Significance and Use
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.
Scope
1.1 These test methods cover procedures for the chemical analysis of copper-nickel and copper-nickel-zinc alloys having chemical compositions within the following limits:
Includes cobalt.
In the case of copper-base alloys containing 5 % and over of zinc, the zinc is usually calculated by difference.
Element Concentration Range,%
Copper 40 and over
Nickel 10 to 50
Zinc 0 to 40
Lead 0 to 15
Tin 0 to 10
Iron 0.00 to 2
Manganese 0.00 to 2
Cobalt 0.00 to 0.5
Whenever possible the technique and procedures for analysis should be checked against a National Institute of Standards and Technology standard sample having a composition comparable to the material being analyzed.
1.2 The test methods appear in the following order:
Periodate (Photometric)Method
Sections
Cobalt:
Alpha-Nitroso-Beta-Naphthol Method 26 to 28
Nitroso-R-Salt (Photometric) Method 29 to 37
Copper, or Copper and Lead Simultaneously, by the Electrolytic Method 2a
Iron:
Dichromate Method 38 to 40
Thiocyanate (Photometric)Method 2a
Salicylate (Photometric)Method 2a
Lead:
Electrolytic Method 12 to 15
Sulfate Method 2 b
Manganese:
Persulfate Method 2 b
59 to 66
Nickel by the Dimethylglyoxime Method 2a
Tin by the Iodimetric Titration Method 2b
Zinc by the Oxide or Ferrocyanide Method 2a
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 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 E 50.
