ASTM B91-97(2004)

Standard Specification for Magnesium-Alloy Forgings

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.

General Information

• Status: Historical
• Publication Date: 31-May-2004
• 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 B91-97 - Standard Specification for Magnesium-Alloy Forgings
• Effective Date: 01-Jun-2004
• Replaced By: ASTM B91-07 - Standard Specification for Magnesium-Alloy Forgings
• Effective Date: 01-Jun-2007
• Referred By: ASTM B951-11(2018) - Standard Practice for Codification of Unalloyed Magnesium and Magnesium-Alloys, Cast and Wrought
• Effective Date: 01-Jun-2004
• Referred By: ASTM B881-17 - Standard Terminology Relating to Aluminum- and Magnesium-Alloy Products
• Effective Date: 01-Jun-2004

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: B 91 – 97 (Reapproved 2004)
Standard Specification for
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Magnesium-Alloy Forgings
ThisstandardisissuedunderthefixeddesignationB 91;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginal
adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.Asuperscript
epsilon (e) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope 3. Terminology
1.1 This specification covers magnesium alloy forgings 3.1 Definitions:
designated as shown in Table 1. 3.1.1 forging—a metal part worked to a predetermined
1.2 The values stated in inch-pound units are the standard. shape by one or more such processes as hammering, upsetting,
TheSIvaluesinparenthesesareprovidedforinformationonly. pressing, or rolling.
3.1.2 die forging—a forging formed to the required shape
2. Referenced Documents
and size by working in impression dies.
2.1 The following documents of the issue in effect on date 3.1.3 hammer forging—a forging produced by repeated
of material purchase form a part of this specification to the
blows in a forging hammer.
extent referenced herein: 3.1.4 hand forging—a forging worked between flat or sim-
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2.2 ASTM Standards:
ply shaped dies by repeated strokes or blows and manipulation
B 275 Practice for Codification of Certain Nonferrous Met- of the piece.
als and Alloys, Cast and Wrought
4. Ordering Information
B 557 Test Methods of Tension Testing Wrought and Cast
Aluminum- and Magnesium-Alloy Products 4.1 Orders for forgings under this specification shall include
B 660 Practices for Packaging/Packing of Aluminum and the following information:
Magnesium Products 4.1.1 Quantity of each forging,
E 29 Practice for Using Significant Digits in Test Data to 4.1.2 Alloy (Section 6 and Table 1),
Determine Conformance with Specifications 4.1.3 Temper (Section 7 and Table 2),
E 35 Test Methods for Chemical Analysis of Magnesium 4.1.4 Drawing showing dimensions of all die forgings and
and Magnesium Alloys for all hand forgings not simple disks, rounds, squares, or
E 55 PracticeforSamplingWroughtNonferrousMetalsand rectangles (the amount of stock left for machine finish should
Alloys for Determination of Chemical Composition be indicated),
2.3 Federal Standards: 4.1.5 Surface treatment (see 9.1),
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No. 123 Marking for Shipment (Civil Agencies) 4.1.6 Whether inspection is required at the manufacturer’s
No. 184 Identification Marking of Aluminum, Magnesium, works (see 10.1),
and Titanium. 4.1.7 Special inspection requirements (see 10.2),
2.4 Military Standards: 4.1.8 Whether certification is required (see 12.1), and
MIL-M-3171 MagnesiumAlloy, Processes for Pretreatment 4.1.9 Whether marking for identification is required (see
and Prevention of Corrosion on 13.1).
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MIL-STD-129 Marking for Shipment and Storage
5. Quality Assurance
5.1 The manufacturer shall be responsible for the perfor-
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This specification is under the jurisdiction of ASTM Committee B07 on Light
mance of all inspection and tests required by this specification,
Metals and Alloys and is the direct responsibility of Subcommittee B07.04 on
prior to shipment of the material.
Magnesium Alloy Cast and Wrought Products.
Current edition approved June 1, 2004. Published June 2004. Originally
6. Chemical Composition
approved in 1932. Last previous edition approved in 1997 as B 91 – 97.
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or
6.1 Limits—The material shall conform to the chemical
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
composition limits prescribed in Table 1. The manufacturer
Standards volume information, refer to the standard’s Document Summary page on
shalldetermineconformancebyanalyzingsamplestakenwhen
the ASTM website.
3
Available from Standardization Documents Order Desk, DODSSP, Bldg. 4,
the ingots are poured, or by analyzing samples taken from the
Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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B 91 – 97 (2004)
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,furtheranalysisshallbemadetodeterminethattheseelementsarenotpresentinexcess
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 right-hand place of
...