ASTM B954 - 15
Standard Test Method for Analysis of Magnesium and Magnesium Alloys by Atomic Emission Spectrometry
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Significance and Use
5.1 The metallurgical properties of magnesium and its alloys are highly dependant on chemical composition. Precise and accurate analyses are essential to obtaining desired properties, meeting customer specifications and helping to reduce scrap due to off-grade material.
5.2 This test method is applicable to chill cast specimens as defined in Practice B953 and can also be applied to other types of samples provided that suitable reference materials are available.
1. Scope
1.1 This test method describes the analysis of magnesium and its alloys by atomic emission spectrometry. The magnesium specimen to be analyzed may be in the form of a chill cast disk, casting, sheet, plate, extrusion or some other wrought form or shape. The elements covered in the scope of this method are listed in the table below.
| Element | Mass Fraction Range (Wt %) |
| Aluminum | 0.001 to 12.0 |
| Beryllium | 0.0001 to 0.01 |
| Boron | 0.0001 to 0.01 |
| Cadmium | 0.0001 to 0.05 |
| Calcium | 0.0005 to 0.05 |
| Cerium | 0.01 to 3.0 |
| Chromium | 0.0002 to 0.005 |
| Copper | 0.001 to 0.05 |
| Dysprosium | 0.01 to 1.0 |
| Erbium | 0.01 to 1.0 |
| Gadolinium | 0.01 to 3.0 |
| Iron | 0.001 to 0.06 |
| Lanthanum | 0.01 to 1.5 |
| Lead | 0.005 to 0.1 |
| Lithium | 0.001 to 0.05 |
| Manganese | 0.001 to 2.0 |
| Neodymium | 0.01 to 3.0 |
| Nickel | 0.0005 to 0.05 |
| Phosphorus | 0.0002 to 0.01 |
| Praseodymium | 0.01 to 0.5 |
| Samarium | 0.01 to 1.0 |
| Silicon | 0.002 to 5.0 |
| Silver | 0.001 to 0.2 |
| Sodium | 0.0005 to 0.01 |
| Strontium | 0.01 to 4.0 |
| Tin | 0.002 to 0.05 |
| Titanium | 0.001 to 0.02 |
| Yttrium | 0.02 to 7.0 |
| Ytterbium | 0.01 to 1.0 |
| Zinc | 0.001 to 10.0 |
| Zirconium | 0.001 to 1.0 |
Note 1: The mass fraction ranges given in the above scope are estimates based on two manufacturers observations and data provided by a supplier of atomic emission spectrometers. The range shown for each element does not demonstrate the actual usable analytical range for that element. The usable analytical range may be extended higher or lower based on individual instrument capability, spectral characteristics of the specific element wavelength being used and the availability of appropriate reference materials.
1.2 This test method is suitable primarily for the analysis of chill cast disks as described in Sampling Practice B953. Other forms may be analyzed, provided that: (1) they are sufficiently massive to prevent undue heating, (2) they allow machining to provide a clean, flat surface which creates a seal between the specimen and the spark stand, and (3) reference materials of a similar metallurgical condition (spectrochemical response) and chemical composition are available.
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. Specific safety and health statements are given in Section 10.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
ASTM Standards
B953 Practice for Sampling Magnesium and Magnesium Alloys for Spectrochemical Analysis
E135 Terminology Relating to Analytical Chemistry for Metals, Ores, and Related Materials
E305 Practice for Establishing and Controlling Atomic Emission Spectrochemical Analytical Curves
E406 Practice for Using Controlled Atmospheres in Spectrochemical Analysis
E826 Practice for Testing Homogeneity of a Metal Lot or Batch in Solid Form by Spark Atomic Emission Spectrometry
E1257 Guide for Evaluating Grinding Materials Used for Surface Preparation in Spectrochemical Analysis
E1329 Practice for Verification and Use of Control Charts in Spectrochemical Analysis
E1507 Guide for Describing and Specifying the Spectrometer of an Optical Emission Direct-Reading Instrument
ICS Code
ICS Number Code 77.040.30 (Chemical analysis of metals); 77.120.20 (Magnesium and magnesium alloys)
UNSPSC Code
UNSPSC Code 12141502(Magnesium Mg); 11101711(Non ferrous alloy)
Referencing This Standard
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DOI: 10.1520/B0954-15
Citation Format
ASTM B954-15, Standard Test Method for Analysis of Magnesium and Magnesium Alloys by Atomic Emission Spectrometry, ASTM International, West Conshohocken, PA, 2015, www.astm.org
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