IEC 61621 vs ASTM D495: What Actually Differs
ASTM D495 says it plainly in its own referenced-documents clause: IEC 61621 is technically equivalent to D495 and was built directly from it. That sentence gets quoted a lot, usually to justify treating a number from one as a number from the other. It does not mean that. “Technically equivalent” describes the method. It does not make the… Read More: IEC 61621 vs ASTM D495: What Actually Differs »