ASTM D 2240 is a standard test method published by the American Society for Testing and Materials (ASTM) for measuring the hardness of rubber products. Rubber hardness is defined as its resistance to permanent indentation. You measure it using a durometer, a type of instrument that applies a standardized force to the surface of the rubber. The durometer used in this test method measures the hardness on a scale ranging from 0 to 100, where higher values indicate a harder material. The ASTM D 2240 standard is widely used in various industries, including automotive, aerospace, and construction, to ensure consistent and reliable measurements of rubber hardness. ASTM D 2240 covers type A and type D durometer scales used to measure different rubber products. The type A scale is used for softer rubbers, while type D is used for harder ones.

NextGen’s Advanced Portable Shore Durometer System complies with ASTM D 2240 standard.

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