ASTM B92/B92M-17

Standard Specification for Unalloyed Magnesium Ingot and Stick For Remelting

ABSTRACT
This specification covers the standard for magnesium alloys in ingot and stick forms proposed for used in remelting. Magnesium 9980A alloys are available in ingot and stick form. Magnesium 9980B, 9990A, 9995A, and 9998A, on the other hand, are generally available in ingot form only. The specimens shall be produced with no slag and shall have a clean surface free from dirt, slag, or other foreign contaminants. Alloys shall adhere to specified chemical composition requirements. Any suitable chemical analysis method can be used unless otherwise prescribed.
SCOPE
1.1 This specification covers magnesium in the form of ingot and stick for remelting: 9980A is available in ingot and stick form, and 9980B, 9990A, 9995A, and 9998A are generally available only in ingot form.  
1.2 The values stated in SI units are to be regarded as a separate standard. The values stated in each system are not exact equivalents, therefore each system must be used independently of the other.  
1.3 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.

General Information

• Status: Published
• Publication Date: 30-Apr-2017
• ICS: 77.150.20 - Magnesium products
• Technical Committee: B07 - Light Metals and Alloys
• Drafting Committee: B07.04 - Magnesium Alloy Cast and Wrought Products

Relations

• Replaces: ASTM B92/B92M-11 - Standard Specification for Unalloyed Magnesium Ingot and Stick For Remelting
• Effective Date: 01-May-2017
• Refers: ASTM E88-11(2017) - Standard Practice for Sampling Nonferrous Metals and Alloys in Cast Form for Determination of Chemical Composition
• Effective Date: 01-Sep-2017
• Refers: ASTM B951-11 - Standard Practice for Codification of Unalloyed Magnesium and Magnesium-Alloys, Cast and Wrought
• Effective Date: 01-Nov-2011
• Refers: ASTM E88-11 - Standard Practice for Sampling Nonferrous Metals and Alloys in Cast Form for Determination of Chemical Composition
• Effective Date: 01-May-2011
• Refers: ASTM B951-10 - Standard Practice for Codification of Unalloyed Magnesium and Magnesium-Alloys, Cast and Wrought
• Effective Date: 01-Feb-2010
• Refers: ASTM B951-09 - Standard Practice for Codification of Unalloyed Magnesium and Magnesium-Alloys, Cast and Wrought
• Effective Date: 01-Jun-2009
• Refers: ASTM E29-08 - Standard Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
• Effective Date: 01-Oct-2008
• Refers: ASTM B951-08 - Standard Practice for Codification of Unalloyed Magnesium and Magnesium-Alloys, Cast and Wrought
• Effective Date: 01-Mar-2008
• Refers: ASTM B953-07 - Standard Practice for Sampling Magnesium and Magnesium Alloys for Spectrochemical Analysis
• Effective Date: 01-Jun-2007
• Refers: ASTM B954-07 - Standard Test Method for Analysis of Magnesium and Magnesium Alloys by Atomic Emission Spectrometry
• Effective Date: 01-Jun-2007
• Refers: ASTM B951-07 - Standard Practice for Codification of Unalloyed Magnesium and Magnesium-Alloys, Cast and Wrought
• Effective Date: 15-Apr-2007
• Refers: ASTM E29-06b - Standard Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
• Effective Date: 15-Nov-2006
• Refers: ASTM E29-06a - Standard Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
• Effective Date: 15-Sep-2006
• Refers: ASTM E29-06 - Standard Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
• Effective Date: 01-May-2006
• Refers: ASTM E88-91(2005) - Standard Practice for Sampling Nonferrous Metals and Alloys in Cast Form for Determination of Chemical Composition
• Effective Date: 01-Oct-2005

Overview

ASTM B92/B92M-17 - Standard Specification for Unalloyed Magnesium Ingot and Stick For Remelting establishes the requirements for unalloyed magnesium, provided in ingot and stick forms, intended for remelting during the production of magnesium alloys and magnesium-based products. The standard details chemical composition, sampling, packaging, and quality control to ensure the raw magnesium meets the necessary purity and cleanliness for industrial applications.

