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    Tensile Test Methods for Plastics: ASTM D638 - Specs

    Type I

    ASTM D638 Specimen Dimensions

    Full length,l3

    165

    Parallel length,l2

    57

    Gauge length,l1

    50

    Parallel section width,strong1

    13

    Thickness,h

    7 mm or less
    ( Recommend 3.2±0.4 mm )

    Grip section width,strong2

    19

    Distance between grips

    115

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    Type II

    ASTM D638 Specimen Dimensions

    Full length,l3

    185

    Parallel length,l2

    57

    Gauge length,l1

    50

    Parallel section width,strong1

    6

    Thickness,h

    7 mm or less
    ( Recommend 3.2±0.4 mm )

    Grip section width,strong2

    19

    Distance between grips

    135

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    Type III

    ASTM D638 Specimen Dimensions

    Full length,l3

    165

    Parallel length,l2

    57

    Gauge length,l1

    50

    Parallel section width,strong1

    19

    Thickness,h

    7mm to 14mm

    Grip section width,strong2

    29

    Distance between grips

    115

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    Type V

    ASTM D638 Specimen Dimensions

    Parallel length,l2

    63.5

    Parallel section width,strong1

    7.62

    Thickness,h

    4mm or less

    Grip section width,strong2

    9.53

    Distance between grips

    25.4

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    • Five types of specimens
    • Type I is recommended
    • Type II is used if break does not occur within the parallel section of Type I
    • Type V is used for special circumstances, such as testing in a thermostatic chamber
      (In addition, other shapes are specified, such as tube and rod shapes.)

    Type IV

    ASTM D638 Specimen Dimensions

    Full length,l3

    115

    Parallel length,l2

    33

    Gauge length,l1

    25

    Parallel section width,strong1

    6

    Thickness,h

    4mm or less

    Grip section width,strong2

    19

    Distance between grips

    65

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