Scope
1.1 These test methods cover the tension testing of metallic materials in any form at room temperature, specifically, the methods of determination of yield strength, yield point elongation, tensile strength, elongation, and reduction of area.
1.2 The gage lengths for most round specimens are required to be 4D for E8 and 5D for E8M. The gage length is the most significant difference between E8 and E8M Test Specimens Test specimens made from powder metallurgy (P/M) materials are exempt from this requirement by industry-wide agreement to keep the pressing of the material to a specific projected area and density.
- According to ASTM E8/E8M-16a Standard Test Methods for Tension Testing of Metallic Materials (latest version), the number of specimen is not specified, but in appendix X.I, it is said that 6 specimen were tested for each type of materials.
- Specimens for ASTM D638 are dumbbell-shaped with either a 25 mm or 50 mm gauge length; a 50 mm gauge length is recommended. Gauge length changes with ASTM E83 Class B-2 accuracy; an absolute accuracy of 10 μm for a 50 mm gauge length and relative accuracy within ±0.5% are required by ASTM D638 for measuring the tensile.
1.3 Exceptions to the provisions of these test methods may need to be made in individual specifications or test methods for a particular material. For examples, see Test Methods and Definitions A370 and Test Methods B557, and B557M.
1.4 Room temperature shall be considered to be 10 to 38°C [50 to 100°F] unless otherwise specified.
Parallel section of the test specimen. The specimens were fabricated with an abrasive waterjet cutter from sheet material. Figure 1: ASTM E8 2 rectangular tension test specimen used for uniaxial testing (nominal dimensions in mm). Mechanical testing equipment Figure 2 shows the testing machine and the location of DIC cameras and lighting.
1.5 The values stated in SI units are to be regarded as separate from inch/pound units. The values stated in each system are not exact equivalents; therefore each system must be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.
1.6 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.
Notes
Claudia's Notes:
Corrections for the 2011 Edition include revisions to Note 10 and Note 11 in Figure 1 and editorial changes for Table 1 and Figure 16.
Corrections for the 2011 Edition include revisions to Note 10 and Note 11 in Figure 1 and editorial changes for Table 1 and Figure 16.
Significance and Use
Tension tests provide information on the strength and ductility of materials under uniaxial tensile stresses. This information may be useful in comparisons of materials, alloy development, quality control, and design under certain circumstances.
Pokemon diamond portugues. The results of tension tests of specimens machined to standardized dimensions from selected portions of a part or material may not totally represent the strength and ductility properties of the entire end product or its in-service behavior in different environments.
These test methods are considered satisfactory for acceptance testing of commercial shipments. The test methods have been used extensively in the trade for this purpose.
Keywords
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What is ASTM E8 and E8M Tensile Testing?
Astm E8 Tensile Specimen Dimensions Guide
ASTM E8 and E8M testing methods describes the tensile testing of metallic materials in various forms. Specifically, the test determines the yield strength, yield point elongation, tensile strength, elongation and reduction of area. The information gathered by tensile tests are crucial in the comparison of materials, alloy creation and designing processes. Furthermore, the standardization of testing methods are widely accepted and used for testing of commercial materials. It’s important to note that the only difference between E8 and E8M testing is the gage lengths of round specimen but the actual testing is identical.
Equipment Required
Tensile Tester – Capacity of Tensile Tester depends on the size and the ultimate tensile strength of the specimen. Speak to one of our sales engineers for possible accommodations. Frank Bacon Machinery has over 250 tensile testers in stock in various makes, models and capacities
Extensometer Cat c27 part manual. Free gamehouse full version crack. – Extensometer should have gage lengths equal to or shorter than the length of the reduced section of the specimen. It should also have enough travel to accommodate the elongation of the sample.
Grips – Wedge Grips are most commonly used however various types of grips may be used depending on the sample type.
Testing Software – We recommend MTESTQuattro software for all your tensile testing needs.
ASTM E8 & E8M Procedure
• Size the specimen according to ASTM E8/E8M specifications. Specimens can be either round, flat, wire, pipe or tube. This can be performed using a Tensilkut, Mill, Lathe or Die.
• Gage punch the sample for both round and flat specimen. Select the correct guage length based on the specimen size you will be testing. This will give you the initial length for calculating elongation.
• Measure the width and thickness for flat specimens and the diameter of round specimens. This will allow you or the software to calculate the cross section area required to calculate the stress value.
• Place the specimen into the tensile tester. Flat or Vee wedge grips, threaded holder or shouldered button head holders are the most common ways of holding the specimens. Place the extensometer on the specimen. The extensometer will allow the software to automatically calculate the .02% offset yield.
• Start the test by applying the load to the specimen. The typical loading rate for ASTM E8/E8M is .2 inches/min. Once the specimen has yielded, stop the machine and remove the extensometer. Pathloss 5 keygen. With a fully computer controlled tensile tester the software will stop the machine and tell the operator to remove the extensometer. Once the extensometer has been removed, continue the test until the specimen fractures. The test can be resumed with a faster rate of load to minimize the test time.
• Once the test specimen fails, remove the specimen and put the pieces together to measure the final distance between gage marks. This will be used for the calculation of percent elongation.
• Put together a test report with the Yield Strength (.02% offset), Tensile Strength and Elongation results (Y, T & E). A stress vs. strain graph or load vs displacement graph could also be added to the test report.
• The test is now completed! If you are looking to get started with ASTM E8/E8M testing in house please contact a sales engineer ([email protected]) at Frank Bacon Machinery to discuss your specific testing requirements. Civilization vi mac free download. If you are looking to outsource your testing please contact [email protected] to get pricing and information on testing services. Huawei software installing stuck at 90.