Often referred to colloquially as the "modulus" (e.g., 100% modulus or 300% modulus). It represents the stress required to stretch the rubber to a specific percentage of its original length.
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The tensile force at rupture divided by the initial cross-sectional area. Specimen Types and Geometries
JIS K 6251:2017 is heavily based on ISO 37:2011, meaning that many tests conducted under Japanese standards are compatible with international quality standards. However, the JIS standard includes Japanese industrial specificities, such as specific dumbbell types and smaller test pieces suited for particular automotive or electronics components. How to Obtain JIS K 6251 PDF Often referred to colloquially as the "modulus" (e
Comprehensive Guide to JIS K 6251: Tensile Testing for Rubber
The global manufacturing landscape requires standardization harmony. JIS K 6251 is highly harmonized with international standards, but minor differences exist. Feature / Standard JIS K 6251 Japan / Asia Global / Europe North America Scope Vulcanized & Thermoplastic Rubber Vulcanized & Thermoplastic Rubber Vulcanized Rubber & Thermoplastic Elastomers Typical Pull Speed 500 mm/min 500 mm/min 500 mm/min Specimen Names Type 1 to 7 Dumbbells Type 1 to 4 Dumbbells, Rings Die A to F Dumbbells, Cut Rings Specimen Types and Geometries JIS K 6251:2017 is
The stress stage at which deformation changes from elastic (reversible) to plastic (permanent). Test Specimen Types (Dumbbell Shapes)
: If you need the standard for official compliance, buy the current version from authorized vendors: Intertek Inform (2023 edition). ANSI Webstore (2017 edition). Accuris Standards Store (Multiple editions available). 3. International Correspondence
Free PDFs uploaded to unauthorized forums are often decades old. Testing against an outdated revision can invalidate your laboratory's ISO 17025 accreditation or breach client contracts.
is the Japanese Industrial Standard for determining the tensile stress-strain properties of vulcanized and thermoplastic rubbers. While the official full-text standards typically require purchase, there are specific legal ways to view or access the content. 1. Understanding JIS K 6251