BS EN ISO 2566-2:2001

1   Scope and field of application This part of ISO 2566 specifies a method of converting room temperature percentage elongations after fracture obtained on various proportional and non-proportional gauge lengths to other gauge lengths . The formula (see clause 4) on which conversions are based is considered to be reliable when applied to austenitic stainless steels within the tensile strength range 450 to 750 N/mm 2 and in the solution treated condition. These conversions are not applicable to

       a)  cold reduced steels; 
   
   
     
       b)  quenched and tempered steels; 
   
   
     
       c)  non-austenitic steels. 
   
 

Neither should they be used where the gauge length exceeds 25 S 0 or where the width to thickness ratio of the test piece exceeds 20. Care should be exercised in the case of strip under 3 mm thickness, as the index in the formula given in clause 4 increases with decreasing thickness; the value to be used shall be the subject of agreement between the customer and the supplier.