This group of methods describes tests for determining the short-term tensile properties of the range of materials detailed in clause 1; this does not include films, thin sheet, PTFE and cellular materials. Methods applicable to thin sheet and film are described in Methods 326A to 326C•. Methods 320C to 320F are revisions and extensions of, and replace, methods 301 A to 301 L 'Mechanical properties. Tensile strength and elongation at break' of BS 2782: 1970, with the exception of method 301 K dealing with PTFE (excluding rod). Methods 301A to 301 L (excluding 301 K) of BS 2782: 1970 are therefore withdrawn. It is intended to revise method 301 K of BS 2782 : 1970 and publish it separately as Method 327 A *.
The materials have been divided into four categories according to type of test piece. The range of testing speeds specified is such that, for most materials, conditions can be selected so that they reach their yield point or point of rupture in 20 s or 100 s.
The methods are intended to be used for material characterization purposes and for routine quality control work. The methods given combine the determination of stress and strain data. However, the information that is noted or recorded-(luring the test may be confined to the measurement of one particular feature. depending on the scope and purpose of the evaluation.
The methods of test outlined here incorporate a wider range of test pieces than ISO/R 527 but there is general agreement with regard to technical content.
