (Silver Chromate Paper)

     

     

    Pass

     

     

    Pass

     

     

    Pass

    Copper Mirror, per MIL-F-14256

    Pass

    Pass

    Pass

    Corrosion, per IPC-SF-818

    No Corrosion

    No

     Corrosion

    No Corrosion

    Surface Insulation Resistance:




    35°C/90%   RH, comb-down, uncleaned, per Bellcore TR-TSY-000078


    > 1.0 x 1011 ohms


    85°C/85%   RH, comb-down, uncleaned, per IPC-SF-818, Class 3


    >1.0 x 109 ohms


    Flash Point (T.C.C.)


    53°F


    Recommended Alpha Thinner


    438




    相關產品:

    Alpha無鉛錫條| Alpha錫膏| Alpha錫絲| Alpha錫片| Alpha助焊劑| OM338| OM340
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