This specification applies to several grades of magnesium, including 9980A (available as ingot and stick) as well as 9980B, 9990A, 9995A, and 9998A (primarily ingot form). The document ensures that magnesium ingots and sticks are free from dirt, slag, and contaminants, confirming their suitability for remelting processes across various sectors.

Key Topics

• Material Grades: Defines purity levels for grades 9980A, 9980B, 9990A, 9995A, and 9998A. Each has specified minimum magnesium content and compositional limits for trace elements such as aluminum, manganese, copper, iron, lead, nickel, and silicon.
• Form and Supply: Outlines options for supplying magnesium as ingots or sticks, depending on the grade and end-use requirements.
• Chemical Composition: Requires material to strictly conform to composition limits listed in the standard, with regular analysis to check for other potential impurities.
• Sampling and Analysis: Specifies procedures for representative sampling (in accordance with ASTM B953 and E88) and allows any suitable chemical analysis method unless otherwise agreed. Atomic emission spectrometry (ASTM B954) is referenced for analysis.
• Quality Control: Material must have a clean, slag-free surface and be free of foreign contaminants. Scrap is subject to controlled usage as specified.
• Packaging and Marking: Prescribes packaging that ensures protection during shipping and handling, with clear labeling including grade, quantity, and weights.

Applications

Implementing ASTM B92/B92M-17 is critical for industries that require reliable sources of high-purity unalloyed magnesium for remelting and alloy manufacturing. Typical applications include:

• Magnesium Alloy Production: Magnesium ingots and sticks provide base metal for producing various magnesium alloys, utilized in the automotive, aerospace, and electronics sectors.
• Remelting Processes: Ensures consistency and predictable chemical input during remelting, supporting the production of quality cast and wrought magnesium products.
• Manufacturing Practices: Supports foundries and metal processors seeking to comply with international standards for input materials, enhancing product quality and traceability.
• Supply Chain Assurance: Certifies the composition and cleanliness of magnesium feedstock, reducing risk of contamination and performance issues in final alloyed products.

Related Standards

When applying ASTM B92/B92M-17, consider the following related standards for comprehensive magnesium and nonferrous metal quality assurance:

• ASTM B951: Practice for Codification of Unalloyed Magnesium and Magnesium-Alloys, Cast and Wrought
• ASTM B953: Practice for Sampling Magnesium and Magnesium Alloys for Spectrochemical Analysis
• ASTM B954: Test Method for Analysis of Magnesium and Magnesium Alloys by Atomic Emission Spectrometry
• ASTM E29: Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
• ASTM E88: Practice for Sampling Nonferrous Metals and Alloys in Cast Form for Determination of Chemical Composition

These referenced documents support standardized testing and analysis, further ensuring the quality, consistency, and compliance of magnesium products used worldwide.

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Keywords: ASTM B92/B92M-17, magnesium ingot specification, unalloyed magnesium, magnesium stick for remelting, magnesium chemical composition, magnesium alloy production, magnesium sampling ASTM, pure magnesium standards.

Standards Content (Sample)

