Iso 6892-1 ((top)) -

| Feature | ISO 6892-1 | ASTM E8/E8M | |---------|-------------|--------------| | Strain rate control | Preferred (Method A) | Allowed but less common | | Specimen geometry | Proportional preferred (( k=5.65 )) | Often fixed gauge length | | Extensometer use | Required for ( R_p ) and ( R_e ) | Required only for certain properties | | Units | SI (MPa) | SI or psi |

: The strongly recommended method, designed to minimize measurement uncertainty and variation in test rates. A1 : Closed-loop control. A2 : Open-loop control (crosshead separation rate). iso 6892-1

The most significant technical aspect of modern ISO 6892-1 (introduced in the 2009 revision and refined since) is the shift towards . | Feature | ISO 6892-1 | ASTM E8/E8M