Often called "modulus" (e.g., 100% or 200% stress), measuring the force required to reach a specific stretch level. Test Specimen & Equipment
The stress at a given elongation (e.g., 100% Modulus) is determined by reading the stress value from the stress-strain curve at the specified elongation point.
EB=Lb−L0L0×100cap E sub cap B equals the fraction with numerator cap L sub b minus cap L sub 0 and denominator cap L sub 0 end-fraction cross 100 EBcap E sub cap B = Elongation at break (%) Lbcap L sub b = Gauge length at the moment of rupture (mm) L0cap L sub 0 = Original gauge length (mm) Comparison: JIS K 6251 vs. ISO 37 vs. ASTM D412 jis k 6251 pdf
It is classified as "MOD" (Modified) compared to ISO 37, meaning it follows the core international methodology but has specific regional variations. Intertek Inform Test Methodology & Equipment Testing is typically performed on a Universal Testing Machine 日本規格協会 JSA GROUP Webdesk Jis K6251 | PDF - Scribd
: At 100% elongation, the sensors recorded his tensile stress . He was holding firm, proving he wasn't just some "silly putty" that would ooze away under pressure. Often called "modulus" (e
Understanding its alignment with ISO 37 and its distinctions from ASTM D412 or DIN 53504 is key to global quality management. While older versions might be tempting to download for free, the path to reliable, legally compliant results lies in using the most current edition——obtained through official channels like the JSA Web Store. For quality professionals, compliance is not just about the test; it is about using the right document to define the test. JIS K 6251 provides that definition with unmatched technical rigor and national authority.
If you need a standard for reference or historical research, an older free version may be useful. However, for , you should obtain the official current edition through legitimate channels. ISO 37 vs
The stress at which the material begins to deform permanently (applies only to materials with a defined yield point).
The standard is overseen by the Japanese Industrial Standards Committee (JISC) and published by the Japanese Standards Association (JSA). Its importance lies in its ability to provide a repeatable and reliable framework for testing, which is essential for product development, quality assurance, and international trade.
Dumbbell shapes are preferred because they force the physical fracture to occur within a narrow, defined central "gauge length," away from the gripping jaws. JIS K 6251 classifies these into several sizes: