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ASTM D785
The Rockwell hardness of plastics and electrical insulating components can be determined accurately using the standard test method ASTM D785. This method gauges a material’s resistance to indentation under stress, providing critical information on its strength and performance.
🔑 Key Takeaways:
Employs a Rockwell tester calibrated to SI units.
Plastic materials described using method D785 are usually performed on a Durometer D2240.
📌 Intended Purpose:
Determining the hardness of plastics.
Resistance to indentation testing.
Inspection of plastic materials.
Measuring the hardness of various types of plastics.
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Specifications for ASTM D785
Examine an extensive table of material properties containing physical, mechanical, electrical, and thermal characteristics for comprehensive analysis. This aids in the informed selection and evaluation of materials.
| Category | Property | Metric | Imperial | Notes |
|---|---|---|---|---|
| General | Scope | Indentation hardness of plastics | Indentation hardness of plastics | Related to electrical insulating materials as well |
| Test Procedure | Specimen Placement | N/A | N/A | Placed on Rockwell Hardness tester |
| Minor Load | N/A | N/A | Applied, gauge set to zero | |
| Major Load | N/A | N/A | Applied for 15 seconds, then removed | |
| Recovery Time | 15 seconds | 15 seconds | Specimen recovers before reading | |
| Specimen | Thickness | 6.4 mm | 0.25 in | Molded or cut from sheet |
| Measurement | Scales | R, L, M, E, K | R, L, M, E, K | Higher number = harder material; R & M common for plastics |
| Units | N/A | N/A | Hardness numbers are unitless | |
| Significance | Indication | N/A | N/A | Indicates indentation hardness of material |
| Cure Indicator | N/A | N/A | Indicates cure of some thermosetting materials | |
| Factors | Time Sensitivity | N/A | N/A | Creep and recovery affect measurements |
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Get ASTM D785 CNC machining parts from Baetro
Baetro delivers durable and efficient CNC machining parts of ASTM D785 standards, incorporating precise and exacting design. Our parts, which are tailored to the performance requirements of the automotive, aerospace, and medical industries, provide dependability and accuracy in the most demanding applications.
