These test methods for the chemical analysis of metals and alloys are primarily intended to test such materials for compliance with compositional specifications such as Specification A101 and A481. 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.

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

	Element	Concentration, %
	Aluminum	0.25 max
	Antimony	0.005 max
	Arsenic	0.005 max
	Bismuth	0.005 max
	Boron	0.005 max
	Carbon	9.00 max
	Chromium	51.0 to 99.5
	Cobalt	0.10 max
	Columbium	0.05 max
	Copper	0.05 max
	Lead	0.005 max
	Manganese	0.75 max
	Molybdenum	0.05 max
	Nickel	0.50 max
	Nitrogen	6.00 max
	Phosphorus	0.03 max
	Silicon	12.00 max
	Silver	0.005 max
	Sulfur	0.07 max
	Tantalum	0.05 max
	Tin	0.005 max
	Titanium	0.50 max
	Vanadium	0.50 max
	Zinc	0.005 max
	Zirconium	0.05 max

1.2 The analytical procedures appear in the following order:

	Sections
Arsenic by the Molybdenum Blue Photometric Test Method [0.001 % to 0.005 %]	10-20
Lead by the Dithizone Photometric Test Method [0.001 % to 0.05 %]	21-31
Chromium by the Sodium Peroxide Fusion-Titrimetric Test Method [50 % to 75 %]	32-38

1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.4 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 6.

10.1 This test method covers the determination of arsenic in chromium and ferrochromium in concentrations from 0.001 % to 0.005 %.