Often referred to as "modulus" (e.g., 100% or 300% modulus).
| Feature | JIS K 6251 | ISO 37 | ASTM D412 | |---------|------------|--------|-----------| | | Japan | International | USA | | Test speeds | 500 mm/min (standard) | 500 mm/min (preferred) | 500 mm/min (Die C) | | Specimen types | Dumbbells (3 types) + rings | Dumbbells (3 types) + rings | Die A, B, C, D, rings | | Gauge length | 25 mm (Type 1,2) | 25 mm (Type 2) | 25 mm (Die C) | | Acceptance in Japan | Mandatory | Often accepted if agreed | Rarely accepted | | Technical difference | Slight variations in specimen dimensions | Virtually identical | Wide tolerances on width |
The Complete Guide to JIS K 6251: Understanding Tensile Testing for Rubber
Utilizing pirated intellectual property within a commercial enterprise introduces severe legal and audit risks. Legitimate Ways to Access JIS K 6251
The JSA provides a free preview (first few pages) that includes the scope and key definitions, which is often sufficient for understanding the basics. jis k 6251 pdf free
Do you need assistance mapping a between JIS K 6251 and ASTM D412 parameters?
To access: Visit www.jsa.or.jp → Search “JIS K 6251” → Click “Preview.” No login required.
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If you are searching for a , it is essential to understand what this standard regulates, why it matters to your industry, and how to access compliance data safely and legally. What is JIS K 6251? Often referred to as "modulus" (e
If you are looking for specific, in-depth technical data on specimen preparation, can you tell me: Which specimen type (1, 2, or 3) are you using? Is your material thermoplastic or vulcanized?
The testing machine must feature a power-driven grip mechanism capable of moving at a constant rate of separation. For most JIS K 6251 evaluations, the standard crosshead speed is set to , though certain specialized compounds may dictate alternative speeds. 2. Extensometers vs. Crosshead Travel
One of the most common questions from rubber testing labs is: “Can I use ISO 37 instead of JIS K 6251?”
: Often called "modulus," such as 100% or 200% tensile stress. Yield Points Do you need assistance mapping a between JIS
Testing typically involves stretching a rubber specimen until it fails while recording force and displacement. Specimen Shapes
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| Feature | | ISO 37 | ASTM D412 | | :--- | :--- | :--- | :--- | | Governing Body | Japanese Industrial Standards (JIS) | International Organization for Standardization (ISO) | ASTM International (formerly American Society for Testing and Materials) | | Primary Use | Tensile testing of vulcanized & thermoplastic rubbers | Tensile testing of vulcanized & thermoplastic rubbers | Tensile testing of rubber and thermoplastic elastomers | | Relationship to JIS K 6251 | N/A | Almost identical. JIS K 6251 is largely based on and technically aligned with ISO 37. | Similar, but not identical. There are differences in specimen shapes (Dies) and some testing speeds. | | Specimen Shapes | Dumbbell (Types 1, 2, 3, 4) and Ring shapes | Dumbbell (Types 1, 2, 3, 4) and Ring shapes | Die C, Die D, etc. | | Typical Test Speed | 500 mm/min (for dumbbell) | 500 mm/min (for dumbbell) | 500 mm/min (for Die C) |