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    ASTM

    ASTM C749 : 13

    Standard Test Method for Tensile Stress-Strain of Carbon and Graphite

    Standard Details

    1.1 This test method covers the testing of carbon and graphite in tension to obtain the tensile stress-strain behavior, to failure, from which the ultimate strength, the strain to failure, and the elastic moduli may be calculated as may be required for engineering applications. Table 2 lists suggested sizes of specimens that can be used in the tests.

    TABLE 1 List of Materials Shown in Fig. 2

    Assembly

    Item

    Quantity

    Name, Description, Material

    1A

    101

    2

    Crosshead attachment yoke—1 dia x 4 long—416 or 440 S.S.

    1/2 in. A grips B,C

    102

    2

    Chain—3/16  dia, 700 pound tensile limit, 10 links long—Carbon Steel

     

    103

    4

    Chain journal—9/16 dia x 1/2 long—416 or 440 S.S.D

     

    104

    4

    Pin—3/16 dia x 1—Std Dowel

     

    105

    2

    Grip attachment yoke—1 dia x 25/8 long—416 or 440 S.S.D

     

    106

    2

    Pin—1/4 shank dia with 1/2 dia x 3/4 long knurled head, total length
     21/2 , taper first half inch at 10°—416 or 440 S.S.D

     

    107

    2

    Grip sleeve—11/2  dia x 25/16 long—416 or 440 S.S.D

     

    108

    2

    Split sleeve—1 dia x 1 long—416 or 440 S.S.D

     

    109

    1

    Specimen—0.510 dia x 43/4 long—Carbon

     

    110

     

    Not Used

    1B

    . . .

    2

    Item 101—Crosshead attachment yoke

    3/4 in. A grips

    . . .

    2

    Item 102—Chain

     

    . . .

    4

    Item 103—Chain journal

     

    . . .

    4

    Item 104—Pin

     

    . . .

    2

    Item 105—Grip attachment yoke

     

    . . .

    2

    Item 106—Pin

     

    111

    2

    Grip sleeve—11/2 dia x 25/16 long—416 or 440 S.S.D

     

    112

    2

    Split sleeve—1 dia x 1 long—416 or 440 S.S.D

     

    113

    1

    Specimen—0.760 dia x 43/4 long—Carbon

     

    114

     

    Not Used

    1C

    115

    2

    Crosshead attachment yoke—11/2 dia x 4 long—416 or 440 S.S.D

    11/4 in. A grips

    116

    2

    Chain—3/8 dia, 5100 pound tensile limit, 10 links long—Carbon Steel

     

    117

    4

    Chain journal—5/8 dia x 5/8 long—416 or 440 S.S.D

     

    118

    4

    Pin—3/8 dia x 11/2 long—Std Dowel

     

    119

    2

    Grip attachment yoke—11/2 dia x 25/8 long—416 or 440 S.S.D

     

    120

    2

    Pin—1/2 shank dia with 3/4 dia x 3/4 long knurled head, total length
     41/4 , taper first half inch at 10°—416 or 440 S.S.D

     

    121

    2

    Grip sleeve—17/8 dia x 35/8 long—416 or 440 S.S.D

     

    122

    2

    Split sleeve—11/2 dia x 21/4 long—416 or 440 S.S.D

     

    123

    1

    Specimen—11/4 dia x 93/4 long—Carbon

     

    124

     

    Not Used

    1D

    . . .

    2

    Item 115—Crosshead attachment yoke

    2 in. A grips

    . . .

    2

    Item 116—Chain

     

    . . .

    4

    Item 117—Chain journal

     

    . . .

    4

    Item 118—Pin

     

    125

    2

    Grip attachment yoke—21/4 dia x 25/8 long—416 or 440 S.S.D

     

    126

    2

    Pin—1/2 shank dia with 3/4 dia x 3/4 long knurled head, total length
     41/4 , taper first half inch at 10°—416 or 440 S.S.D

     

    127

    2

    Grip sleeve—23/4 dia x 51/2 long—416 or 440 S.S.D

     

    128

    2

    Split sleeve—21/4 dia x 4 long—416 or 440 S.S.D

     

    129

    1

    Specimen—2.000 dia x 143/8 long—Carbon

     

    130

     

    Not Used

    A 1 in. is equal to 25.4 mm.
    B Preload chain to yield using a load time recording.
    C Commercially available.
    D Or alternative high strength stainless steel.
    TABLE 2 Sample Sizes Used in Round-Robin Tests (Suggested Specimen Size)A

    MaterialB

    Max Grain Size, in.

    Sample, in.

    Specimen
    Size, in.

    Recommended
    Shank and
    Maximum Gauge,
    in.

    AXM-50

    0.001

    5 by 5 by 5, molded

    1/2 by 0.200C

    1/2 by 3/16 

     

     

     

     

    3/4 by 1/4 

    9326

    0.001

    20 by 10 by 2, molded

    1/2 by 1/4 

     

     

     

     

    3/4 by 0.3

     

     

     

     

    1/2 by 3/16 C

     

     

     

     

     

    1/2 by 3/16 

     

     

     

     

    3/4 by 1/4 

    9326A

    0.001

    20 by 10 by 2, molded

    1/2 by 1/4 

    1/2 by 3/16 

     

     

     

    3/4 by 3/8 

     

     

     

     

    3/4 by 0.3

    3/4 by 0.3

     

     

     

    3/4 by 3/8 

     

     ATJ

    0.006

    13, rounds, molded

    1/2 by 1/4 

    1/2 by 1/4 

     

     

     

    3/4 by 3/8 

    3/4 by 1/4 

     

     

     

    3/4 by 3/8 

    3/4 by 1/4 

     

     

     

    3/4 by 3/8 

     

    HLM

    0.033

    molded, 10 by 18 by 25

    1/2 by 1/4 

    3/4 by 3/8 

     

     

     

    3/4 by 3/8 

     

     

     

     

    3/4 by 3/8 

     

     

     

     

    3/4 by 3/8 

    Status : Historical
    Standard Type: Main
    Document No: ASTM C749 : 13
    Document Year: 2013
    Pages: 12
    • Section Volume:
    • 05.05 Volume 05.05 Petroleum Products, Liquid Fuels, and Lubricants (V): D7756–latest; Combustion Characteristics; Manufactured Carbon and Graphite Products
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