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.
Designation:B92/B92M −17
Standard Specification for
Unalloyed Magnesium Ingot and Stick For Remelting
This standard is issued under the fixed designation B92/B92M; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope* 3.1.2 stick—an extruded form substantially uniform in cross
section cut to desired length or weight.
1.1 This specification covers magnesium in the form of
ingot and stick for remelting: 9980A is available in ingot and
4. Ordering Information
stick form, and 9980B, 9990A, 9995A, and 9998A are gener-
ally available only in ingot form. 4.1 Orders for ingot and stick under this specification shall
include the following information:
1.2 The values stated in SI units are to be regarded as a
4.1.1 Grade, in accordance with the requirements of Prac-
separate standard. The values stated in each system are not
tice B951 (Section 6 and Table 1),
exact equivalents, therefore each system must be used inde-
4.1.2 Quantity, in pieces or pounds [kilograms], and
pendently of the other.
4.1.3 Form; by agreement between the purchaser and the
1.3 This international standard was developed in accor-
manufacturer the approximate form and weight of each piece
dance with internationally recognized principles on standard-
or ingot may be specified.
ization established in the Decision on Principles for the
4.1.4 For inch-pound orders specify B92, for metric orders
Development of International Standards, Guides and Recom-
specify B92M. Do not mix units.
mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
5. Materials and Manufacture
2. Referenced Documents
5.1 No scrap shall be used in the production of magnesium
ingot and stick, except such as shall accumulate at the
2.1 ASTM Standards:
manufacturer’splantsfrommaterialofsimilarcompositionand
B951 PracticeforCodificationofUnalloyedMagnesiumand
of his own manufacture.
Magnesium-Alloys, Cast and Wrought
B953 Practice for Sampling Magnesium and Magnesium
6. Chemical Composition
Alloys for Spectrochemical Analysis
B954 Test Method for Analysis of Magnesium and Magne-
6.1 Limits—The material shall conform to the requirements
sium Alloys by Atomic Emission Spectrometry
as to chemical composition prescribed in Table 1.
E29 Practice for Using Significant Digits in Test Data to
6.2 Sampling:
Determine Conformance with Specifications
6.2.1 Sufficient samples shall be taken by the manufacturer
E88 Practice for Sampling Nonferrous Metals and Alloys in
to assure conformance to the chemical composition require-
Cast Form for Determination of Chemical Composition
ments of the alloy. Samples shall be taken from the molten
metal in accordance with the requirements of Practice B953
3. Terminology
when the ingot is poured or from the ingot. Samples shall be
3.1 Definitions:
representative of the material.
3.1.1 ingot—a cast form suitable for remelting.
6.2.2 In case of dispute, the sampling for chemical analysis
shall be according to the requirements of Practice E88.Ifthe
ingots are shipped in carload lots of the same alloy, not less
This specification is under the jurisdiction of the ASTM Committee B07 on
than four ingots shall be taken at random from the carload for
Light Metals andAlloys and is the direct responsibility of Subcommittee B07.04 on
Magnesium Alloy Cast and Wrought Products.
sampling. If the shipment is in less than carload lots, one ingot
Current edition approved May 1, 2017. Published May 2017. Originally
shall be taken for sampling for each 10 000 lb [4500 kg] or
approved in 1933. Last previous edition approved in 2011 as B92/B92M – 11. DOI:
fraction thereof.
10.1520/B0092_B0092M-17.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
6.3 Methods of Analysis—Any suitable method of chemical
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
analysis may be used. In case of dispute, the analysis shall be
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. made by methods given in Test Method B954, or any other
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
B92/B92M−17
TABLE 1 Chemical Requirements
NOTE 1—Analysis shall regularly be made only for the elements specifically mentioned in this table. If, however, the presence of other elements is
suspected or indicated in the course of routine analysis, further analysis shall be made to determine that the total
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: B92/B92M − 11 B92/B92M − 17
Standard Specification for
Unalloyed Magnesium Ingot and Stick For Remelting
