1.1 These methods cover the chemical analysis of ferrocolumbium having chemical compositions within the following limits: | Element | Concentration, % | | | Aluminum | 2.00 max | | Carbon | 0.30 max | | Chromium | 2.00 max | | Cobalt | 0.25 max | | Niobium | 40.00 to 75.00 | | Lead | 0.01 max | | Manganese | 3.00 max | | Phosphorus | 0.05 max | | Silicon | 4.00 max | | Sulfur | 0.03 max | | Tantalum | 7.00 max | | Tin | 0.15 max | | Titanium | 5.00 max | | Tungsten | 0.50 max |
1.2 The methods appear in the following order: | Sections | | | Niobium, Tantalum, and Titanium by the | | | Ion-Exchange Method | 9-30 |
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of whoever uses this standard to consult and establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Specific precautionary statements are given in Section 5. |
E60-11(2022)e1 | Standard Practice for Analysis of Metals, Ores, and Related Materials by Spectrophotometry (Includes all amendments and changes 6/29/2022). |
E50-17 | Standard Practices for Apparatus, Reagents, and Safety Considerations for Chemical Analysis of Metals, Ores, and Related Materials |
E32-21 | Standard Practices for Sampling Ferroalloys and Steel Additives for Determination of Chemical Composition |
E29-22 | Standard Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications |
A550-16(2021) | Standard Specification for Ferrocolumbium (Ferroniobium) |
E173-93 | Practice for Conducting Interlaboratory Studies of Methods for Chemical Analysis of Metals (Withdrawn 1997) |
E1601-19 | Standard Practice for Conducting an Interlaboratory Study to Evaluate the Performance of an Analytical Method |
E135-23a | Standard Terminology Relating to Analytical Chemistry for Metals, Ores, and Related Materials (Includes all amendments and changes 7/17/2023). |
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