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ASTM C 749 : 2013

ASTM C 749 : 2013

Superseded

Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

View Superseded by
superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

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

Available format(s)

Hardcopy , PDF

Superseded date

11-11-2014

Language(s)

English

Published date

01-10-2013

Publisher

American Society for Testing and Materials

1.1This 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.

1/2in. A grips B,C

102

2

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

103

4

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

104

4

Pin—3/16dia x 1—Std Dowel

105

2

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

106

2

Pin—1/4shank dia with 1/2dia x 3/4long 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 25/16long—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 43/4long—Carbon

110

Not Used

1B

. . .

2

Item 101—Crosshead attachment yoke

3/4in. 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—11/2dia x 25/16long—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 43/4long—Carbon

114

Not Used

1C

115

2

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

11/4in. A grips

116

2

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

117

4

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

118

4

Pin—3/8dia x 11/2long—Std Dowel

119

2

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

120

2

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

121

2

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

122

2

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

123

1

Specimen—11/4dia x 93/4long—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—21/4dia x 25/8long—416 or 440 S.S.D

126

2

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

127

2

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

128

2

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

129

1

Specimen—2.000 dia x 143/8long—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

1/2by 0.200C

1/2by 3/16

3/4by 1/4

9326

0.001

20 by 10 by 2, molded

1/2by 1/4

3/4by 0.3

1/2by 3/16C

1/2by 3/16

3/4by 1/4

9326A

0.001

20 by 10 by 2, molded

1/2by 1/4

1/2by 3/16

3/4by 3/8

3/4by 0.3

3/4by 0.3

3/4by 3/8

 ATJ

0.006

13, rounds, molded

1/2by 1/4

1/2by 1/4

3/4by 3/8

3/4by 1/4

3/4by 3/8

3/4by 1/4

3/4by 3/8

HLM

0.033

molded, 10 by 18 by 25

1/2by 1/4

3/4by 3/8

3/4by 3/8

3/4by 3/8

3/4by 3/8

 CS

0.030

10, rounds, extruded

2 by 1

3/4by 3/8

3/4by 3/8

1/2by 1/4

1/2by 1/4

AGR

0.250

25, rounds, extruded

2 by 1

2 by 1

2 by 1

11/4by 5/8

2 by 1

11/4by 5/8

CGE

0.265

14, rounds, extruded

2 by 11/4

 3/4by 1/2

2 by 1

Graphitar

. . .

carbon-graphite, resin impregnated

3/4by 1/4

3/4by 1/4

Grade 86

 1/2by 1/4C

1/2by 0.2

 1/2by 1/4

Purebon P-59

. . .

carbon-graphite, copper treated

3/4by 1/4

3/4by 1/4

1/2by 1/4C

1/2by 3/16

1/2by 1/4

A Based on Research Report RR:C05-1000 (see Section 11).
B Identity of suppliers available from ASTM International Headquarters.
C Gas-bearings.
Note 1—The results of about 400 tests, on file at ASTM as a research report, show the ranges of materials that have been tested, the ranges of specimen configurations, and the agreement between the testers. See Section 11.
Note 2—For safety considerations, it is recommended that the chains be surrounded by suitable members so that at failure all parts of the load train behave predictably and do not constitute a hazard for the operator.

1.2The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. Conversions are not provided in the tables and figures.

1.3This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

Committee
D 02
DocumentType
Test Method
Pages
12
PublisherName
American Society for Testing and Materials
Status
Superseded
SupersededBy
Supersedes

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