ASTM B92 - B 92M - 17 (2025) 重熔用未合金化镁锭和镁棒标准规范

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Designation: B92/B92M −17 (Reapproved 2025)
Standard Speciﬁcation for
Unalloyed Magnesium Ingot and Stick For Remelting
1
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 gener-
ally 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 inde-
pendently of the other.
1.3 This international standard was developed in accor-
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
2. Referenced Documents
2.1 ASTM Standards:
2
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 Magne-
sium Alloys by Atomic Emission Spectrometry
E29 Practice for Using Signiﬁcant Digits in Test Data to
Determine Conformance with Speciﬁcations
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, in accordance with the requirements of Prac-
tice B951 (Section 6and 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.
6. Chemical Composition
6.1 Limits—The material shall conform to the requirements
as to chemical composition prescribed in Table 1.
6.2 Sampling:
6.2.1 Sufficient samples shall be taken by the manufacturer
to assure conformance to the chemical composition require-
ments of the alloy. Samples shall be taken from the molten
metal in accordance with the requirements of Practice B953
when the ingot is poured or from the ingot. Samples shall be
representative of the material.
6.2.2 In case of dispute, the sampling for chemical analysis
shall be according to the requirements of Practice E88. If the
ingots are shipped in carload lots of the same alloy, not less
than four ingots shall be taken at random from the carload for
sampling. If the shipment is in less than carload lots, one ingot
shall be taken for sampling for each 10 000 lb [4500 kg] or
fraction thereof.
6.3 Methods of Analysis—Any suitable method of chemical
analysis may be used. In case of dispute, the analysis shall be
made by methods given in Test Method B954, or any other
1
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, 2025. Published May 2025. Originally
approved in 1933. Last previous edition approved in 2017 as B92/B92M – 17. DOI:
10.1520/B0092_B0092M-17R25.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at www.astm.org/contact. For Annual Book of
ASTM Standards volume information, refer to the standard’s Document Summary
page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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.
1

standard methods of analysis approved by ASTM unless some

other method is agreed upon by the purchaser and vendor.

7. General Quality

7.1 Magnesium ingot and stick shall have a clean surface

and shall be commercially free from dirt, slag, or other foreign

material.

8. Rejection

8.1 Material that does not conform to the requirements of

this speciﬁcation may be rejected, and if rejected the conditions

of replacement shall be as agreed upon between the purchaser

and the seller. The seller’s responsibility shall be limited to a

period of six months from shipping date unless other agree-

ment is made by the purchaser and seller.

9. Packaging, Marking, and Shipping

9.1 The material shall be packaged in such a manner as to

prevent damage in ordinary handling and transportation. The

type of packaging and gross weight of individual containers

shall be left to the discretion of the seller unless otherwise

agreed upon. Packaging methods and containers shall be so

selected as to permit maximum utility of mechanical equip-

ment in unloading and subsequent handling. Each package or

container shall contain only one size and form of material when

packed for shipment unless otherwise agreed upon.

9.2 Packages or containers shall be such as to ensure

acceptance by common or other carriers for safe transportation

at the lowest rate to the point of delivery.

9.3 Each package or container shall be marked with the

purchase order number, form, quantity, speciﬁcation number,

gross and net weights, and the name of the manufacturer.

10. Keywords

10.1 chemical speciﬁcations; compositional limits; contami-

nants; contents; grades; magnesium; pure; unalloyed

ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned

in this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk

of infringement of such rights, are entirely their own responsibility.

This standard is subject to revision at any time by the responsible technical committee and must be reviewed every ﬁve years and

if not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standards

and should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of the

responsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you should

make your views known to the ASTM Committee on Standards, at the address shown below.

This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,

United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the above

address or at 610-832-9585 (phone), or through the ASTM website (www.astm.org/contact). Permission rights to photocopy the

standard may also be secured from the Copyright Clearance Center, 222 Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600;

http://www.copyright.com/

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-

tion Chemical Composition, % max unless shown as a range or as a min

Practice UNS Mag-

nesium

Alumi-

num Copper Iron Lead Manga-

nese Nickel Silicon Sodium Tin Titanium

Other

Elements

Each

A,B

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

9990A

M19990 99.90 min 0.003 . . . 0.04 . . . 0.004 0.001 0.005 . . . . . . . . . 0.01

9995A

M19995 99.95 min 0.01 . . . 0.003 . . . 0.004 0.001 0.005 . . . . . . 0.01 0.005

9998A

M19998 99.98 min 0.004 0.0005 0.002 0.001 0.002 0.0005 0.003 . . . . . . 0.001 0.005

For speciﬁc applications, other minor impurities may be required to be controlled to limiting maxima by agreement between the purchaser and the seller.

Includes elements for which no speciﬁc limit is shown.

For nuclear applications, the cadmium and boron (high-capture cross-section elements) shall be speciﬁed as follows:

Cadmium, max, % 0.0001 or 0.00005

Boron, max, % 0.00007 or 0.00003

B92/B92M − 17 (2025)

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标签： #合金 #标准规范

摘要：

ASTM B92 - B 92M - 17 (2025) 是美国材料与试验协会发布的重熔用未合金化镁锭和镁棒标准规范，适用于以重熔为目的的未合金化镁锭与镁棒产品。该规范详细规定了镁的化学成分要求、取样方法、试验步骤、合格判定准则以及包装、标志和运输等要求，旨在确保镁原料在后续铸造、挤压或合金化过程中的质量一致性与可追溯性。标准覆盖多个牌号，明确了杂质元素如铁、铝、锰、镍、铜等的最大允许含量，并提供了相应的分析测试标准依据。该规范同时以英制和SI单位双版本呈现（A版与M版），方便全球贸易与工程应用

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