【国外标准】 Standard Test Methods for Chemical Analysis of Ferrochrome-Silicon (Withdrawn 2006)

1.1 These test methods cover the chemical analysis of ferrochrome-silicon having chemical compositions within the following limits:Element Concentration,%Aluminum 0.50 maxAntimony 0.005 maxArsenic 0.005 maxBismuth 0.005 maxBoron 0.005 maxCarbon 0.15 maxChromium 34.0 to 47.0Cobalt 0.10 maxColumbium 0.050 maxCopper 0.050 maxLead 0.005 maxManganese 0.75 maxMolybdenum 0.050 maxNickel 0.50 maxNitrogen 0.050 maxPhosphorus 0.030 maxSilicon 30.0 to 45.0Silver 0.005 maxSulfur 0.030 maxTantalum 0.050 maxTin 0.005 maxTitanium 0.50 maxVanadium 0.50 maxZinc 0.005 maxZirconium 0.050 max1.2 The test methods appear in the following order: SectionsArsenic by the Molybdenum Blue Photometric Method 8-18Chromium by the Acid Dissolution Titrimetric Method 19-25Silicon by the Sodium Peroxide Fusion-Perchloric Acid Dehydration Method 26-331.3This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. For precautions to be observed in these test methods, refer to Practices E50, and to precautions included in the individual methods.