ASTM D2583 Standard Test Method for Indentation Hardness of Rigid Plastics by Means of a Barcol Impressor

ASTM D2583, test method involves measuring the indentation hardness of both reinforced and nonreinforced rigid plastics by using a Barcol Impressor. The Barcol Impressor is commonly used to evaluate the hardness of fabricated components and individual test specimens for the sake of production control because it is portable.


Introduction ASTM D2583

ASTM D2583 is used to determine the indention hardness of rigid plastics by means of the barcol impressor. A Barcol Impressor is used to determine the surface hardness of a material. A comparison of the hardness of the material is drawn by  using the relative depth of penetration of the Impressor’s indentor. The Barcol Impressors Model Nos. 934-1 and 935 are used for plastics. Model No. 935 is used to measure softer materials within the range of hardness assessed by these Impressors, whereas the Model No. 934-1 is used to measure harder materials.

ASTM D2583 Test Procedure 

Specimen SelectionIt is important to choose representative specimens that accurately reflect the material being evaluated. The representative samples of the rigid plastic materials should be in the form of flat sheets or blocks with sufficient thickness to accommodate the Barcol impressor indentation.
Test Setup and ExecutionThe test setup involves preparing the necessary equipment, sample preparation, sample conditioning, calibration, selecting a suitable test area, indentation, reading, repeat testing, calculating the average Barcol Hardness Number (BHN). The specimen is kept under the indenter of the Barcol hardness tester and a uniform amount of pressure is applied to get maximum dial indication in the tester. Depth of penetration is recorded and converted into absolute Barcol numbers by the testing instrument.

ASTM D2583 Test Specimens 

Specimen DetailsThe specimen selection process involves selecting the material, obtaining representative samples, conditioning them in a controlled environment, determining the appropriate sample size, ensuring clean surfaces, random selection, unique identification, and documentation.
Specimen dimensionsThe specimen should have a minimum thickness of 0.25 inches (6.35 mm) and a minimum width and length of 2 inches (50.8 mm). 

ASTM D2583 Test Results 

The results obtained from ASTM D2583 provide valuable information about the Barcol Hardness Number (BHN), a dimensionless value representing the material’s resistance to indentation, and a qualitative assessment. The test also provides a correlation between BHN values and qualitative hardness levels for specific types of rigid plastics. Comparative analysis can be used to assess relative hardness differences and identify variations impacting performance.

Tests Related to ASTM D2583 Test Important relevant tests to ASTM D2583 include ASTM D638 for tensile properties of plastics, ASTM D790 for flexural properties of Unreinforced and Reinforced Plastics , ASTM D256 for impact resistance of plastics, ASTM D648 for measuring deflection temperature of plastics.


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The required number of samples or specimens should comply with the procedure given in the astm d2583 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 d2583 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.

Where can I get the astm d2583 tested?

You can share your astm d2583 testing requirements with MaTestLab. MaTestLab has a vast network of material testing laboratories, spread across the USA and Canada. We support your all material testing needs ranging from specific astm d2583 test to various testing techniques.

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