【国外标准】 Standard Test Methods for Chemical Analysis of Copper Alloys

4.1 These test methods for the chemical analysis of metals and alloys are primarily intended as referee methods to test such materials for compliance with composition specifications. It is assumed that all who use these 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 copper alloys having chemical ranges within the following limits:2 Element Composition, %   Aluminum 12.0 maxAntimony  1.0 maxArsenic  1.0 maxCadmium  1.5 maxCobalt  1.0 maxCopper 40.0 minIron  6.0 maxLead 27.0 maxManganese  6.0 maxNickel 50.0 maxPhosphorus  1.0 maxSilicon  5.0 maxSulfur  0.1 maxTin 20.0 maxZinc 50.0 max1.2 The test methods appear in the following order:  SectionsAluminum by the Carbamate Extraction-Ethyl-enedinitrilotetraacetate Titrimetric Test Method [2 % to 12 %] 71 – 78Copper by the Combined Electrodeposition Gravimetric and Oxalyldihydrazide Spectrophotometric Test Method [50 %, minimum] 10 – 18Iron by the 1,10-Phenanthroline Spectrophotometric Test Method [0.003 % to 1.25 %] 19 – 28Lead by Atomic Absorption Spectrometry [0.002 % to 15 %] 90 – 100Lead by the Ethylenedinitrilotetraacetic Acid (EDTA) Titrimetric Test Method [2.0 % to 30.0 %] 29 – 36Nickel by the Dimethylglyoxime Extraction Sprectophotometric Test Method [0.03 % to 5.0 %] 37 – 46Nickel by the Dimethylglyoxime Gravimetric Test Method [4 % to 50 %] 55 – 62Silver in Silver-Bearing Copper by Atomic Absorption Spectrometry [0.01 % to 0.12 %] 101 – 112Tin by the Iodotimetric Titration Test Method [0.5 % to 20 %] 63 – 70Tin by the Phenylfluorone Spectrophotometric Test Method [0.01 % to 1.0 %] 113 – 123Zinc by Atomic Absorption Spectrometry [0.2 % to 2 %] 79 – 89Zinc by the Ethylenedinitrilotetraacetic Acid (EDTA) Titrimetric Test Method [2 % to 40 %] 47 – 541.3 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 the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.