ASTM E1086-14 pdf free download.Standard Test Method for Analysis of Austenitic Stainless Steel by Spark Atomic Emission Spectrometry.
ASTM E1086-14 covers the analysis of austenitic nless steel by spark atomic emission vacuum spectrometry the following elements in the ranges shown.
This test method is designed fo routine analysis of chill-cast disks or inspection testing of stainless steel samples that have a flat surface of at least 13 mm (0.5 in. ) in diameter. The samples must be sufficiently massive to prevent overheating during the discharge and of a similar metallurgical condi tion and composition as the reference materials.
4. Summary of Test Method
4.1 A controlled discharge is produced between the flat surface of the specimen and the counter electrode. The radiant energy of selected analytical lines are converted into electrical energies by photomultiplier tubes and stored on capacitors. The discharge is terminated at a predetermined level of accumu lated radiant energy from the internal standard iron line or after a fixed integration time. At the end of the integration period. the charge on each capacitor is measured, and displayed or ecorded as a relative energy or mass fraction %.
9. Preparation of Samples
9.1 The specimens and reference materials must be prepared in the same manner. A specimen cut from a large sample section must be of sufficient size and thickness for preparation and to properly fit the spectrometer stand.
9.2 Ensure the specimens are homogenous and free from voids and pits in the region to be excited. Grind the surface with an abrasive belt or disc. Refer to 6.1.2. Perform the final grind with a dry abrasive belt or disc.
Calculation of Results
14.1 Average the readings obtained for each specimen. If
the readout is not in direct mass fraction % o units, use this value to obtain the mass fraction from the curves or related scale values and mass fraction % by reference to a table that has been previously prepared.
15. Precision and Bias
15.1 Precision-The precision of this test method was determined by submitting three stainless alloy samples to five different laboratories. The interlaboratory testing was con ducted in accordance with Practice E1060 Instrument calibrations were performed utilizing (1)reference materials supplied with the unknowns, (2) in-house reference materials, and (3) NIST and British Certified reference materials. The unknowns and in-house reference materials were run on three separate days. The precision data for the three unknowns are shown in Table 2.
16.1 austenitic stainless steel,spark atomic emission,spectrometric analysis,spectrometry