Standard sizes used for general rubber testing.
Controlled temperature and humidity levels to ensure repeatability.
The JIS K 6251 standard covers the following aspects: jis k 6251 pdf free
: Often called the "modulus," this measures the force resistance at specific strain levels like 100% or 300%.
The standard allows both. are more common and are preferred for measuring tensile strength, as they ensure breakage occurs in the narrow, parallel part of the sample. Ring specimens are sometimes used for high elongation materials or to avoid the edge effects that can occur with dumbbell samples, but they are generally less common. Standard sizes used for general rubber testing
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The specifications for the tensile testing machines (tensile testers). The standard allows both
Uses different die shapes (e.g., Die C) and imperial/metric units The Risks of Downloading "JIS K 6251 PDF Free" Links
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The stress required to stretch the test piece to a given elongation, such as 100%, 200%, or 300%. This is often referred to as the "modulus" of the rubber, which indicates its stiffness. Specimen Shapes: The Dumbbell Types
: Uses "dumbbell" (dogbone) or ring-shaped test pieces. Common dumbbell types are numbered 1 through 6.