ASTM E1086-14 pdf free download.Standard Test Method for Analysis of Austenitic Stainless Steel by Spark Atomic Emission Spectrometry.
1.2 This test method is designed for the 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 he sulliciently massive to prevent overheating during the discharge and of a similar metallurgical condiLion and composition as the reference materials.
1 .3 One or more of the reference materials must closely approximate the composition of the specimen. The technique of analyiing reference materials with unknowns and performing the indicated mathematical corrections may also be used to correct for interference etiects and to compensate for errors resulting from instrument drift. A variety of such systems are commonly used. Any of these that will achieve analytical accuracy equivalent to that reported for this test method are acceptable.
6. Apparatus
6. 1 Sampling and Sam pie Preparation Equipuwni:
6.1.1 Refer to Practice E1806 for devices arid practices to sample liquid and solid steel.
6. 1 .2 Abrasive Grinder, a suitable belt grinder. horitontal disk grinder, or similar grinding apparatus. The resulting surface should be uniformly plane and free of defects. These may be either wet or dry grinding devices. Grinding materials with grit sizes ranging from 60 to I 80 have been found satisfactory.
6.2 Excitation Source, with parameters capable of producing a usable spectrum in accordance with I I. I.
6.3 Excitation Stand, suitable for mounting in optical alignment, a flat surface of the specimen in opposition to a counter electrode. The stand shall provide an atmosphere of argon and may be water cooled. Counter electrodes and argon are described in 7.1 and 7.2.
6.4 Spectrometer having sufficient resolving power and linear dispersion to separate clearly the analytical lines from other lines in the spectrum of a specimen in the spectral region 170.0 nm to 500.0 nm. Spectrometer characteristics for two of the instruments used in this test method are described as having dispersion of 0.697 nm/mm (first order), and a focal length of 1 m. Spectral lines are listed in Table I.ASTM E1086 pdf download.