This standard is issued under the fixed designation B92/B92M; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope*
1.1 This specification covers magnesium in the form of ingot and stick for remelting: 9980A is available in ingot and stick form,
and 9980B, 9990A, 9995A, and 9998A are generally available only in ingot form.
1.2 The values stated in SI units are to be regarded as a separate standard. The values stated in each system are not exact
equivalents, therefore each system must be used independently of the other.
1.3 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.
2. Referenced Documents
2.1 ASTM Standards:
B951 Practice for Codification of Unalloyed Magnesium and Magnesium-Alloys, Cast and Wrought
B953 Practice for Sampling Magnesium and Magnesium Alloys for Spectrochemical Analysis
B954 Test Method for Analysis of Magnesium and Magnesium Alloys by Atomic Emission Spectrometry
E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
E35 Test Methods for Chemical Analysis of Magnesium and Magnesium Alloys (Withdrawn 2008)
E88 Practice for Sampling Nonferrous Metals and Alloys in Cast Form for Determination of Chemical Composition
3. Terminology
3.1 Definitions:
3.1.1 ingot—a cast form suitable for remelting.
3.1.2 stick—an extruded form substantially uniform in cross section cut to desired length or weight.
4. Ordering Information
4.1 Orders for ingot and stick under this specification shall include the following information:
4.1.1 Grade Grade, in accordance with the requirements of Practice B951 (Section 6 and Table 1),
4.1.2 Quantity, in pieces or pounds [kilograms], and
4.1.3 Form; by agreement between the purchaser and the manufacturer the approximate form and weight of each piece or ingot
may be specified.
4.1.4 For inch-pound orders specify B92, for metric orders specify B92M. Do not mix units.
5. Materials and Manufacture
5.1 No scrap shall be used in the production of magnesium ingot and stick, except such as shall accumulate at the
manufacturer’s plants from material of similar composition and of his own manufacture.
This specification is under the jurisdiction of the ASTM Committee B07 on Light Metals and Alloys and is the direct responsibility of Subcommittee B07.04 on
Magnesium Alloy Cast and Wrought Products.
Current edition approved May 1, 2011May 1, 2017. Published June 2011May 2017. Originally approved in 1933. Last previous edition approved in 20072011 as
B92/B92MB92/B92M – 11.–07. DOI: 10.1520/B0092_B0092M-11.10.1520/B0092_B0092M-17.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
B92/B92M − 17
TABLE 1 Chemical Requirements
NOTE 1—Analysis shall regularly be made only for the elements specifically mentioned in this table. If, however, the presence of other elements is
suspected or indicated in the course of routine analysis, further analysis shall be made to determine that the total of these other elements is not in excess
of the limits specified in the last column of the table.
NOTE 2—The following applies to all specified limits in this table: For purposes of acceptance and rejection, an observed value or a calculated value
obtained from analysis should be rounded to the nearest unit in the last right-hand place of figures used in expressing the specified limit (see Practice
E29.
Designa-
Chemical Composition, % max unless shown as a range or as a min
tion
Other
MagnesiumAluminum Manganese
Practice UNS Copper Iron Lead Nickel Silicon Sodium Tin Titanium Elements
A,B
Eeach
9980A M19980 99.80 min . 0.02 . 0.01 0.10 0.001 . 0.006 0.01 . 0.05
9980B M19991 99.80 min . 0.02 . 0.01 0.10 0.005 . . 0.01 . 0.05
C
9990A M19990 99.90 min 0.003 . 0.04 . 0.004 0.001 0.005 . . . 0.01
C
9995A M19995 99.95 min 0.01 . 0.003 . 0.004 0.001 0.005 . . 0.01 0.005
C
9998A M19998 99.98 min 0.004 0.0005 0.002 0.001 0.002 0.0005 0.003 . . 0.001 0.005
TABLE 1 Chemical Requirements
NOTE 1—Analysis shall regularly be made only for the elements specifically mentioned in this table. If, however, the presence of other elements is
suspected or indicated in the course of routine analysis, further analysis shall be made to determine that the total of these other elements is not in excess
of the limits specified in the last column of the table.
NOTE 2—The following applies to all specified limits in this table: For purposes of acceptance and rejection, an observed value or a calculated value
obtained from analysis should be rounded to the nearest unit in the last right-hand place of figures used in expressing the specified limit (see Practice
E29.
Designa-
Chemical Composition, % max unless shown as a range or as a min
tio
...