Standard sizes used for general rubber compounds when ample material is available.
Samples must be conditioned at and 50 ± 5% relative humidity for at least 3 hours before testing.
: It specifies standard shapes (Dumb-bell Nos. 1–6) used for testing. 2. How to Access JIS K 6251 Safely
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Here is a final checklist to help you decide which path is right for you:
JIS K 6251 prescribes specific shapes for test specimens, commonly referred to as dumbbells. The choice of dumbbell depends on the expected elasticity and thickness of the material:
If you are setting up a laboratory configuration or evaluating a rubber material, let me know:
The Japanese standard, heavily harmonized with ISO but featuring distinct historical specimen dimensions (such as the Type 3 dumbbell).