Research Report RR:E28-1015
An interlaboratory testing program was organized by the Metals Property Council to determine the precision for E21, Standard Practice for Elevated Temperature Tension Testing of Materials. The details of the test program are given in Appendix I. Basically, four alloys were selected that would give a wide range of properties at elevated temperature. The materials were a low carbon steel, a 2-1/4 Cr - 1 Mo ferritic alloy, Type 304 stainless steel, and A-286, a precipitation hardening high temperature alloy. The tension tests were run at 600�F and 1100�F with three replicate specimens. For each test the 0.2% offset yield strength, ultimate tensile strength, percent elongation, and percent reduction of area were measured. This report presents the results of this study and the statistical analysis made according to ASTM E691, Standard Practice for Conducting an Interlaboratory Test Program to Determine the Precision of Test Methods. Based on the statistical analysis, a precision statement was written for the test method described in ASTM E21. The proposed precision statement is attached as Appendix II.
E21-17e1 Standard Test Methods for Elevated Temperature Tension Tests of Metallic Materials
Committee E28 on Mechanical Testing
Subcommittee E28.04 on Uniaxial Testing