ASTM B91-17
(Specification)Standard Specification for Magnesium-Alloy Forgings
Standard Specification for Magnesium-Alloy Forgings
ABSTRACT
This specification covers UNS M11311, M11610, M11800, or M16600 magnesium alloy forgings. The conformance of each material to the required chemical composition can be determined using any suitable method of chemical analysis. Samples for chemical analysis should be taken when the ingots are poured or from the finished or semi-finished products by drilling, sawing, milling, turning, or clipping. The variations in testing speed do not seriously affect the obtained tensile property values. However, care must be exercised so that the testing speed does not exceed the ability of the equipment to function satisfactorily. Unless specified, forgings should be chrome pickled before shipment.
SCOPE
1.1 This specification covers magnesium alloy forgings designated as shown in Table 1. (A) Limits are in weight percent maximum unless shown as a range or stated otherwise.(B) These alloy designations were established in accordance with Practice B951.(C) Includes listed elements for which no specific limit is shown.
1.2 The values stated in inch-pound units are the standard. The SI values in parentheses are provided for information only.
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
Relations
Buy Standard
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:B91 −17
Standard Specification for
1
Magnesium-Alloy Forgings
This standard is issued under the fixed designation B91; the number immediately following the designation indicates the year of original
adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.Asuperscript
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* E29 Practice for Using Significant Digits in Test Data to
Determine Conformance with Specifications
1.1 This specification covers magnesium alloy forgings
E55 Practice for Sampling Wrought Nonferrous Metals and
designated as shown in Table 1.
Alloys for Determination of Chemical Composition
1.2 The values stated in inch-pound units are the standard.
2.3 Federal Standards:
3
TheSIvaluesinparenthesesareprovidedforinformationonly.
FED-STD-123H Marking for Shipment (Civil Agencies)
1.3 This international standard was developed in accor-
2.4 Military Standards:
dance with internationally recognized principles on standard- MIL-STD-129 Marking for Shipment and Storage (Military
3
ization established in the Decision on Principles for the
Agencies)
4
Development of International Standards, Guides and Recom- 2.5 Aerospace Materials Specification:
mendations issued by the World Trade Organization Technical
AMS-M-3171 MagnesiumAlloy, Processes for Pretreatment
Barriers to Trade (TBT) Committee. and Prevention of Corrosion on
3. Terminology
2. Referenced Documents
3.1 Definitions:
2.1 The following documents of the issue in effect on date
3.1.1 forging—a metal part worked to a predetermined
of material purchase form a part of this specification to the
shape by one or more such processes as hammering, upsetting,
extent referenced herein:
pressing, or rolling.
2
2.2 ASTM Standards:
3.1.2 die forging—a forging formed to the required shape
B296 Practice for Temper Designations of Magnesium
and size by working in impression dies.
Alloys, Cast and Wrought
3.1.3 hammer forging—a forging produced by repeated
B557 Test Methods for Tension Testing Wrought and Cast
blows in a forging hammer.
Aluminum- and Magnesium-Alloy Products
B660 Practices for Packaging/Packing of Aluminum and
3.1.4 hand forging—a forging worked between flat or sim-
Magnesium Products
ply shaped dies by repeated strokes or blows and manipulation
B666 Practice for Identification Marking of Aluminum and
of the piece.
Magnesium Products
4. Ordering Information
B951 PracticeforCodificationofUnalloyedMagnesiumand
Magnesium-Alloys, Cast and Wrought
4.1 Orders for forgings under this specification shall include
B953 Practice for Sampling Magnesium and Magnesium
the following information:
Alloys for Spectrochemical Analysis
4.1.1 Quantity of each forging,
B954 Test Method for Analysis of Magnesium and Magne- 4.1.2 Alloy (Section 6 and Table 1),
sium Alloys by Atomic Emission Spectrometry
4.1.3 Temper(Section7andTable2)inaccordancewiththe
requirements of Practice B296,
4.1.4 Drawing showing dimensions of all die forgings and
for all hand forgings not simple disks, rounds, squares, or
1
This specification is under the jurisdiction of ASTM Committee B07 on Light
Metals and Alloys and is the direct responsibility of Subcommittee B07.04 on rectangles (the amount of stock left for machine finish should
Magnesium Alloy Cast and Wrought Products.
be indicated),
Current edition approved May 1, 2017. Published May 2017. Originally
approved in 1932. Last previous edition approved in 2012 as B91 – 12. DOI:
3
10.1520/B0091-17. Available from Standardization Documents Order Desk, DODSSP, Bldg. 4,
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http://
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM www.dodssp.daps.mil.
4
Standards volume information, refer to the standard’s Document Summary page on Available from SAE International (SAE), 400 Commonwealth Dr.,Warrendale,
the ASTM website. PA 15096-0001, http://www.sae.org.
*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
1
---------------------- Page: 1 ----------------------
B91−17
A,B
TABLE 1 Chemical Composition Limits
NOTE 1—Analysis shall regularly be made only for the elements specifically mentioned in this table. If, however, the presence of other elements is
suspectedorindicatedinamountsgreaterthanthespecifiedlimits,furtheranalysisshallbemadetodeterminethattheseelem
...
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: B91 − 12 B91 − 17
Standard Specification for
1
Magnesium-Alloy Magnesium-Alloy Forgings
This standard is issued under the fixed designation B91; 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 alloy forgings designated as shown in Table 1.
1.2 The values stated in inch-pound units are the standard. The SI values in parentheses are provided for information only.
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 The following documents of the issue in effect on date of material purchase form a part of this specification to the extent
referenced herein:
2
2.2 ASTM Standards:
B296 Practice for Temper Designations of Magnesium Alloys, Cast and Wrought
B557 Test Methods for Tension Testing Wrought and Cast Aluminum- and Magnesium-Alloy Products
B660 Practices for Packaging/Packing of Aluminum and Magnesium Products
B666 Practice for Identification Marking of Aluminum and Magnesium Products
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
E55 Practice for Sampling Wrought Nonferrous Metals and Alloys for Determination of Chemical Composition
2.3 Federal Standards:
3
No. 123FED-STD-123H Marking for Shipment (Civil Agencies)
No. 184 Identification Marking of Aluminum, Magnesium, and Titanium.
2.4 Military Standards:
3
MIL-STD-129 Marking for Shipment and Storage (Military Agencies)
4
2.5 Aerospace Materials Specification:
AMS-M-3171 Magnesium Alloy, Processes for Pretreatment and Prevention of Corrosion on
3. Terminology
3.1 Definitions:
3.1.1 forging—a metal part worked to a predetermined shape by one or more such processes as hammering, upsetting, pressing,
or rolling.
3.1.2 die forging—a forging formed to the required shape and size by working in impression dies.
3.1.3 hammer forging—a forging produced by repeated blows in a forging hammer.
1
This specification is under the jurisdiction of 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 Nov. 1, 2012May 1, 2017. Published November 2012May 2017. Originally approved in 1932. Last previous edition approved in 20072012 as
B91 – 07.B91 – 12. DOI: 10.1520/B0091-12.10.1520/B0091-17.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Available from Standardization Documents Order Desk, DODSSP, Bldg. 4, Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http://www.dodssp.daps.mil.
4
Available from SAE International (SAE), 400 Commonwealth Dr.,Warrendale, PA 15096-0001, http://www.sae.org.
*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
1
---------------------- Page: 1 ----------------------
B91 − 17
A,B
TABLE 1 Chemical Composition Limits
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 amounts greater than the specified limits, further analysis shall be made to determine that these elements are not present in excess
of the specified limits.
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 ri
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.