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.
1. 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:
| 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 |
Includes cobalt. In the case of copper-base alloys containing 5 % and over of zinc, the zinc is usually calculated by difference.
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:
| 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 |
Periodate (Photometric)Method| 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.
2. Referenced Documents
ASTM Standards
E29 Practice for Using Significant Digits in Test Data to Determine Conformance With Specifications
E50 Practices for Apparatus, Reagents, and Safety Precautions for Chemical Analysis of Metals
E55 Practice for Sampling Wrought Nonferrous Metals and Alloys for Determination of Chemical Composition
E60 Practice for Photometric and Spectrophotometric Methods for Chemical Analysis of Metals
E88 Practice for Sampling Nonferrous Metals and Alloys in Cast Form for Determination of Chemical Composition
Index Terms
ICS Number Code 77.040.30 (Chemical analysis of metals); 77.120.30 (Copper and copper alloys)
DOI: 10.1520/E0075-76R04
ASTM International is a member of CrossRef.
Citing ASTM Standards
[Back to Top]
