ASTM International - ASTM C749-13
Standard Test Method for Tensile Stress-Strain of Carbon and Graphite
Organization: | ASTM International |
Publication Date: | 1 October 2013 |
Status: | inactive |
Page Count: | 12 |
ICS Code (Chemical elements): | 71.060.10 |
significance And Use:
5.1 The round robin testing on which the precision and bias for this test method have been determined employed a range of graphites (see Table 2) whose grain sizes were of the order of 1 mil to... View More
scope:
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 2
5/8 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 | |
107 | 2 | Grip sleeve-1
1/2 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 4
3/4 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-1
1/2 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 4
3/4 long-Carbon | |
114 | Not Used | ||
1C | 115 | 2 | Crosshead attachment yoke-1
1/2 dia x 4 long-416 or 440 S.S.D |
1
1/4 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-1
1/2 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 | |
121 | 2 | Grip sleeve-1
7/8 dia x 35/8 long-416 or 440 S.S.D | |
122 | 2 | Split sleeve-1
1/2 dia x 21/4 long-416 or 440 S.S.D | |
123 | 1 | Specimen-1
1/4 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-2
1/4 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 | |
127 | 2 | Grip sleeve-2
3/4 dia x 51/2 long-416 or 440 S.S.D | |
128 | 2 | Split sleeve-2
1/4 dia x 4 long-416 or 440 S.S.D | |
129 | 1 | Specimen-2.000 dia x 14
3/8 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
Material
B | 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 | ||||
CS | 0.030 | 10, rounds, extruded | 2 by 1 | |
3/4 by 3/8 |
3/4 by 3/8 | |||
1/2 by 1/4 | ||||
1/2 by 1/4 | ||||
AGR | 0.250 | 25, rounds, extruded | 2 by 1 | 2 by 1 |
2 by 1 | 1
1/4 by 5/8 | |||
2 by 1 | ||||
1
1/4 by 5/8 | ||||
CGE | 0.265 | 14, rounds, extruded | 2 by 1
1/4 | |
3/4 by 1/2 | 2 by 1 | |||
Graphitar | . . . | carbon-graphite, resin impregnated |
3/4 by 1/4 |
3/4 by 1/4 |
Grade 86 |
1/2 by 1/4 C |
1/2 by 0.2 | ||
1/2 by 1/4 | ||||
Purebon P-59 | . . . | carbon-graphite, copper treated |
3/4 by 1/4 |
3/4 by 1/4 |
1/2 by 1/4 C |
1/2 by 3/16 | |||
1/2 by 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.
1.2 The 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.
1.3 This 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.
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