The maximum tensile stress recorded executed up to the point of rupture.
The point at which the rubber begins to deform plastically rather than elastically (applicable to specific thermoplastic rubbers). Test Specimen Types and Preparation
Miniaturized micro-shapes explicitly detailed for instances where material is scarce, or samples must be harvested from complex finished components like automotive tires or hoses. Testing Equipment Requirements
One of the most frequent questions regarding this standard is how it compares to . jis k 6251 pdf
| 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 specimen is mounted, ensuring it is centered. Testing: The machine extends the specimen until it breaks.
When utilizing the guidelines in the JIS K 6251 PDF, technicians extract several vital data points from a single stress-strain test: The maximum tensile stress recorded executed up to
The stress required to stretch a test piece to a given elongation (typically 100%, 200%, or 300%).
To ensure consistent results, the standard mandates specific test piece shapes and environmental conditions. Long-Stroke Tensile Testing System for Vulcanized Rubber
The exact of the JIS K 6251 document you are referencing. Testing Equipment Requirements One of the most frequent
According to the scope of JIS K 6251:2023, the key properties to be determined are:
While these three standards are globally accepted for rubber tensile testing, they are not completely identical mirror images. JIS K 6251 Japan (JSA) International (ISO) United States (ASTM) Common Die No. 3 Dumbbell Type 2 Dumbbell Alignment Historically harmonized with ISO Technical baseline for JIS Separate development history Speeds Typically 500 mm/min Typically 500 mm/min ±plus or minus
: Applicable specifically to elastomer compounds that present a clear physical yield point before permanent deformation. Core Standard Specifications and Evolution
Rubber compounds are highly sensitive to processing conditions, formulation changes, and environmental exposure. JIS K 6251 provides a universal benchmark for several critical processes: