ASTM E290 is a standard test method used to determine the bending property of materials for ductility. This test method is performed under four conditions of constraints on the bend position such as a guided-bend test, a semi-guided bend test, a free-bend test, and a bend-and-flatten test.
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Introduction to ASTM E290
ASTM E290 is a test method designed to carry out bend tests for the ductility of materials. After applying four conditions of constraints on different positions of specimens, the bend is tested for evidence of surface irregularities. Any irregularity within one thickness of the edge of the specimen is not considered a bend test failure.
ASTM E290 is quite significant in terms of determining the quality of materials. It is basically performed to measure how much a sample is resistant to cracking or other surface irregularities.
ASTM E290 Test Procedure
Specimen selection
The specimen is selected by the testing procedures of either a full cross-section specimen or full thickness specimen.
Test setup and execution
Bend tests are made with respect to two relevant dimensions such as a longitudinal test required to be performed when the longitudinal dimensions of a test are aligned with the processing dimensions. Similarly, Transverse tests require to be performed when long dimensions become perpendicular to the processing dimensions.
ASTM E290 Specimens
Specimen details
ASTM E290 specimens are generally metals and are usually rectangular, round, and strip shaped.
Specimen dimensions
The general sample size for ASTM E290 varies depending on the required material to be tested.
Specimen preparation
The specimen is positioned on pins, rollers, shoulders, or flat surfaces with suitable end radii at both ends for support. A force is then applied using a plunger, pin, mandrel, or male die at the midpoint between the two supports to create the desired bend.
ASTM E290 Results
The test is completed when the designated angle of bend, or other specified condition, has been reached. The specific acceptance criteria or performance standards may vary depending on the industry, material, and intended application; however, the material’s ductility, flexibility, and overall performance can be assessed. SI units are always considered to be regarded as standard units for the expression of results.
Tests Related to ASTM E290
ASTM E190 is a test method utilized to assess the strength and ductility of sheet materials through tension tests conducted using a round punch. It is specifically designed for materials that are too thin to undergo testing using conventional tension testing methods. ASTM E190 offers an approach to evaluate the ductility of thin sheet materials.
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How many samples are required for astm e290?
The required number of samples or specimens should comply with the procedure given in the astm e290 standard. However, the MaTestLab operations team can assist you for your special requirements once you share your testing details with us.
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The turnaround time for astm e290 test methodology depends upon the test procedure mentioned in the standard test document. However, we at MaTestLab understand your research requirements and hence try to get your test completed within the least possible time.
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