You cannot substitute ASTM D471 for JIS K 6258 if your customer explicitly requires the JIS standard. The slight differences in volume swelling calculation could lead to a failed approval. You need the exact JIS K 6258 English PDF.
: The rubber was left to soak under strictly controlled temperatures, simulating years of engine wear in just a few days. 2. The Moment of Truth jis k 6258 english pdf
After the immersion period, Kenji’s team measured the "before and after." They weren't just looking for visible damage; they used the standard's formulas to calculate: Mass and Volume Change : Did the rubber absorb the oil and swell? Dimensional Accuracy You cannot substitute ASTM D471 for JIS K
This is the international equivalent. JIS K 6258 is highly harmonized with ISO 1817, meaning a test run under the JIS standard will yield nearly identical data to the ISO equivalent, provided the same reference oils are used. : The rubber was left to soak under