National Bureau of Standards Miscellaneous PublicationU.S. Government Printing Office, 1964 |
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Page 18
... approximately one - half the sample thickness ; above this the structure consisted of randomly oriented dendrites . The change to random orientation was gradual in samples of NBS Nos . 1178 and 1180 , with no distinct boundary between ...
... approximately one - half the sample thickness ; above this the structure consisted of randomly oriented dendrites . The change to random orientation was gradual in samples of NBS Nos . 1178 and 1180 , with no distinct boundary between ...
Page 21
... approximately of ± 1 percent of the amount present is normally acceptable , whether or not statistical significance is observed . The value of ± 1.3 percent for manganese among the nine plates was deemed acceptable from the practical ...
... approximately of ± 1 percent of the amount present is normally acceptable , whether or not statistical significance is observed . The value of ± 1.3 percent for manganese among the nine plates was deemed acceptable from the practical ...
Page 25
... ( approximately 0.1 percent ; the other standards contain less than 0.01 percent ) . agreement for most was obtained . Current plans are to certify additional elements in these standards as well as in new cast iron standards . 12 ...
... ( approximately 0.1 percent ; the other standards contain less than 0.01 percent ) . agreement for most was obtained . Current plans are to certify additional elements in these standards as well as in new cast iron standards . 12 ...
Page 29
... approximately 0.1 percent of free graphite ; the other standards all were found to contain less than 0.01 percent . 14. ADDENDUM Two new white cast iron standards , a high- and a low- composition alloy , were melted and cast in February ...
... approximately 0.1 percent of free graphite ; the other standards all were found to contain less than 0.01 percent . 14. ADDENDUM Two new white cast iron standards , a high- and a low- composition alloy , were melted and cast in February ...
Page 9
... approximately 600 lb were melted under a charcoal cover . Careful control was maintained over the melting procedures to include time , temperature , and amount and order of additions to the furnace . Table 3 shows as an example the melt ...
... approximately 600 lb were melted under a charcoal cover . Careful control was maintained over the melting procedures to include time , temperature , and amount and order of additions to the furnace . Table 3 shows as an example the melt ...
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acid solution add 10 ml aliquot alloy ammonium Analytical Analytical curve assay average beaker boil Bureau of Standards butyl acetate calibration carbon Cartridge Brass cents chemical shift chill-cast chromium composition Cool copper Copper-Base Spectrochemical Standards COPPER-BASE STANDARDS determination dilute Dissolve electrolyte electron probe electron probe microanalysis elements Erlenmeyer flask ferrite Figure filter free-cutting brass fumes glass grain heat homogeneity inclusions Institute for Materials Laboratory Low-Alloy Steel manganese Materials Research mean free path measurement metal method microns ml of H2SO4 ml of HNO3 ml of water Mossbauer National Bureau NBS Misc NBS Miscellaneous Publication NBS Spectrometric nickel nitric acid obtained oxide paper pearlite percent photometric precipitate procedure Publ Reagents sodium sodium nitroprusside spectrometer standard deviation Standard Reference Materials sulfate sulfuric acid Technology titration Transfer uranium Vacuum fusion values vanadium viscosity volumetric flask wash weight white cast iron x-ray zinc