Calibration Standards By Nbs For Stainless Steel Alloys, Unopened, Sold As A Lot

US $449.99

Berwyn, Pennsylvania, United States
Jan 30th

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Important Bidding Instructions: You are bidding on all the items in the tables below. All my unused stock of alloy tool steels of this size are listed here; there are no others available and no possibility of any back orders. The National Institute of Standards and Technology (NIST), formerly the National Bureau of Standards (NBS), is part of the U.S. Department of Commerce. The NBS issued standard samples of industrial materials which were carefully analyzed in a number of selected laboratories and their results averaged. A certificate listing the chemical compositions of the standard samples was originally provided along with each small piece (each is a rod 1/2 inch in diameter by 2 inches long in the present instance). These pieces were obtained by us from an industrial laboratory which was closing its doors for good. They are in their original "cigar tubes" and their markings match the tube's markings. The original certificates are long gone, but the Defense Technology Information Center (dtic.mil) has thoughtfully archived the NBS list of these Standard Samples issued in the past and you can find these particular Standard Sample numbers and their detailed compositions yourself by googling the term, "a278140.pdf" for the Standard Samples 845 through 850 contained in the following tables. Descriptions of the various Standard Samples of stainless steel alloys: Note: Apparently identical descriptions of different Standard Samples do not indicate identical compositions or date codes as marked on the packaging; that is the result of packing & shipping in different batches. The date codes on the packages do not match the dates of the certificates. However, Standard Samples with the same number are indeed of the same composition, as indicated by the compositions listed in differently dated published lists of the National Bureau of Standards. About the photographs: The first image shows all but one of the Standard Samples covered by this auction. The second image shows a composite image of a typical package label. Every Standard Sample in this auction is represented in these two images; you are bidding on the entire lot of six items. ID Description ID Description 845 Modified AISI 410 S/S, w. 13 pct Cr & 0.9 pct Mo 848 Modified AISI 403 S/S, w. 9 pct Cr & 0.3 pct Mo 846 Modified AISI 321 S/S, w. 18 pct Cr & 9 pct Ni 849 Stainless steel (S/S) w. 5.5 pct Cr & 6.5 pct Ni 847 Modified AISI 309 S/S, w. 24 pct Cr & 13 pct Ni 850 Stainless steel with 3 pct Cr & 25 pct Ni The following NBS Standard Samples are available in this auction: These "new" Standard Samples have not even been opened. Sample Identification Available Quantity Sample Identification Available Quantity 845 1 unopened 848 1 unopened 846 1 unopened 849 1 unopened 847 1 unopened 850 1 unopened These little rods are intended as reference standards for the measurement of a similar metal (such as a stainless steel to be analyzed for manganese, copper, nickel, chromium, molybdenum, aluminum, tin, cobalt, etc.) by electrical discharge spectroscopy, wherein the specimen is one electrode subjected to an electrical arc which vaporizes all the elements contained in the specimen and heats them to white-hot incandescence. A wavelength-dispersive spectrometer then separates the light emitted by the various elements, and the intensities of those separate wavelengths of light are measured quantitatively. The composition of the specimen under study is determined by interpolation of its measured light intensities between the intensities produced by other specimens of similar composition. Specimens of known composition are an essential ingredient in the accurate determination of the elemental composition of unknown specimens, as the standard specimens have had their compositions measured by independent laboratories with state of the art equipment that would be too expensive for a local laboratory to maintain. You could also use these standard samples as references in the analysis of unknown steels by electron microbe wavelength spectroscopy (as in Amenex's former ETEC Autoprobe, which we sold on eBay about fourteen years ago) or by energy dispersive spectroscopy (EDX) in a scanning electron microscope (SEM). The NIST is currently charging up to several hundred dollars for similar standard samples as you can see by googling "pricerpt.cfm", but the standard samples with the numbers listed above have long been out of stock.

Condition	New other (see details) : A new, unused item with absolutely no signs of wear. The item may be missing the original packaging, or in the original packaging but not sealed. The item may be a factory second or a new, unused item with defects. See the seller’s listing for full details and description of any imperfections.
Seller Notes	“These six Standard Samples are in their original packages, unopened. All of each Standard Sample remains available for in the calibration of analytical equipment for determining the elemental compositions of stainless steel alloys.”