Jis K 6251 Pdf Jun 2026

Ensure that rubber components, such as seals, gaskets, and hoses, meet the required specifications for durability.

JIS K 6251 is developed and maintained by the under the framework of Japan's Industrial Standardization Law. The standard is published by the Japanese Standards Association (JSA) and is administered through the Japan Rubber Manufacturers Association (JRMA). Because this is a Japanese industrial standard, many official publications are available in both Japanese (和文) and English translation (英訳) formats.

: The previous version, which is now superseded but often still referenced in older technical specifications. Earlier Versions : Included 2010, 2004, and 1993 editions. 3. Testing Methodology jis k 6251 pdf

| Type | Overall Length | Width of Narrow Portion | Suitability | |------|----------------|------------------------|--------------| | Type 1 | ≥ 115 mm | 25 mm | Sheet, hose, tubing | | Type 2 | ≥ 75 mm | 6.0 mm | Small specimens, low force | | Type 3 | ≥ 50 mm | 4.0 mm | Micro-specimens | | Type 4 (Ring) | – | – | For small tubes or O-rings |

Typically, the test speed is 500 ± 50 mm/min (standard speed), though some standards may allow 200 mm/min. Ensure that rubber components, such as seals, gaskets,

This standard provides the testing methods for measuring several critical mechanical properties of rubber materials:

Place the specimen in the grips, start the machine at a standard speed (usually 500 ± 50 mm/min), and run until failure. Because this is a Japanese industrial standard, many

When working in global manufacturing, cross-referencing national standards is essential. JIS K 6251 is technically aligned with several international frameworks, though slight structural differences exist regarding specimen dimensions or grip speeds.