30D40

30D40 refers to a specific classification within certain industries, often related to materials science or engineering. The "30D" portion of the designation typically indicates a Shore hardness value, a measurement of the indentation hardness of a material. In this case, "30D" suggests a reading on the Shore D scale, which is used for harder plastics and elastomers. The "40" might represent a specific grade, formulation, or a particular characteristic of the material, such as its tensile strength, density, or a modifier additive. Without further context, the precise meaning of "30D40" can vary. It is commonly encountered in specifications for rubber, plastic components, or specialized polymers where precise material properties are critical for performance. Understanding the full designation requires knowledge of the specific industry standard or company catalog from which it originates. For instance, in the context of rubber compounds, it could denote a specific formulation with a Shore D hardness of 30 and other properties defined by the "40" identifier. This level of detail is crucial for ensuring material compatibility and product integrity in manufacturing and product development.