Jis K 6251 Pdf Jun 2026 The standard defines several "dumb-bell" and ring-shaped test pieces. Identified as No. 1, No. 2, No. 3, etc. is the definitive Japanese Industrial Standard for determining the tensile properties of vulcanized rubber and thermoplastic elastomers. It outlines the methodology for measuring tensile strength, elongation at break, and stress at a specific elongation (modulus). jis k 6251 pdf ): The maximum tensile stress recorded at the moment a specimen ruptures. Elongation at Break ( Ebcap E sub b It outlines the methodology for measuring tensile strength, JIS K 6251 PDF: The Definitive Guide to Tensile Testing of Vulcanized Rubber elongation at break | Feature | JIS K 6251 (Japan) | ISO 37 (International) | ASTM D412 (USA) | DIN 53504 (Germany) | | :--------------- | :----------------------------------------------------- | :----------------------------------------------------- | :--------------------------------------------------------- | :------------------------------------------------------ | | | Rubber, vulcanized or thermoplastic - Determination of tensile stress-strain properties | Rubber, vulcanized or thermoplastic - Determination of tensile stress-strain properties | Standard Test Methods for Vulcanized Rubber and Thermoplastic Elastomers—Tension | Testing of rubber - Determination of tensile properties | | Test Speed | 500 mm/min (typically for No. 3 dumbbell) | 500 mm/min (typical) | 500 mm/min (typical) | 200 mm/min (varies by specimen type) | | Specimen Type | Primarily uses dumbbell specimens Nos. 1–6 | Primarily uses dumbbell specimens Types 1–4 | Primarily uses dumbbell specimens Die C | Uses dumbbell specimens S1, S2, S3A | | Harmonization | Technically aligned with ISO 37 (especially 2017 and later editions) | Serves as the international benchmark | Different specimen shapes and conditioning requirements | Different test speed and specimen shapes | The American standard for rubber tension. While similar in objective, ASTM D412 uses different dumbbell designations (e.g., Die C) compared to JIS dumbbell numbering. Accessing the JIS K 6251 PDF Note: Always ensure you are utilizing the most recent version of the standard to maintain compliance. Key Differences from ISO 37