Значение и использование

These test methods for the chemical analysis of metals and alloys are primarily intended to test such materials for compliance with compositional specifications. It is assumed that all who use these test methods will be trained analysts capable of performing common laboratory procedures skillfully and safely. It is expected that work will be performed in a properly equipped laboratory.

Область применения

1.1 These test methods cover the chemical analysis of chromium and ferrochromium having chemical compositions within the following limits:

ElementConcentration, %Aluminum0.25 maxAntimony0.005 maxArsenic0.005 maxBismuth0.005 maxBoron0.005 maxCarbon9.00 maxChromium51.0 to 99.5Cobalt0.10 maxColumbium0.05 maxCopper0.05 maxLead0.005 maxManganese0.75 maxMolybdenum0.05 maxNickel0.50 maxNitrogen6.00 maxPhosphorus0.03 maxSilicon12.00 maxSilver0.005 maxSulfur0.07 maxTantalum0.05 maxTin0.005 maxTitanium0.50 maxVanadium0.50 maxZinc0.005 maxZirconium0.05 max

1.2 The analytical procedures appear in the following order:

SectionsArsenic by the Molybdenum Blue Photometric Method9-19Lead by the Dithizone Photometric Method20-30Chromium by the Sodium Peroxide Fusion-Titrimetric Method31-37

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 hazard statements are given in Section 5.